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CO 84-0464189 1100 West 116th Avenue Westminster CO 80234 303 452-6111 No Yes Non-accelerated Filer false false false 0 6149506000 6075291000 197543000 143940000 6347049000 6219231000 3005440000 2913707000 3341609000 3305524000 804945000 853410000 725089000 760477000 79856000 92933000 3421465000 3398457000 193696000 194825000 1138000 1533000 1468000 2137000 166925000 157915000 12380000 14674000 375607000 371084000 218696000 177557000 17940000 1111000 34749000 32620000 94592000 83743000 77059000 32892000 91194000 124170000 105018000 109146000 639248000 561239000 824285000 853834000 3503000 0 55169000 58546000 882957000 912380000 5319277000 5243160000 891660000 917276000 1285000 1545000 129358000 130132000 1022303000 1048953000 2859974000 3093216000 3882277000 4142169000 19965000 10383000 201994000 129552000 181862000 100000 17440000 28717000 119979000 136501000 41912000 22632000 30087000 33505000 61879000 80052000 675118000 441442000 510741000 358446000 0 -254000 167842000 200267000 73544000 91880000 752127000 650339000 9755000 9210000 5319277000 5243160000 330210000 306568000 861595000 820217000 92553000 54489000 204720000 147392000 16491000 57343000 50700000 145469000 -28320000 0 -39893000 2719000 65263000 39906000 170528000 107836000 476197000 458306000 1247650000 1223633000 165790000 138450000 401202000 345999000 67929000 32035000 140375000 120378000 43764000 44842000 138008000 119022000 50782000 51917000 141050000 137876000 38429000 43905000 125605000 123183000 44460000 75647000 141196000 219582000 -923000 1234000 9225000 8406000 2507000 2432000 8377000 7474000 412738000 390462000 1105038000 1081920000 63459000 67844000 142612000 141713000 2261000 1998000 5783000 7609000 866000 856000 2091000 1991000 990000 -135000 5993000 499000 4117000 2719000 13867000 10099000 46198000 53623000 138045000 144278000 1762000 6499000 5227000 16951000 44436000 47124000 132818000 127327000 0 196000 0 196000 23140000 23243000 23661000 24289000 54000 48000 158000 143000 23086000 23195000 23503000 24146000 23140000 23243000 23661000 24289000 -108000 17000 -163000 137000 100000 0 100000 0 235000 0 235000 0 79000 61000 238000 182000 -364000 78000 -260000 319000 22776000 23321000 23401000 24608000 54000 48000 158000 143000 22722000 23273000 23243000 24465000 868574000 898371000 917276000 912922000 23086000 23195000 23503000 24146000 0 0 49119000 15502000 891660000 921566000 891660000 921566000 1649000 1206000 1545000 965000 -108000 17000 -163000 137000 100000 0 100000 0 235000 0 235000 0 79000 61000 238000 182000 1285000 1284000 1285000 1284000 129865000 130330000 130132000 130498000 -54000 -48000 -158000 -143000 561000 296000 932000 559000 129358000 130082000 129358000 130082000 1022303000 1052932000 1022303000 1052932000 23661000 24289000 141196000 219582000 3887000 0 10568000 10562000 0 4029000 1944000 1639000 3384000 5089000 -41384000 -8912000 -6564000 1486000 40612000 0 50700000 145469000 1525000 1923000 -7277000 -8050000 52729000 7128000 -32976000 29541000 -4128000 1773000 15390000 -7813000 19280000 20911000 -3418000 -3563000 -6353000 0 208437000 86033000 2535000 -12617000 333324000 150677000 187635000 281782000 7308000 5917000 16044000 0 -292000 6009000 -163991000 -281874000 9582000 424000 257178000 80823000 5737000 137000000 1389000 1106000 181662000 84292000 49119000 19234000 932000 559000 -397000 -570000 -112034000 119424000 57299000 -11773000 180805000 233537000 238104000 221764000 97387000 92988000 1937000 798000 1141000 927000 PRESENTATION OF FINANCIAL INFORMATION<div style="margin-top:10pt;text-indent:36pt"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%">The accompanying unaudited consolidated financial statements, which represent the consolidated financial statements of Tri-State Generation and Transmission Association, Inc. (“Tri-State”) and its wholly owned and majority-owned subsidiaries, have been prepared in accordance with accounting principles generally accepted in the United States (“GAAP”) for interim financial information and pursuant to the rules and regulations of the Securities and Exchange Commission (“SEC”). Accordingly, they do not include all of the information and footnotes required by GAAP for complete financial statements. These unaudited consolidated financial statements should be read in conjunction with the financial statements and notes thereto included in Tri-State's annual report on Form 10-K for the year ended December 31, 2025 filed with the SEC. In the opinion of management, all adjustments, consisting of normal recurring accruals considered necessary for a fair presentation, have been included. Tri-State's consolidated financial position as of September 30, 2026, results of operations for the three and nine months ended September 30, 2026 and 2025, and cash flows for the nine months ended September 30, 2026 and 2025 are not necessarily indicative of the results that may be expected for an entire year or any other period.</span></div><div style="margin-top:10pt;padding-left:18pt"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-style:italic;font-weight:400;line-height:120%">Basis of Consolidation</span></div><div style="margin-top:10pt;text-indent:36pt"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%">Tri-State is a taxable wholesale electric power generation and transmission cooperative operating on a not-for-profit basis serving large portions of Colorado, Nebraska, New Mexico and Wyoming. Tri-State was incorporated under the laws of the State of Colorado in 1952. Tri-State has thirty-nine electric distribution member systems ("Utility Members") who are Class A - utility full requirements members to which it provides power pursuant to long-term wholesale electric service contracts. Tri-State has three non-utility members (“Non-Utility Members”). Tri-State's Class A Utility Members and Non-Utility Members are collectively referred to as its “Members.” </span></div><div style="margin-top:10pt;text-indent:36pt"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%">Tri-State provides wholesale power to its Utility Members at rates determined by its Board of Directors ("Board"), subject to FERC approval or acceptance. Rates are designed to recover all costs and provide margins to increase Utility Members' equity and to meet certain financial covenants, including a debt service ratio ("DSR") requirement and equity to capitalization ratio ("ECR") requirement.</span></div><div style="margin-top:10pt;text-indent:36pt"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%">Tri-State complies with the Uniform System of Accounts as prescribed by FERC. In conformity with GAAP, the accounting policies and practices applied by Tri-State in the determination of rates are also employed for financial reporting purposes.</span></div><div style="margin-top:10pt;text-indent:36pt"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%">The accompanying financial statements reflect the consolidated accounts of Tri-State, its wholly-owned and majority-owned subsidiaries, and certain variable interest entities for which Tri-State or its subsidiaries are the primary beneficiaries. See Note 17 – Variable Interest Entities. Tri-State's consolidated financial statements also include its undivided interests in jointly owned facilities. All significant intercompany balances and transactions have been eliminated in consolidation.</span></div><div style="margin-top:10pt;padding-left:18pt"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-style:italic;font-weight:400;line-height:120%">Accounting Pronouncement - Not Yet Adopted</span></div><div style="margin-top:10pt;text-indent:36pt"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%">In November 2024, the Financial Accounting Standards Board ("FASB") issued Accounting Standards Update ("ASU") 2024-03, Income Statement (Subtopic 220-40): Reporting Comprehensive Income - Expense Disaggregation Disclosures. This standard requires public business entities to disclose, in the notes to the financial statements, additional information about specified categories of expenses included in relevant expense captions presented on the face of the income statement. Required disclosures include amounts related to purchases of inventory, employee compensation, depreciation, intangible asset amortization and depletion for both annual and interim periods. In January 2025, the FASB issued ASU 2025-01 which clarified the effective dates of ASU 2024-03. The amendments are effective for annual reporting periods beginning after December 15, 2026, and interim reporting periods beginning after December 15, 2027. Tri-State is currently evaluating the impact of ASU 2024-03 on its consolidated financial statement disclosures. Because the amendments affect disclosure requirements only, Tri-State does not expect adoption to have an impact on its consolidated results of operations, financial position or cash flows. Tri-State expects to adopt the ASU 2024-03 disclosure requirements with its Annual Report on Form 10-K for the year ending December 31, 2027.</span></div><div style="margin-top:10pt;text-indent:36pt"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%">In December 2025, the FASB issued ASU 2025-10, Government Grants (Topic 832). ASU 2025-10 establishes authoritative guidance for the accounting and disclosure of government grants received by business entities. Under this amendment, a government grant is recognized when it is probable that the entity will comply with the conditions of the grant and that the grant will be received. Grants related to assets are recognized either as deferred income or as a reduction of the </span></div><div style="margin-top:10pt"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%">carrying amount of the related asset, while grants related to income are recognized in earnings either as other income or as a reduction of the related expense. ASU 2025-10 also establishes disclosure requirements intended to provide users of financial statements with information about the nature, terms and financial statement effects of government grants. ASU 2025-10 is</span></div><div><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%">effective for public business entities for annual periods beginning after December 15, 2028. Early adoption is permitted. Tri-</span></div><div><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%">State is evaluating the impact that adoption of ASU 2025-10 will have on its consolidated financial statements and related disclosures.</span></div><div style="margin-top:10pt;text-indent:36pt"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%">In May 2026, the FASB issued ASU 2026-02, Environmental Credits and Environmental Credit Obligations (Topic 818). ASU 2026-02 establishes a comprehensive accounting framework for the recognition, measurement, presentation and disclosure of environmental credits, such as renewable energy credits, and environmental credit obligations. The guidance requires environmental credits that meet specified criteria to be recognized as assets, while obligations that may be settled using environmental credits are recognized as liabilities. ASU 2026-02 also requires expanded qualitative and quantitative disclosures regarding the nature, use, valuation and settlement of environmental credits and related obligations. ASU 2026-02 is effective for public business entities for fiscal years beginning after December 15, 2027, including interim periods within those fiscal years. Tri-State is evaluating the effect of adopting ASU 2026-02 on its consolidated financial statements.</span></div> <div style="margin-top:10pt;padding-left:18pt"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-style:italic;font-weight:400;line-height:120%">Basis of Consolidation</span></div><div style="margin-top:10pt;text-indent:36pt"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%">Tri-State is a taxable wholesale electric power generation and transmission cooperative operating on a not-for-profit basis serving large portions of Colorado, Nebraska, New Mexico and Wyoming. Tri-State was incorporated under the laws of the State of Colorado in 1952. Tri-State has thirty-nine electric distribution member systems ("Utility Members") who are Class A - utility full requirements members to which it provides power pursuant to long-term wholesale electric service contracts. Tri-State has three non-utility members (“Non-Utility Members”). Tri-State's Class A Utility Members and Non-Utility Members are collectively referred to as its “Members.” </span></div><div style="margin-top:10pt;text-indent:36pt"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%">Tri-State provides wholesale power to its Utility Members at rates determined by its Board of Directors ("Board"), subject to FERC approval or acceptance. Rates are designed to recover all costs and provide margins to increase Utility Members' equity and to meet certain financial covenants, including a debt service ratio ("DSR") requirement and equity to capitalization ratio ("ECR") requirement.</span></div><div style="margin-top:10pt;text-indent:36pt"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%">The accompanying financial statements reflect the consolidated accounts of Tri-State, its wholly-owned and majority-owned subsidiaries, and certain variable interest entities for which Tri-State or its subsidiaries are the primary beneficiaries. See Note 17 – Variable Interest Entities. Tri-State's consolidated financial statements also include its undivided interests in jointly owned facilities. All significant intercompany balances and transactions have been eliminated in consolidation.</span></div> 39 3 <div style="margin-top:10pt;text-indent:36pt"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%">Tri-State complies with the Uniform System of Accounts as prescribed by FERC. In conformity with GAAP, the accounting policies and practices applied by Tri-State in the determination of rates are also employed for financial reporting purposes.</span></div> <div style="margin-top:10pt;padding-left:18pt"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-style:italic;font-weight:400;line-height:120%">Accounting Pronouncement - Not Yet Adopted</span></div><div style="margin-top:10pt;text-indent:36pt"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%">In November 2024, the Financial Accounting Standards Board ("FASB") issued Accounting Standards Update ("ASU") 2024-03, Income Statement (Subtopic 220-40): Reporting Comprehensive Income - Expense Disaggregation Disclosures. This standard requires public business entities to disclose, in the notes to the financial statements, additional information about specified categories of expenses included in relevant expense captions presented on the face of the income statement. Required disclosures include amounts related to purchases of inventory, employee compensation, depreciation, intangible asset amortization and depletion for both annual and interim periods. In January 2025, the FASB issued ASU 2025-01 which clarified the effective dates of ASU 2024-03. The amendments are effective for annual reporting periods beginning after December 15, 2026, and interim reporting periods beginning after December 15, 2027. Tri-State is currently evaluating the impact of ASU 2024-03 on its consolidated financial statement disclosures. Because the amendments affect disclosure requirements only, Tri-State does not expect adoption to have an impact on its consolidated results of operations, financial position or cash flows. Tri-State expects to adopt the ASU 2024-03 disclosure requirements with its Annual Report on Form 10-K for the year ending December 31, 2027.</span></div><div style="margin-top:10pt;text-indent:36pt"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%">In December 2025, the FASB issued ASU 2025-10, Government Grants (Topic 832). ASU 2025-10 establishes authoritative guidance for the accounting and disclosure of government grants received by business entities. Under this amendment, a government grant is recognized when it is probable that the entity will comply with the conditions of the grant and that the grant will be received. Grants related to assets are recognized either as deferred income or as a reduction of the </span></div><div style="margin-top:10pt"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%">carrying amount of the related asset, while grants related to income are recognized in earnings either as other income or as a reduction of the related expense. ASU 2025-10 also establishes disclosure requirements intended to provide users of financial statements with information about the nature, terms and financial statement effects of government grants. ASU 2025-10 is</span></div><div><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%">effective for public business entities for annual periods beginning after December 15, 2028. Early adoption is permitted. Tri-</span></div><div><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%">State is evaluating the impact that adoption of ASU 2025-10 will have on its consolidated financial statements and related disclosures.</span></div><div style="margin-top:10pt;text-indent:36pt"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%">In May 2026, the FASB issued ASU 2026-02, Environmental Credits and Environmental Credit Obligations (Topic 818). ASU 2026-02 establishes a comprehensive accounting framework for the recognition, measurement, presentation and disclosure of environmental credits, such as renewable energy credits, and environmental credit obligations. The guidance requires environmental credits that meet specified criteria to be recognized as assets, while obligations that may be settled using environmental credits are recognized as liabilities. ASU 2026-02 also requires expanded qualitative and quantitative disclosures regarding the nature, use, valuation and settlement of environmental credits and related obligations. ASU 2026-02 is effective for public business entities for fiscal years beginning after December 15, 2027, including interim periods within those fiscal years. Tri-State is evaluating the effect of adopting ASU 2026-02 on its consolidated financial statements.</span></div> ACCOUNTING FOR RATE REGULATION<div style="margin-top:10pt;text-indent:36pt"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%">In accordance with the accounting requirements related to regulated operations, some revenues and expenses have been deferred at the discretion of Tri-State's Board, subject to FERC approval, if based on regulatory orders or other available evidence, it is probable that these amounts will be refunded or recovered through future rates. Regulatory assets are costs that Tri-State expects to recover from its Utility Members based on rates approved by the applicable authority. Regulatory liabilities represent probable future reductions in rates associated with amounts that are expected to be refunded to the Utility Members based on rates approved by the applicable authority. Amounts that are no longer expected to be refunded to the Utility Members are recognized in margins. Tri-State recognizes regulatory assets as expenses and regulatory liabilities as operating revenue, other income, or a reduction in expense concurrent with their recovery through rates. Tri-State doesn't earn a rate of return on regulatory items.</span></div><div style="margin-top:10pt;text-indent:36pt"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%">Regulatory assets and liabilities are as follows (dollars in thousands):</span></div><div style="margin-top:5pt"><table style="border-collapse:collapse;display:inline-table;margin-bottom:5pt;vertical-align:text-bottom;width:100.000%"><tr><td style="width:1.0%"></td><td style="width:64.543%"></td><td style="width:0.1%"></td><td style="width:1.0%"></td><td style="width:15.712%"></td><td style="width:0.1%"></td><td style="width:0.1%"></td><td style="width:0.530%"></td><td style="width:0.1%"></td><td style="width:1.0%"></td><td style="width:15.715%"></td><td style="width:0.1%"></td></tr><tr><td colspan="3" style="padding:0 1pt"></td><td colspan="3" style="padding:1.5pt 1pt;text-align:center;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:700;line-height:100%">September 30,<br/>2026</span></td><td colspan="3" style="padding:0 1pt"></td><td colspan="3" style="padding:1.5pt 1pt;text-align:center;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:700;line-height:100%">December 31,<br/>2025</span></td></tr><tr><td colspan="3" style="background-color:#cceeff;padding:1.5pt 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:700;line-height:100%">Regulatory assets</span></td><td colspan="3" style="background-color:#cceeff;border-top:1pt solid #000000;padding:0 1pt"></td><td colspan="3" style="background-color:#cceeff;padding:0 1pt"></td><td colspan="3" style="background-color:#cceeff;border-top:1pt solid #000000;padding:0 1pt"></td></tr><tr><td colspan="3" style="background-color:#ffffff;padding:1.5pt 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">Deferred income tax expense (benefit) (1)</span></td><td style="background-color:#ffffff;padding:1.5pt 0 1.5pt 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">$</span></td><td style="background-color:#ffffff;padding:1.5pt 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">— </span></td><td style="background-color:#ffffff;padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"></td><td colspan="3" style="background-color:#ffffff;padding:0 1pt"></td><td style="background-color:#ffffff;padding:1.5pt 0 1.5pt 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">$</span></td><td style="background-color:#ffffff;padding:1.5pt 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">(254)</span></td><td style="background-color:#ffffff;padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"></td></tr><tr><td colspan="3" style="background-color:#cceeff;padding:1.5pt 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">Deferred prepaid lease expense – Springerville Unit 3 Lease (2)</span></td><td colspan="2" style="background-color:#cceeff;padding:1.5pt 0 1.5pt 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">68,252 </span></td><td style="background-color:#cceeff;padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"></td><td colspan="3" style="background-color:#cceeff;padding:0 1pt"></td><td colspan="2" style="background-color:#cceeff;padding:1.5pt 0 1.5pt 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">69,970 </span></td><td style="background-color:#cceeff;padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"></td></tr><tr><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td></tr><tr><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td></tr><tr><td colspan="3" style="background-color:#ffffff;padding:1.5pt 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">Deferred debt prepayment transaction costs (3)</span></td><td colspan="2" style="background-color:#ffffff;padding:1.5pt 0 1.5pt 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">82,689 </span></td><td style="background-color:#ffffff;padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"></td><td colspan="3" style="background-color:#ffffff;padding:0 1pt"></td><td colspan="2" style="background-color:#ffffff;padding:1.5pt 0 1.5pt 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">89,160 </span></td><td style="background-color:#ffffff;padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"></td></tr><tr><td colspan="3" style="background-color:#cceeff;padding:1.5pt 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">Deferred Holcomb expansion impairment loss (4)</span></td><td colspan="2" style="background-color:#cceeff;padding:1.5pt 0 1.5pt 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">61,940 </span></td><td style="background-color:#cceeff;padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"></td><td colspan="3" style="background-color:#cceeff;padding:0 1pt"></td><td colspan="2" style="background-color:#cceeff;padding:1.5pt 0 1.5pt 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">65,446 </span></td><td style="background-color:#cceeff;padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"></td></tr><tr><td colspan="3" style="background-color:#ffffff;padding:1.5pt 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">New Horizon Mine environmental obligation (5)</span></td><td colspan="2" style="background-color:#ffffff;padding:1.5pt 0 1.5pt 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">40,980 </span></td><td style="background-color:#ffffff;padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"></td><td colspan="3" style="background-color:#ffffff;padding:0 1pt"></td><td colspan="2" style="background-color:#ffffff;padding:1.5pt 0 1.5pt 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">42,326 </span></td><td style="background-color:#ffffff;padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"></td></tr><tr><td colspan="3" style="background-color:#cceeff;padding:1.5pt 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">Colowyo asset retirement and environmental remediation obligations (6)</span></td><td colspan="2" style="background-color:#cceeff;padding:1.5pt 0 1.5pt 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">72,427 </span></td><td style="background-color:#cceeff;padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"></td><td colspan="3" style="background-color:#cceeff;padding:0 1pt"></td><td colspan="2" style="background-color:#cceeff;padding:1.5pt 0 1.5pt 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">79,860 </span></td><td style="background-color:#cceeff;padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"></td></tr><tr><td colspan="3" style="background-color:#ffffff;padding:1.5pt 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">Unrecovered plant (7)</span></td><td colspan="2" style="background-color:#ffffff;padding:1.5pt 0 1.5pt 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">497,662 </span></td><td style="background-color:#ffffff;padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"></td><td colspan="3" style="background-color:#ffffff;padding:0 1pt"></td><td colspan="2" style="background-color:#ffffff;padding:1.5pt 0 1.5pt 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">507,250 </span></td><td style="background-color:#ffffff;padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"></td></tr><tr><td colspan="3" style="background-color:#cceeff;padding:1.5pt 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">Other</span></td><td colspan="2" style="background-color:#cceeff;padding:1.5pt 0 1.5pt 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">335 </span></td><td style="background-color:#cceeff;padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"></td><td colspan="3" style="background-color:#cceeff;padding:0 1pt"></td><td colspan="2" style="background-color:#cceeff;padding:1.5pt 0 1.5pt 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">76 </span></td><td style="background-color:#cceeff;padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"></td></tr><tr><td colspan="3" style="background-color:#ffffff;padding:1.5pt 1pt 1.5pt 7.75pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:700;line-height:100%">Total regulatory assets</span></td><td colspan="2" style="background-color:#ffffff;border-top:1pt solid #000;padding:1.5pt 0 1.5pt 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:700;line-height:100%">824,285</span><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%"> </span></td><td style="background-color:#ffffff;border-top:1pt solid #000;padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"></td><td colspan="3" style="background-color:#ffffff;padding:0 1pt"></td><td colspan="2" style="background-color:#ffffff;border-top:1pt solid #000;padding:1.5pt 0 1.5pt 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:700;line-height:100%">853,834</span><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%"> </span></td><td style="background-color:#ffffff;border-top:1pt solid #000;padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"></td></tr><tr style="height:14pt"><td colspan="3" style="background-color:#cceeff;padding:0 1pt"></td><td colspan="3" style="background-color:#cceeff;border-top:1pt solid #000;padding:0 1pt"></td><td colspan="3" style="background-color:#cceeff;padding:0 1pt"></td><td colspan="3" style="background-color:#cceeff;border-top:1pt solid #000;padding:0 1pt"></td></tr><tr><td colspan="3" style="background-color:#ffffff;padding:1.5pt 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:700;line-height:100%">Regulatory liabilities</span></td><td colspan="3" style="background-color:#ffffff;padding:0 1pt"></td><td colspan="3" style="background-color:#ffffff;padding:0 1pt"></td><td colspan="3" style="background-color:#ffffff;padding:0 1pt"></td></tr><tr><td colspan="3" style="background-color:#cceeff;padding:1.5pt 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">Interest rate swap - realized gain (8) </span></td><td colspan="2" style="background-color:#cceeff;padding:1.5pt 0 1.5pt 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">641 </span></td><td style="background-color:#cceeff;padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"></td><td colspan="3" style="background-color:#cceeff;padding:0 1pt"></td><td colspan="2" style="background-color:#cceeff;padding:1.5pt 0 1.5pt 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">924 </span></td><td style="background-color:#cceeff;padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"></td></tr><tr><td colspan="3" style="background-color:#ffffff;padding:1.5pt 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">Deferred income tax benefit (1)</span></td><td colspan="2" style="background-color:#ffffff;padding:1.5pt 0 1.5pt 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">3,503 </span></td><td style="background-color:#ffffff;padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"></td><td colspan="3" style="background-color:#ffffff;padding:0 1pt"></td><td colspan="2" style="background-color:#ffffff;padding:1.5pt 0 1.5pt 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">— </span></td><td style="background-color:#ffffff;padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"></td></tr><tr><td colspan="3" style="background-color:#cceeff;padding:1.5pt 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">Membership withdrawal (9)</span></td><td colspan="2" style="background-color:#cceeff;padding:1.5pt 0 1.5pt 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">99,104 </span></td><td style="background-color:#cceeff;padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"></td><td colspan="3" style="background-color:#cceeff;padding:0 1pt"></td><td colspan="2" style="background-color:#cceeff;padding:1.5pt 0 1.5pt 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">30,236 </span></td><td style="background-color:#cceeff;padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"></td></tr><tr><td colspan="3" style="background-color:#ffffff;padding:1.5pt 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">Withdrawal related transmission credit (10)</span></td><td colspan="2" style="background-color:#ffffff;padding:1.5pt 0 1.5pt 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">397,378 </span></td><td style="background-color:#ffffff;padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"></td><td colspan="3" style="background-color:#ffffff;padding:0 1pt"></td><td colspan="2" style="background-color:#ffffff;padding:1.5pt 0 1.5pt 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">315,786 </span></td><td style="background-color:#ffffff;padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"></td></tr><tr><td colspan="3" style="background-color:#cceeff;padding:1.5pt 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">Formula rate settlement (11)</span></td><td colspan="2" style="background-color:#cceeff;padding:1.5pt 0 1.5pt 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">10,115 </span></td><td style="background-color:#cceeff;padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"></td><td colspan="3" style="background-color:#cceeff;padding:0 1pt"></td><td colspan="2" style="background-color:#cceeff;padding:1.5pt 0 1.5pt 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">11,500 </span></td><td style="background-color:#cceeff;padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"></td></tr><tr><td colspan="3" style="background-color:#ffffff;padding:1.5pt 1pt 1.5pt 7.75pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:700;line-height:100%">Total regulatory liabilities</span></td><td colspan="2" style="background-color:#ffffff;border-top:1pt solid #000;padding:1.5pt 0 1.5pt 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:700;line-height:100%">510,741</span><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%"> </span></td><td style="background-color:#ffffff;border-top:1pt solid #000;padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"></td><td colspan="3" style="background-color:#ffffff;padding:0 1pt"></td><td colspan="2" style="background-color:#ffffff;border-top:1pt solid #000;padding:1.5pt 0 1.5pt 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:700;line-height:100%">358,446</span><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%"> </span></td><td style="background-color:#ffffff;border-top:1pt solid #000;padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"></td></tr><tr><td colspan="3" style="background-color:#cceeff;padding:1.5pt 1pt 1.5pt 12.25pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:700;line-height:100%">Net regulatory asset</span></td><td style="background-color:#cceeff;border-bottom:3pt double #000000;padding:1.5pt 0 1.5pt 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:700;line-height:100%">$</span></td><td style="background-color:#cceeff;border-bottom:3pt double #000000;padding:1.5pt 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:700;line-height:100%">313,544</span><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%"> </span></td><td style="background-color:#cceeff;border-bottom:3pt double #000000;padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"></td><td colspan="3" style="background-color:#cceeff;padding:0 1pt"></td><td style="background-color:#cceeff;border-bottom:3pt double #000000;padding:1.5pt 0 1.5pt 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:700;line-height:100%">$</span></td><td style="background-color:#cceeff;border-bottom:3pt double #000000;padding:1.5pt 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:700;line-height:100%">495,388</span><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%"> </span></td><td style="background-color:#cceeff;border-bottom:3pt double #000000;padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"></td></tr></table></div><div style="margin-top:12pt;padding-left:18pt;text-indent:-18pt"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%">(1)</span><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%;padding-left:6.34pt">A regulatory asset or liability associated with deferred income taxes generally represents the future increase or decrease in income taxes payable that will be received or settled through future rate revenues.</span></div><div style="padding-left:18pt;text-indent:-18pt"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%">(2)</span><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%;padding-left:6.34pt">Represents deferral of the loss on acquisition related to the Springerville Generating Station Unit 3 (“Springerville Unit 3”) prepaid lease expense upon acquiring a controlling interest in the Springerville Unit 3 Partnership LP (“Springerville </span></div><div style="padding-left:18pt"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%">Partnership”) in 2009. The regulatory asset for the deferred prepaid lease expense is being amortized to depreciation, amortization and depletion expense in the amount of $2.3 million annually through the 47-year period ending in 2056.</span></div><div style="padding-left:18pt;text-indent:-18pt"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%">(3)</span><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%;padding-left:6.34pt">Represents transaction costs incurred related to the prepayment of long-term debt in 2014. These costs are being amortized to depreciation, amortization and depletion expense in the amount of $8.6 million annually over the 21.4-year period ending in 2036.</span></div><div style="padding-left:18pt;text-indent:-18pt"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%">(4)</span><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%;padding-left:6.34pt">Represents deferral of the impairment loss related to development costs for the expansion of the Holcomb Generating Station. The regulatory asset for the deferred impairment loss is being amortized to depreciation, amortization and depletion expense in the amount of $4.7 million annually over the 20-year period ending in 2039.</span></div><div style="padding-left:18pt;text-indent:-18pt"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%">(5)</span><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%;padding-left:6.34pt">Represents $44.9 million of New Horizon Mine environmental obligation expense that was recognized as a regulatory item in 2023. The regulatory asset for the deferred environmental obligation expense is being amortized to depreciation, amortization and depletion expense in the amount of $1.8 million annually over 25 years ending in 2049.</span></div><div style="padding-left:18pt;text-indent:-18pt"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%">(6)</span><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%;padding-left:6.34pt">Represents deferral of net expenses from the Colowyo Mine asset retirement and environmental remediation obligations related to the transition from mining to full reclamation as of October 2025. The regulatory asset for the deferred Colowyo Mine asset retirement obligation expense is being amortized to depreciation, amortization and depletion expense in the amount of $4.0 million annually over 19 years, its original expected useful life, ending in 2044.</span></div><div style="padding-left:18pt;text-indent:-18pt"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%">(7)</span><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%;padding-left:6.34pt">Represents deferral of the impairment losses and other closure costs related to the early retirement of the Escalante, Rifle and Craig Generating Station Units 2 and 3. The deferred impairment loss for Escalante Generating Station is being amortized to depreciation, amortization and depletion expense in the amount of $12.2 million annually over the 25-year period ending in December 2045, which was the depreciable life of the Escalante Generating Station. The deferred impairment loss for Rifle Generating Station is being amortized to depreciation, amortization and depletion expense in the amount of $0.6 million annually through December 2028, which was the depreciable life of the Rifle Generating Station. Tri-State recognized the early retirement of Craig Station Units 2 and 3 which resulted in the recognition of an impairment loss of $261.6 million. The impairment loss was deferred in accordance with accounting for rate regulation. The deferred impairment loss will be amortized to depreciation, amortization and depletion expense beginning in October 2028 through 2039 for Craig Generating Station Unit 2 and January 2030 through 2043 for Craig Generating Station Unit 3. The annual amortization is expected to approximate the former annual Craig Generating Station Unit 2 and 3 depreciation for the remaining life of the asset.</span></div><div style="padding-left:18pt;text-indent:-18pt"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%">(8)</span><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%;padding-left:6.34pt">Represents deferral of a realized gain of $4.6 million related to the October 2017 settlement of a forward starting interest rate swap. This realized gain was deferred as a regulatory liability and is being amortized to interest expense over the 12–year term of the First Mortgage Obligations, Series 2017A and refunded to the Utility Members through reduced rates when recognized in future periods.</span></div><div style="padding-left:18pt;text-indent:-18pt"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%">(9)     Represents the remaining balance of the deferred recognition of other operating revenues related to the withdrawal of former Utility Members from membership in Tri-State. During the nine months ended September 30, 2026, $50.7 million was recognized in operating revenues as part of Tri-State's rate stabilization measures. See Note 13 - Revenue.</span></div><div style="padding-left:18pt;text-indent:-18pt"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%">(10) Represents the remaining amount of transmission credits from former Utility Members. A portion of withdrawing members' contract termination payments is deferred as a regulatory liability for future transmission service as required by Tri-State's contract termination payment tariff. The transmission credit, plus interest at FERC's prescribed interest rate, is credited on a straight-line amortized basis against the former Utility Member's bill for ongoing transmission service related to Tri-State. If the former Utility Member's transmission bill for a given month is lower than the credit due, the difference is forfeited by the former Utility Member and is recognized in other operating revenues on Tri-State's consolidated statement of operations. Certain elements of the transmission credit remain subject to ongoing proceedings.</span></div><div style="padding-left:18pt;text-indent:-18pt"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%">(11) Represents the settlement amount Tri-State has agreed to in the settlement agreement, which was accepted by FERC in December 2025, related to Tri-State's Class A wholesale rate schedule (A-41) and the unbundling of certain ancillary services with the Utility Members, net of amortization.</span></div> <div style="margin-top:10pt;text-indent:36pt"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%">Regulatory assets and liabilities are as follows (dollars in thousands):</span></div><div style="margin-top:5pt"><table style="border-collapse:collapse;display:inline-table;margin-bottom:5pt;vertical-align:text-bottom;width:100.000%"><tr><td style="width:1.0%"></td><td style="width:64.543%"></td><td style="width:0.1%"></td><td style="width:1.0%"></td><td style="width:15.712%"></td><td style="width:0.1%"></td><td style="width:0.1%"></td><td style="width:0.530%"></td><td style="width:0.1%"></td><td style="width:1.0%"></td><td style="width:15.715%"></td><td style="width:0.1%"></td></tr><tr><td colspan="3" style="padding:0 1pt"></td><td colspan="3" style="padding:1.5pt 1pt;text-align:center;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:700;line-height:100%">September 30,<br/>2026</span></td><td colspan="3" style="padding:0 1pt"></td><td colspan="3" style="padding:1.5pt 1pt;text-align:center;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:700;line-height:100%">December 31,<br/>2025</span></td></tr><tr><td colspan="3" style="background-color:#cceeff;padding:1.5pt 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:700;line-height:100%">Regulatory assets</span></td><td colspan="3" style="background-color:#cceeff;border-top:1pt solid #000000;padding:0 1pt"></td><td colspan="3" style="background-color:#cceeff;padding:0 1pt"></td><td colspan="3" style="background-color:#cceeff;border-top:1pt solid #000000;padding:0 1pt"></td></tr><tr><td colspan="3" style="background-color:#ffffff;padding:1.5pt 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">Deferred income tax expense (benefit) (1)</span></td><td style="background-color:#ffffff;padding:1.5pt 0 1.5pt 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">$</span></td><td style="background-color:#ffffff;padding:1.5pt 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">— </span></td><td style="background-color:#ffffff;padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"></td><td colspan="3" style="background-color:#ffffff;padding:0 1pt"></td><td style="background-color:#ffffff;padding:1.5pt 0 1.5pt 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">$</span></td><td style="background-color:#ffffff;padding:1.5pt 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">(254)</span></td><td style="background-color:#ffffff;padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"></td></tr><tr><td colspan="3" style="background-color:#cceeff;padding:1.5pt 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">Deferred prepaid lease expense – Springerville Unit 3 Lease (2)</span></td><td colspan="2" style="background-color:#cceeff;padding:1.5pt 0 1.5pt 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">68,252 </span></td><td style="background-color:#cceeff;padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"></td><td colspan="3" style="background-color:#cceeff;padding:0 1pt"></td><td colspan="2" style="background-color:#cceeff;padding:1.5pt 0 1.5pt 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">69,970 </span></td><td style="background-color:#cceeff;padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"></td></tr><tr><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td></tr><tr><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td></tr><tr><td colspan="3" style="background-color:#ffffff;padding:1.5pt 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">Deferred debt prepayment transaction costs (3)</span></td><td colspan="2" style="background-color:#ffffff;padding:1.5pt 0 1.5pt 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">82,689 </span></td><td style="background-color:#ffffff;padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"></td><td colspan="3" style="background-color:#ffffff;padding:0 1pt"></td><td colspan="2" style="background-color:#ffffff;padding:1.5pt 0 1.5pt 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">89,160 </span></td><td style="background-color:#ffffff;padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"></td></tr><tr><td colspan="3" style="background-color:#cceeff;padding:1.5pt 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">Deferred Holcomb expansion impairment loss (4)</span></td><td colspan="2" style="background-color:#cceeff;padding:1.5pt 0 1.5pt 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">61,940 </span></td><td style="background-color:#cceeff;padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"></td><td colspan="3" style="background-color:#cceeff;padding:0 1pt"></td><td colspan="2" style="background-color:#cceeff;padding:1.5pt 0 1.5pt 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">65,446 </span></td><td style="background-color:#cceeff;padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"></td></tr><tr><td colspan="3" style="background-color:#ffffff;padding:1.5pt 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">New Horizon Mine environmental obligation (5)</span></td><td colspan="2" style="background-color:#ffffff;padding:1.5pt 0 1.5pt 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">40,980 </span></td><td style="background-color:#ffffff;padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"></td><td colspan="3" style="background-color:#ffffff;padding:0 1pt"></td><td colspan="2" style="background-color:#ffffff;padding:1.5pt 0 1.5pt 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">42,326 </span></td><td style="background-color:#ffffff;padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"></td></tr><tr><td colspan="3" style="background-color:#cceeff;padding:1.5pt 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">Colowyo asset retirement and environmental remediation obligations (6)</span></td><td colspan="2" style="background-color:#cceeff;padding:1.5pt 0 1.5pt 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">72,427 </span></td><td style="background-color:#cceeff;padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"></td><td colspan="3" style="background-color:#cceeff;padding:0 1pt"></td><td colspan="2" style="background-color:#cceeff;padding:1.5pt 0 1.5pt 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">79,860 </span></td><td style="background-color:#cceeff;padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"></td></tr><tr><td colspan="3" style="background-color:#ffffff;padding:1.5pt 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">Unrecovered plant (7)</span></td><td colspan="2" style="background-color:#ffffff;padding:1.5pt 0 1.5pt 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">497,662 </span></td><td style="background-color:#ffffff;padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"></td><td colspan="3" style="background-color:#ffffff;padding:0 1pt"></td><td colspan="2" style="background-color:#ffffff;padding:1.5pt 0 1.5pt 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">507,250 </span></td><td style="background-color:#ffffff;padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"></td></tr><tr><td colspan="3" style="background-color:#cceeff;padding:1.5pt 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">Other</span></td><td colspan="2" style="background-color:#cceeff;padding:1.5pt 0 1.5pt 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">335 </span></td><td style="background-color:#cceeff;padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"></td><td colspan="3" style="background-color:#cceeff;padding:0 1pt"></td><td colspan="2" style="background-color:#cceeff;padding:1.5pt 0 1.5pt 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">76 </span></td><td style="background-color:#cceeff;padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"></td></tr><tr><td colspan="3" style="background-color:#ffffff;padding:1.5pt 1pt 1.5pt 7.75pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:700;line-height:100%">Total regulatory assets</span></td><td colspan="2" style="background-color:#ffffff;border-top:1pt solid #000;padding:1.5pt 0 1.5pt 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:700;line-height:100%">824,285</span><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%"> </span></td><td style="background-color:#ffffff;border-top:1pt solid #000;padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"></td><td colspan="3" style="background-color:#ffffff;padding:0 1pt"></td><td colspan="2" style="background-color:#ffffff;border-top:1pt solid #000;padding:1.5pt 0 1.5pt 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:700;line-height:100%">853,834</span><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%"> </span></td><td style="background-color:#ffffff;border-top:1pt solid #000;padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"></td></tr><tr style="height:14pt"><td colspan="3" style="background-color:#cceeff;padding:0 1pt"></td><td colspan="3" style="background-color:#cceeff;border-top:1pt solid #000;padding:0 1pt"></td><td colspan="3" style="background-color:#cceeff;padding:0 1pt"></td><td colspan="3" style="background-color:#cceeff;border-top:1pt solid #000;padding:0 1pt"></td></tr><tr><td colspan="3" style="background-color:#ffffff;padding:1.5pt 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:700;line-height:100%">Regulatory liabilities</span></td><td colspan="3" style="background-color:#ffffff;padding:0 1pt"></td><td colspan="3" style="background-color:#ffffff;padding:0 1pt"></td><td colspan="3" style="background-color:#ffffff;padding:0 1pt"></td></tr><tr><td colspan="3" style="background-color:#cceeff;padding:1.5pt 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">Interest rate swap - realized gain (8) </span></td><td colspan="2" style="background-color:#cceeff;padding:1.5pt 0 1.5pt 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">641 </span></td><td style="background-color:#cceeff;padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"></td><td colspan="3" style="background-color:#cceeff;padding:0 1pt"></td><td colspan="2" style="background-color:#cceeff;padding:1.5pt 0 1.5pt 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">924 </span></td><td style="background-color:#cceeff;padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"></td></tr><tr><td colspan="3" style="background-color:#ffffff;padding:1.5pt 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">Deferred income tax benefit (1)</span></td><td colspan="2" style="background-color:#ffffff;padding:1.5pt 0 1.5pt 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">3,503 </span></td><td style="background-color:#ffffff;padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"></td><td colspan="3" style="background-color:#ffffff;padding:0 1pt"></td><td colspan="2" style="background-color:#ffffff;padding:1.5pt 0 1.5pt 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">— </span></td><td style="background-color:#ffffff;padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"></td></tr><tr><td colspan="3" style="background-color:#cceeff;padding:1.5pt 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">Membership withdrawal (9)</span></td><td colspan="2" style="background-color:#cceeff;padding:1.5pt 0 1.5pt 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">99,104 </span></td><td style="background-color:#cceeff;padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"></td><td colspan="3" style="background-color:#cceeff;padding:0 1pt"></td><td colspan="2" style="background-color:#cceeff;padding:1.5pt 0 1.5pt 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">30,236 </span></td><td style="background-color:#cceeff;padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"></td></tr><tr><td colspan="3" style="background-color:#ffffff;padding:1.5pt 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">Withdrawal related transmission credit (10)</span></td><td colspan="2" style="background-color:#ffffff;padding:1.5pt 0 1.5pt 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">397,378 </span></td><td style="background-color:#ffffff;padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"></td><td colspan="3" style="background-color:#ffffff;padding:0 1pt"></td><td colspan="2" style="background-color:#ffffff;padding:1.5pt 0 1.5pt 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">315,786 </span></td><td style="background-color:#ffffff;padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"></td></tr><tr><td colspan="3" style="background-color:#cceeff;padding:1.5pt 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">Formula rate settlement (11)</span></td><td colspan="2" style="background-color:#cceeff;padding:1.5pt 0 1.5pt 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">10,115 </span></td><td style="background-color:#cceeff;padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"></td><td colspan="3" style="background-color:#cceeff;padding:0 1pt"></td><td colspan="2" style="background-color:#cceeff;padding:1.5pt 0 1.5pt 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">11,500 </span></td><td style="background-color:#cceeff;padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"></td></tr><tr><td colspan="3" style="background-color:#ffffff;padding:1.5pt 1pt 1.5pt 7.75pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:700;line-height:100%">Total regulatory liabilities</span></td><td colspan="2" style="background-color:#ffffff;border-top:1pt solid #000;padding:1.5pt 0 1.5pt 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:700;line-height:100%">510,741</span><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%"> </span></td><td style="background-color:#ffffff;border-top:1pt solid #000;padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"></td><td colspan="3" style="background-color:#ffffff;padding:0 1pt"></td><td colspan="2" style="background-color:#ffffff;border-top:1pt solid #000;padding:1.5pt 0 1.5pt 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:700;line-height:100%">358,446</span><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%"> </span></td><td style="background-color:#ffffff;border-top:1pt solid #000;padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"></td></tr><tr><td colspan="3" style="background-color:#cceeff;padding:1.5pt 1pt 1.5pt 12.25pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:700;line-height:100%">Net regulatory asset</span></td><td style="background-color:#cceeff;border-bottom:3pt double #000000;padding:1.5pt 0 1.5pt 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:700;line-height:100%">$</span></td><td style="background-color:#cceeff;border-bottom:3pt double #000000;padding:1.5pt 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:700;line-height:100%">313,544</span><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%"> </span></td><td style="background-color:#cceeff;border-bottom:3pt double #000000;padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"></td><td colspan="3" style="background-color:#cceeff;padding:0 1pt"></td><td style="background-color:#cceeff;border-bottom:3pt double #000000;padding:1.5pt 0 1.5pt 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:700;line-height:100%">$</span></td><td style="background-color:#cceeff;border-bottom:3pt double #000000;padding:1.5pt 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:700;line-height:100%">495,388</span><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%"> </span></td><td style="background-color:#cceeff;border-bottom:3pt double #000000;padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"></td></tr></table></div><div style="margin-top:12pt;padding-left:18pt;text-indent:-18pt"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%">(1)</span><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%;padding-left:6.34pt">A regulatory asset or liability associated with deferred income taxes generally represents the future increase or decrease in income taxes payable that will be received or settled through future rate revenues.</span></div><div style="padding-left:18pt;text-indent:-18pt"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%">(2)</span><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%;padding-left:6.34pt">Represents deferral of the loss on acquisition related to the Springerville Generating Station Unit 3 (“Springerville Unit 3”) prepaid lease expense upon acquiring a controlling interest in the Springerville Unit 3 Partnership LP (“Springerville </span></div><div style="padding-left:18pt"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%">Partnership”) in 2009. The regulatory asset for the deferred prepaid lease expense is being amortized to depreciation, amortization and depletion expense in the amount of $2.3 million annually through the 47-year period ending in 2056.</span></div><div style="padding-left:18pt;text-indent:-18pt"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%">(3)</span><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%;padding-left:6.34pt">Represents transaction costs incurred related to the prepayment of long-term debt in 2014. These costs are being amortized to depreciation, amortization and depletion expense in the amount of $8.6 million annually over the 21.4-year period ending in 2036.</span></div><div style="padding-left:18pt;text-indent:-18pt"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%">(4)</span><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%;padding-left:6.34pt">Represents deferral of the impairment loss related to development costs for the expansion of the Holcomb Generating Station. The regulatory asset for the deferred impairment loss is being amortized to depreciation, amortization and depletion expense in the amount of $4.7 million annually over the 20-year period ending in 2039.</span></div><div style="padding-left:18pt;text-indent:-18pt"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%">(5)</span><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%;padding-left:6.34pt">Represents $44.9 million of New Horizon Mine environmental obligation expense that was recognized as a regulatory item in 2023. The regulatory asset for the deferred environmental obligation expense is being amortized to depreciation, amortization and depletion expense in the amount of $1.8 million annually over 25 years ending in 2049.</span></div><div style="padding-left:18pt;text-indent:-18pt"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%">(6)</span><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%;padding-left:6.34pt">Represents deferral of net expenses from the Colowyo Mine asset retirement and environmental remediation obligations related to the transition from mining to full reclamation as of October 2025. The regulatory asset for the deferred Colowyo Mine asset retirement obligation expense is being amortized to depreciation, amortization and depletion expense in the amount of $4.0 million annually over 19 years, its original expected useful life, ending in 2044.</span></div><div style="padding-left:18pt;text-indent:-18pt"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%">(7)</span><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%;padding-left:6.34pt">Represents deferral of the impairment losses and other closure costs related to the early retirement of the Escalante, Rifle and Craig Generating Station Units 2 and 3. The deferred impairment loss for Escalante Generating Station is being amortized to depreciation, amortization and depletion expense in the amount of $12.2 million annually over the 25-year period ending in December 2045, which was the depreciable life of the Escalante Generating Station. The deferred impairment loss for Rifle Generating Station is being amortized to depreciation, amortization and depletion expense in the amount of $0.6 million annually through December 2028, which was the depreciable life of the Rifle Generating Station. Tri-State recognized the early retirement of Craig Station Units 2 and 3 which resulted in the recognition of an impairment loss of $261.6 million. The impairment loss was deferred in accordance with accounting for rate regulation. The deferred impairment loss will be amortized to depreciation, amortization and depletion expense beginning in October 2028 through 2039 for Craig Generating Station Unit 2 and January 2030 through 2043 for Craig Generating Station Unit 3. The annual amortization is expected to approximate the former annual Craig Generating Station Unit 2 and 3 depreciation for the remaining life of the asset.</span></div><div style="padding-left:18pt;text-indent:-18pt"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%">(8)</span><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%;padding-left:6.34pt">Represents deferral of a realized gain of $4.6 million related to the October 2017 settlement of a forward starting interest rate swap. This realized gain was deferred as a regulatory liability and is being amortized to interest expense over the 12–year term of the First Mortgage Obligations, Series 2017A and refunded to the Utility Members through reduced rates when recognized in future periods.</span></div><div style="padding-left:18pt;text-indent:-18pt"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%">(9)     Represents the remaining balance of the deferred recognition of other operating revenues related to the withdrawal of former Utility Members from membership in Tri-State. During the nine months ended September 30, 2026, $50.7 million was recognized in operating revenues as part of Tri-State's rate stabilization measures. See Note 13 - Revenue.</span></div><div style="padding-left:18pt;text-indent:-18pt"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%">(10) Represents the remaining amount of transmission credits from former Utility Members. A portion of withdrawing members' contract termination payments is deferred as a regulatory liability for future transmission service as required by Tri-State's contract termination payment tariff. The transmission credit, plus interest at FERC's prescribed interest rate, is credited on a straight-line amortized basis against the former Utility Member's bill for ongoing transmission service related to Tri-State. If the former Utility Member's transmission bill for a given month is lower than the credit due, the difference is forfeited by the former Utility Member and is recognized in other operating revenues on Tri-State's consolidated statement of operations. Certain elements of the transmission credit remain subject to ongoing proceedings.</span></div><div style="padding-left:18pt;text-indent:-18pt"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%">(11) Represents the settlement amount Tri-State has agreed to in the settlement agreement, which was accepted by FERC in December 2025, related to Tri-State's Class A wholesale rate schedule (A-41) and the unbundling of certain ancillary services with the Utility Members, net of amortization.</span></div> 0 -254000 68252000 69970000 82689000 89160000 61940000 65446000 40980000 42326000 72427000 79860000 497662000 507250000 335000 76000 824285000 853834000 641000 924000 3503000 0 99104000 30236000 397378000 315786000 10115000 11500000 510741000 358446000 313544000 495388000 2300000 P47Y 8600000 P21Y4M24D 4700000 P20Y 44900000 1800000 P25Y 4000000.0 P19Y 12200000 P25Y 600000 261600000 4600000 P12Y 50700000 PROPERTY, PLANT AND EQUIPMENT<div style="margin-top:10pt;text-indent:36pt"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%">Tri-State's property, plant and equipment on its consolidated statements of financial position consists of electric plant and other plant. </span></div><div style="margin-top:10pt;text-indent:36pt"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:700;line-height:120%">ELECTRIC PLANT</span><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%">:  As of September 30, 2026, Tri-State's investment in electric plant and the related annual rates of depreciation or amortization calculated using the straight‑line method are as follows (dollars in thousands):</span></div><div style="margin-top:5pt"><table style="border-collapse:collapse;display:inline-table;margin-bottom:5pt;vertical-align:text-bottom;width:100.000%"><tr><td style="width:1.0%"></td><td style="width:36.765%"></td><td style="width:0.1%"></td><td style="width:1.0%"></td><td style="width:7.087%"></td><td style="width:0.1%"></td><td style="width:0.1%"></td><td style="width:0.530%"></td><td style="width:0.1%"></td><td style="width:1.0%"></td><td style="width:2.847%"></td><td style="width:0.1%"></td><td style="width:0.1%"></td><td style="width:0.530%"></td><td style="width:0.1%"></td><td style="width:1.0%"></td><td style="width:7.087%"></td><td style="width:0.1%"></td><td style="width:0.1%"></td><td style="width:0.530%"></td><td style="width:0.1%"></td><td style="width:1.0%"></td><td style="width:11.619%"></td><td style="width:0.1%"></td><td style="width:0.1%"></td><td style="width:0.530%"></td><td style="width:0.1%"></td><td style="width:1.0%"></td><td style="width:11.619%"></td><td style="width:0.1%"></td><td style="width:0.1%"></td><td style="width:0.530%"></td><td style="width:0.1%"></td><td style="width:1.0%"></td><td style="width:11.626%"></td><td style="width:0.1%"></td></tr><tr><td colspan="3" style="padding:0 1pt"></td><td colspan="15" style="padding:1.5pt 1pt;text-align:center;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:8pt;font-weight:700;line-height:120%">Annual Depreciation Rate</span></td><td colspan="3" style="padding:0 1pt"></td><td colspan="3" style="padding:1.5pt 1pt;text-align:center;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:8pt;font-weight:700;line-height:120%">Plant In<br/>Service</span></td><td colspan="3" style="padding:0 1pt"></td><td colspan="3" style="padding:1.5pt 1pt;text-align:center;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:8pt;font-weight:700;line-height:120%">Accumulated<br/>Depreciation</span></td><td colspan="3" style="padding:0 1pt"></td><td colspan="3" style="padding:1.5pt 1pt;text-align:center;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:8pt;font-weight:700;line-height:120%">Net Book<br/>Value</span></td></tr><tr><td colspan="3" style="background-color:#cceeff;padding:1.5pt 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%">Generation plant</span></td><td colspan="2" style="background-color:#cceeff;border-top:1pt solid #000000;padding:1.5pt 0 1.5pt 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%">1.14 </span></td><td style="background-color:#cceeff;border-top:1pt solid #000000;padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%">%</span></td><td colspan="3" style="background-color:#cceeff;border-top:1pt solid #000000;padding:0 1pt"></td><td colspan="3" style="background-color:#cceeff;border-top:1pt solid #000000;padding:1.5pt 1pt;text-align:center;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%">to</span></td><td colspan="3" style="background-color:#cceeff;border-top:1pt solid #000000;padding:0 1pt"></td><td colspan="2" style="background-color:#cceeff;border-top:1pt solid #000000;padding:1.5pt 0 1.5pt 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%">4.14 </span></td><td style="background-color:#cceeff;border-top:1pt solid #000000;padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%">%</span></td><td colspan="3" style="background-color:#cceeff;padding:0 1pt"></td><td style="background-color:#cceeff;border-top:1pt solid #000000;padding:1.5pt 0 1.5pt 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%">$</span></td><td style="background-color:#cceeff;border-top:1pt solid #000000;padding:1.5pt 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%">3,367,291 </span></td><td style="background-color:#cceeff;border-top:1pt solid #000000;padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"></td><td colspan="3" style="background-color:#cceeff;padding:0 1pt"></td><td style="background-color:#cceeff;border-top:1pt solid #000000;padding:1.5pt 0 1.5pt 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%">$</span></td><td style="background-color:#cceeff;border-top:1pt solid #000000;padding:1.5pt 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%">(1,908,476)</span></td><td style="background-color:#cceeff;border-top:1pt solid #000000;padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"></td><td colspan="3" style="background-color:#cceeff;padding:0 1pt"></td><td style="background-color:#cceeff;border-top:1pt solid #000000;padding:1.5pt 0 1.5pt 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%">$</span></td><td style="background-color:#cceeff;border-top:1pt solid #000000;padding:1.5pt 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%">1,458,815 </span></td><td style="background-color:#cceeff;border-top:1pt solid #000000;padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"></td></tr><tr><td colspan="3" style="padding:1.5pt 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%">Transmission plant</span></td><td colspan="2" style="padding:1.5pt 0 1.5pt 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%">1.17 </span></td><td style="padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%">%</span></td><td colspan="3" style="padding:0 1pt"></td><td colspan="3" style="padding:1.5pt 1pt;text-align:center;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%">to</span></td><td colspan="3" style="padding:0 1pt"></td><td colspan="2" style="padding:1.5pt 0 1.5pt 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%">1.84 </span></td><td style="padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%">%</span></td><td colspan="3" style="padding:0 1pt"></td><td colspan="2" style="padding:1.5pt 0 1.5pt 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%">2,254,630 </span></td><td style="padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"></td><td colspan="3" style="padding:0 1pt"></td><td colspan="2" style="padding:1.5pt 0 1.5pt 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%">(839,831)</span></td><td style="padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"></td><td colspan="3" style="padding:0 1pt"></td><td colspan="2" style="padding:1.5pt 0 1.5pt 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%">1,414,799 </span></td><td style="padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"></td></tr><tr><td colspan="3" style="background-color:#cceeff;padding:1.5pt 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%">General plant</span></td><td colspan="2" style="background-color:#cceeff;padding:1.5pt 0 1.5pt 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%">1.20 </span></td><td style="background-color:#cceeff;padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%">%</span></td><td colspan="3" style="background-color:#cceeff;padding:0 1pt"></td><td colspan="3" style="background-color:#cceeff;padding:1.5pt 1pt;text-align:center;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%">to</span></td><td colspan="3" style="background-color:#cceeff;padding:0 1pt"></td><td colspan="2" style="background-color:#cceeff;padding:1.5pt 0 1.5pt 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%">11.60 </span></td><td style="background-color:#cceeff;padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%">%</span></td><td colspan="3" style="background-color:#cceeff;padding:0 1pt"></td><td colspan="2" style="background-color:#cceeff;padding:1.5pt 0 1.5pt 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%">278,372 </span></td><td style="background-color:#cceeff;padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"></td><td colspan="3" style="background-color:#cceeff;padding:0 1pt"></td><td colspan="2" style="background-color:#cceeff;padding:1.5pt 0 1.5pt 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%">(151,543)</span></td><td style="background-color:#cceeff;padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"></td><td colspan="3" style="background-color:#cceeff;padding:0 1pt"></td><td colspan="2" style="background-color:#cceeff;padding:1.5pt 0 1.5pt 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%">126,829 </span></td><td style="background-color:#cceeff;padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"></td></tr><tr><td colspan="3" style="padding:1.5pt 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%">Other</span></td><td colspan="2" style="padding:1.5pt 0 1.5pt 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%">2.75 </span></td><td style="padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%">%</span></td><td colspan="3" style="padding:0 1pt"></td><td colspan="3" style="padding:1.5pt 1pt;text-align:center;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%">to</span></td><td colspan="3" style="padding:0 1pt"></td><td colspan="2" style="padding:1.5pt 0 1.5pt 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%">10.00 </span></td><td style="padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%">%</span></td><td colspan="3" style="padding:0 1pt"></td><td colspan="2" style="padding:1.5pt 0 1.5pt 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%">249,213 </span></td><td style="padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"></td><td colspan="3" style="padding:0 1pt"></td><td colspan="2" style="padding:1.5pt 0 1.5pt 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%">(105,590)</span></td><td style="padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"></td><td colspan="3" style="padding:0 1pt"></td><td colspan="2" style="padding:1.5pt 0 1.5pt 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%">143,623 </span></td><td style="padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"></td></tr><tr><td colspan="3" style="background-color:#cceeff;padding:1.5pt 1pt 1.5pt 12.25pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:700;line-height:120%">Electric plant in service (at cost)</span></td><td colspan="3" style="background-color:#cceeff;padding:0 1pt"></td><td colspan="3" style="background-color:#cceeff;padding:0 1pt"></td><td colspan="3" style="background-color:#cceeff;padding:0 1pt"></td><td colspan="3" style="background-color:#cceeff;padding:0 1pt"></td><td colspan="3" style="background-color:#cceeff;padding:0 1pt"></td><td colspan="3" style="background-color:#cceeff;padding:0 1pt"></td><td style="background-color:#cceeff;border-top:1pt solid #000000;padding:1.5pt 0 1.5pt 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:700;line-height:120%">$</span></td><td style="background-color:#cceeff;border-top:1pt solid #000000;padding:1.5pt 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:700;line-height:120%">6,149,506</span><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%"> </span></td><td style="background-color:#cceeff;border-top:1pt solid #000000;padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"></td><td colspan="3" style="background-color:#cceeff;padding:0 1pt"></td><td style="background-color:#cceeff;border-top:1pt solid #000000;padding:1.5pt 0 1.5pt 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:700;line-height:120%">$</span></td><td style="background-color:#cceeff;border-top:1pt solid #000000;padding:1.5pt 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:700;line-height:120%">(3,005,440)</span></td><td style="background-color:#cceeff;border-top:1pt solid #000000;padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"></td><td colspan="3" style="background-color:#cceeff;padding:0 1pt"></td><td colspan="2" style="background-color:#cceeff;border-top:1pt solid #000000;padding:1.5pt 0 1.5pt 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:700;line-height:120%">3,144,066</span><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%"> </span></td><td style="background-color:#cceeff;border-top:1pt solid #000000;padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"></td></tr><tr><td colspan="3" style="padding:1.5pt 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%">Construction work in progress</span></td><td colspan="3" style="padding:0 1pt"></td><td colspan="3" style="padding:0 1pt"></td><td colspan="3" style="padding:0 1pt"></td><td colspan="3" style="padding:0 1pt"></td><td colspan="3" style="padding:0 1pt"></td><td colspan="3" style="padding:0 1pt"></td><td colspan="3" style="border-top:3pt double #000000;padding:0 1pt"></td><td colspan="3" style="padding:0 1pt"></td><td colspan="3" style="border-top:3pt double #000000;padding:0 1pt"></td><td colspan="3" style="padding:0 1pt"></td><td colspan="2" style="padding:1.5pt 0 1.5pt 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%">197,543 </span></td><td style="padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"></td></tr><tr><td colspan="3" style="background-color:#cceeff;padding:1.5pt 1pt 1.5pt 12.25pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:700;line-height:120%">Electric plant</span></td><td colspan="3" style="background-color:#cceeff;padding:0 1pt"></td><td colspan="3" style="background-color:#cceeff;padding:0 1pt"></td><td colspan="3" style="background-color:#cceeff;padding:0 1pt"></td><td colspan="3" style="background-color:#cceeff;padding:0 1pt"></td><td colspan="3" style="background-color:#cceeff;padding:0 1pt"></td><td colspan="3" style="background-color:#cceeff;padding:0 1pt"></td><td colspan="3" style="background-color:#cceeff;padding:0 1pt"></td><td colspan="3" style="background-color:#cceeff;padding:0 1pt"></td><td colspan="3" style="background-color:#cceeff;padding:0 1pt"></td><td colspan="3" style="background-color:#cceeff;padding:0 1pt"></td><td style="background-color:#cceeff;border-bottom:3pt double #000000;border-top:1pt solid #000000;padding:1.5pt 0 1.5pt 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:700;line-height:120%">$</span></td><td style="background-color:#cceeff;border-bottom:3pt double #000000;border-top:1pt solid #000000;padding:1.5pt 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:700;line-height:120%">3,341,609</span><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%"> </span></td><td style="background-color:#cceeff;border-bottom:3pt double #000000;border-top:1pt solid #000000;padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"></td></tr></table></div><div style="text-indent:36pt"><span><br/></span></div><div style="margin-top:10pt;text-indent:36pt"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%">As of December 31, 2025, Tri-State's investment in electric plant and the related annual rates of depreciation or amortization calculated using the straight‑line method are as follows (dollars in thousands):</span></div><div style="margin-top:5pt"><table style="border-collapse:collapse;display:inline-table;margin-bottom:5pt;vertical-align:text-bottom;width:99.853%"><tr><td style="width:1.0%"></td><td style="width:36.381%"></td><td style="width:0.1%"></td><td style="width:1.0%"></td><td style="width:7.245%"></td><td style="width:0.1%"></td><td style="width:0.1%"></td><td style="width:0.532%"></td><td style="width:0.1%"></td><td style="width:1.0%"></td><td style="width:2.853%"></td><td style="width:0.1%"></td><td style="width:0.1%"></td><td style="width:0.532%"></td><td style="width:0.1%"></td><td style="width:1.0%"></td><td style="width:7.245%"></td><td style="width:0.1%"></td><td style="width:0.1%"></td><td style="width:0.532%"></td><td style="width:0.1%"></td><td style="width:1.0%"></td><td style="width:11.637%"></td><td style="width:0.1%"></td><td style="width:0.1%"></td><td style="width:0.532%"></td><td style="width:0.1%"></td><td style="width:1.0%"></td><td style="width:11.637%"></td><td style="width:0.1%"></td><td style="width:0.1%"></td><td style="width:0.532%"></td><td style="width:0.1%"></td><td style="width:1.0%"></td><td style="width:11.642%"></td><td style="width:0.1%"></td></tr><tr><td colspan="3" style="padding:0 1pt"></td><td colspan="15" style="padding:1.5pt 1pt;text-align:center;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:8pt;font-weight:700;line-height:120%">Annual Depreciation Rate</span></td><td colspan="3" style="padding:0 1pt"></td><td colspan="3" style="padding:1.5pt 1pt;text-align:center;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:8pt;font-weight:700;line-height:120%">Plant In<br/>Service</span></td><td colspan="3" style="padding:0 1pt"></td><td colspan="3" style="padding:1.5pt 1pt;text-align:center;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:8pt;font-weight:700;line-height:120%">Accumulated<br/>Depreciation</span></td><td colspan="3" style="padding:0 1pt"></td><td colspan="3" style="padding:1.5pt 1pt;text-align:center;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:8pt;font-weight:700;line-height:120%">Net Book<br/>Value</span></td></tr><tr><td colspan="3" style="background-color:#cceeff;padding:1.5pt 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%">Generation plant</span></td><td colspan="2" style="background-color:#cceeff;border-top:1pt solid #000000;padding:1.5pt 0 1.5pt 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%">1.14 </span></td><td style="background-color:#cceeff;border-top:1pt solid #000000;padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%">%</span></td><td colspan="3" style="background-color:#cceeff;border-top:1pt solid #000000;padding:0 1pt"></td><td colspan="3" style="background-color:#cceeff;border-top:1pt solid #000000;padding:1.5pt 1pt;text-align:center;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%">to</span></td><td colspan="3" style="background-color:#cceeff;border-top:1pt solid #000000;padding:0 1pt"></td><td colspan="2" style="background-color:#cceeff;border-top:1pt solid #000000;padding:1.5pt 0 1.5pt 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%">4.14 </span></td><td style="background-color:#cceeff;border-top:1pt solid #000000;padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%">%</span></td><td colspan="3" style="background-color:#cceeff;padding:0 1pt"></td><td style="background-color:#cceeff;border-top:1pt solid #000000;padding:1.5pt 0 1.5pt 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%">$</span></td><td style="background-color:#cceeff;border-top:1pt solid #000000;padding:1.5pt 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%">3,375,766 </span></td><td style="background-color:#cceeff;border-top:1pt solid #000000;padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"></td><td colspan="3" style="background-color:#cceeff;padding:0 1pt"></td><td style="background-color:#cceeff;border-top:1pt solid #000000;padding:1.5pt 0 1.5pt 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%">$</span></td><td style="background-color:#cceeff;border-top:1pt solid #000000;padding:1.5pt 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%">(1,836,220)</span></td><td style="background-color:#cceeff;border-top:1pt solid #000000;padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"></td><td colspan="3" style="background-color:#cceeff;padding:0 1pt"></td><td style="background-color:#cceeff;border-top:1pt solid #000000;padding:1.5pt 0 1.5pt 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%">$</span></td><td style="background-color:#cceeff;border-top:1pt solid #000000;padding:1.5pt 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%">1,539,546 </span></td><td style="background-color:#cceeff;border-top:1pt solid #000000;padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"></td></tr><tr><td colspan="3" style="padding:1.5pt 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%">Transmission plant</span></td><td colspan="2" style="padding:1.5pt 0 1.5pt 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%">1.17 </span></td><td style="padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%">%</span></td><td colspan="3" style="padding:0 1pt"></td><td colspan="3" style="padding:1.5pt 1pt;text-align:center;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%">to</span></td><td colspan="3" style="padding:0 1pt"></td><td colspan="2" style="padding:1.5pt 0 1.5pt 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%">1.84 </span></td><td style="padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%">%</span></td><td colspan="3" style="padding:0 1pt"></td><td colspan="2" style="padding:1.5pt 0 1.5pt 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%">2,174,345 </span></td><td style="padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"></td><td colspan="3" style="padding:0 1pt"></td><td colspan="2" style="padding:1.5pt 0 1.5pt 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%">(828,367)</span></td><td style="padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"></td><td colspan="3" style="padding:0 1pt"></td><td colspan="2" style="padding:1.5pt 0 1.5pt 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%">1,345,978 </span></td><td style="padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"></td></tr><tr><td colspan="3" style="background-color:#cceeff;padding:1.5pt 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%">General plant</span></td><td colspan="2" style="background-color:#cceeff;padding:1.5pt 0 1.5pt 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%">1.20 </span></td><td style="background-color:#cceeff;padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%">%</span></td><td colspan="3" style="background-color:#cceeff;padding:0 1pt"></td><td colspan="3" style="background-color:#cceeff;padding:1.5pt 1pt;text-align:center;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%">to</span></td><td colspan="3" style="background-color:#cceeff;padding:0 1pt"></td><td colspan="2" style="background-color:#cceeff;padding:1.5pt 0 1.5pt 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%">11.60 </span></td><td style="background-color:#cceeff;padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%">%</span></td><td colspan="3" style="background-color:#cceeff;padding:0 1pt"></td><td colspan="2" style="background-color:#cceeff;padding:1.5pt 0 1.5pt 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%">278,735 </span></td><td style="background-color:#cceeff;padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"></td><td colspan="3" style="background-color:#cceeff;padding:0 1pt"></td><td colspan="2" style="background-color:#cceeff;padding:1.5pt 0 1.5pt 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%">(146,589)</span></td><td style="background-color:#cceeff;padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"></td><td colspan="3" style="background-color:#cceeff;padding:0 1pt"></td><td colspan="2" style="background-color:#cceeff;padding:1.5pt 0 1.5pt 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%">132,146 </span></td><td style="background-color:#cceeff;padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"></td></tr><tr><td colspan="3" style="padding:1.5pt 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%">Other</span></td><td colspan="2" style="padding:1.5pt 0 1.5pt 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%">2.75 </span></td><td style="padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%">%</span></td><td colspan="3" style="padding:0 1pt"></td><td colspan="3" style="padding:1.5pt 1pt;text-align:center;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%">to</span></td><td colspan="3" style="padding:0 1pt"></td><td colspan="2" style="padding:1.5pt 0 1.5pt 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%">10.00 </span></td><td style="padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%">%</span></td><td colspan="3" style="padding:0 1pt"></td><td colspan="2" style="padding:1.5pt 0 1.5pt 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%">246,445 </span></td><td style="padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"></td><td colspan="3" style="padding:0 1pt"></td><td colspan="2" style="padding:1.5pt 0 1.5pt 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%">(102,531)</span></td><td style="padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"></td><td colspan="3" style="padding:0 1pt"></td><td colspan="2" style="padding:1.5pt 0 1.5pt 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%">143,914 </span></td><td style="padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"></td></tr><tr><td colspan="3" style="background-color:#cceeff;padding:1.5pt 1pt 1.5pt 12.25pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:700;line-height:120%">Electric plant in service (at cost)</span></td><td colspan="3" style="background-color:#cceeff;padding:0 1pt"></td><td colspan="3" style="background-color:#cceeff;padding:0 1pt"></td><td colspan="3" style="background-color:#cceeff;padding:0 1pt"></td><td colspan="3" style="background-color:#cceeff;padding:0 1pt"></td><td colspan="3" style="background-color:#cceeff;padding:0 1pt"></td><td colspan="3" style="background-color:#cceeff;padding:0 1pt"></td><td style="background-color:#cceeff;border-top:1pt solid #000000;padding:1.5pt 0 1.5pt 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:700;line-height:120%">$</span></td><td style="background-color:#cceeff;border-top:1pt solid #000000;padding:1.5pt 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:700;line-height:120%">6,075,291</span><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%"> </span></td><td style="background-color:#cceeff;border-top:1pt solid #000000;padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"></td><td colspan="3" style="background-color:#cceeff;padding:0 1pt"></td><td style="background-color:#cceeff;border-top:1pt solid #000000;padding:1.5pt 0 1.5pt 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:700;line-height:120%">$</span></td><td style="background-color:#cceeff;border-top:1pt solid #000000;padding:1.5pt 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:700;line-height:120%">(2,913,707)</span></td><td style="background-color:#cceeff;border-top:1pt solid #000000;padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"></td><td colspan="3" style="background-color:#cceeff;padding:0 1pt"></td><td colspan="2" style="background-color:#cceeff;border-top:1pt solid #000000;padding:1.5pt 0 1.5pt 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:700;line-height:120%">3,161,584</span><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%"> </span></td><td style="background-color:#cceeff;border-top:1pt solid #000000;padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"></td></tr><tr><td colspan="3" style="padding:1.5pt 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%">Construction work in progress</span></td><td colspan="3" style="padding:0 1pt"></td><td colspan="3" style="padding:0 1pt"></td><td colspan="3" style="padding:0 1pt"></td><td colspan="3" style="padding:0 1pt"></td><td colspan="3" style="padding:0 1pt"></td><td colspan="3" style="padding:0 1pt"></td><td colspan="3" style="border-top:3pt double #000000;padding:0 1pt"></td><td colspan="3" style="padding:0 1pt"></td><td colspan="3" style="border-top:3pt double #000000;padding:0 1pt"></td><td colspan="3" style="padding:0 1pt"></td><td colspan="2" style="padding:1.5pt 0 1.5pt 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%">143,940 </span></td><td style="padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"></td></tr><tr><td colspan="3" style="background-color:#cceeff;padding:1.5pt 1pt 1.5pt 12.25pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:700;line-height:120%">Electric plant</span></td><td colspan="3" style="background-color:#cceeff;padding:0 1pt"></td><td colspan="3" style="background-color:#cceeff;padding:0 1pt"></td><td colspan="3" style="background-color:#cceeff;padding:0 1pt"></td><td colspan="3" style="background-color:#cceeff;padding:0 1pt"></td><td colspan="3" style="background-color:#cceeff;padding:0 1pt"></td><td colspan="3" style="background-color:#cceeff;padding:0 1pt"></td><td colspan="3" style="background-color:#cceeff;padding:0 1pt"></td><td colspan="3" style="background-color:#cceeff;padding:0 1pt"></td><td colspan="3" style="background-color:#cceeff;padding:0 1pt"></td><td colspan="3" style="background-color:#cceeff;padding:0 1pt"></td><td style="background-color:#cceeff;border-bottom:3pt double #000000;border-top:1pt solid #000000;padding:1.5pt 0 1.5pt 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:700;line-height:120%">$</span></td><td style="background-color:#cceeff;border-bottom:3pt double #000000;border-top:1pt solid #000000;padding:1.5pt 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:700;line-height:120%">3,305,524</span><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%"> </span></td><td style="background-color:#cceeff;border-bottom:3pt double #000000;border-top:1pt solid #000000;padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"></td></tr></table></div><div style="margin-top:10pt;text-indent:36pt"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:700;line-height:120%">JOINTLY OWNED FACILITIES</span><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%">:  Tri-State's share in each jointly owned facility is as follows as of September 30, 2026 (these electric plant in service, accumulated depreciation and construction work in progress amounts are included in the electric plant table above) (dollars in thousands):</span></div><div style="margin-top:5pt"><table style="border-collapse:collapse;display:inline-table;margin-bottom:5pt;vertical-align:text-bottom;width:99.853%"><tr><td style="width:1.0%"></td><td style="width:45.752%"></td><td style="width:0.1%"></td><td style="width:1.0%"></td><td style="width:11.637%"></td><td style="width:0.1%"></td><td style="width:0.1%"></td><td style="width:0.532%"></td><td style="width:0.1%"></td><td style="width:1.0%"></td><td style="width:11.637%"></td><td style="width:0.1%"></td><td style="width:0.1%"></td><td style="width:0.532%"></td><td style="width:0.1%"></td><td style="width:1.0%"></td><td style="width:11.637%"></td><td style="width:0.1%"></td><td style="width:0.1%"></td><td style="width:0.532%"></td><td style="width:0.1%"></td><td style="width:1.0%"></td><td style="width:11.641%"></td><td style="width:0.1%"></td></tr><tr><td colspan="3" style="padding:0 1pt"></td><td colspan="3" style="padding:1.5pt 1pt;text-align:center;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:700;line-height:120%">Tri-State<br/>Share</span></td><td colspan="3" style="padding:0 1pt"></td><td colspan="3" style="padding:1.5pt 1pt;text-align:center;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:700;line-height:120%">Electric<br/>Plant in<br/>Service</span></td><td colspan="3" style="padding:0 1pt"></td><td colspan="3" style="padding:1.5pt 1pt;text-align:center;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:700;line-height:120%">Accumulated<br/>Depreciation</span></td><td colspan="3" style="padding:0 1pt"></td><td colspan="3" style="padding:1.5pt 1pt;text-align:center;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:700;line-height:120%">Construction<br/>Work In<br/>Progress</span></td></tr><tr><td colspan="3" style="background-color:#cceeff;padding:1.5pt 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%">Yampa Project - Craig Generating Station Units 1 and 2</span></td><td colspan="2" style="background-color:#cceeff;border-top:1pt solid #000000;padding:1.5pt 0 1.5pt 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%">24.00 </span></td><td style="background-color:#cceeff;border-top:1pt solid #000000;padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%">%</span></td><td colspan="3" style="background-color:#cceeff;padding:0 1pt"></td><td style="background-color:#cceeff;border-top:1pt solid #000000;padding:1.5pt 0 1.5pt 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%">$</span></td><td style="background-color:#cceeff;border-top:1pt solid #000000;padding:1.5pt 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%">392,523 </span></td><td style="background-color:#cceeff;border-top:1pt solid #000000;padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"></td><td colspan="3" style="background-color:#cceeff;padding:0 1pt"></td><td style="background-color:#cceeff;border-top:1pt solid #000000;padding:1.5pt 0 1.5pt 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%">$</span></td><td style="background-color:#cceeff;border-top:1pt solid #000000;padding:1.5pt 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%">383,905 </span></td><td style="background-color:#cceeff;border-top:1pt solid #000000;padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"></td><td colspan="3" style="background-color:#cceeff;padding:0 1pt"></td><td style="background-color:#cceeff;border-top:1pt solid #000000;padding:1.5pt 0 1.5pt 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%">$</span></td><td style="background-color:#cceeff;border-top:1pt solid #000000;padding:1.5pt 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%">— </span></td><td style="background-color:#cceeff;border-top:1pt solid #000000;padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"></td></tr><tr><td colspan="3" style="padding:1.5pt 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%">MBPP - Laramie River Station</span></td><td colspan="2" style="padding:1.5pt 0 1.5pt 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%">28.50 </span></td><td style="padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%">%</span></td><td colspan="3" style="padding:0 1pt"></td><td colspan="2" style="padding:1.5pt 0 1.5pt 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%">546,356 </span></td><td style="padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"></td><td colspan="3" style="padding:0 1pt"></td><td colspan="2" style="padding:1.5pt 0 1.5pt 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%">367,881 </span></td><td style="padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"></td><td colspan="3" style="padding:0 1pt"></td><td colspan="2" style="padding:1.5pt 0 1.5pt 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%">3,616 </span></td><td style="padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"></td></tr><tr><td colspan="3" style="background-color:#cceeff;padding:1.5pt 1pt 1.5pt 7.75pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:700;line-height:120%">Total</span></td><td colspan="3" style="background-color:#cceeff;padding:0 1pt"></td><td colspan="3" style="background-color:#cceeff;padding:0 1pt"></td><td style="background-color:#cceeff;border-bottom:3pt double #000000;border-top:1pt solid #000000;padding:1.5pt 0 1.5pt 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:700;line-height:120%">$</span></td><td style="background-color:#cceeff;border-bottom:3pt double #000000;border-top:1pt solid #000000;padding:1.5pt 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:700;line-height:120%">938,879</span><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%"> </span></td><td style="background-color:#cceeff;border-bottom:3pt double #000000;border-top:1pt solid #000000;padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"></td><td colspan="3" style="background-color:#cceeff;padding:0 1pt"></td><td style="background-color:#cceeff;border-bottom:3pt double #000000;border-top:1pt solid #000000;padding:1.5pt 0 1.5pt 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:700;line-height:120%">$</span></td><td style="background-color:#cceeff;border-bottom:3pt double #000000;border-top:1pt solid #000000;padding:1.5pt 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:700;line-height:120%">751,786</span><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%"> </span></td><td style="background-color:#cceeff;border-bottom:3pt double #000000;border-top:1pt solid #000000;padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"></td><td colspan="3" style="background-color:#cceeff;padding:0 1pt"></td><td style="background-color:#cceeff;border-bottom:3pt double #000000;border-top:1pt solid #000000;padding:1.5pt 0 1.5pt 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:700;line-height:120%">$</span></td><td style="background-color:#cceeff;border-bottom:3pt double #000000;border-top:1pt solid #000000;padding:1.5pt 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:700;line-height:120%">3,616</span><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%"> </span></td><td style="background-color:#cceeff;border-bottom:3pt double #000000;border-top:1pt solid #000000;padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"></td></tr></table></div><div style="margin-top:10pt;text-indent:36pt"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:700;line-height:120%">OTHER PLANT</span><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%">:  Other plant consists of mine assets (discussed below) and non‑utility assets which consist of facilities not in service, land and irrigation equipment. The depreciation basis for all other plant assets is the straight-line method.</span></div><div style="margin-top:10pt;text-indent:36pt"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%">Tri-State owns 100 percent of Elk Ridge Mining and Reclamation, LLC (“Elk Ridge”), organized for the purpose of acquiring coal reserves and supplying coal for electric generation. Elk Ridge is the owner of the Colowyo Mine, a surface coal mine near Craig, Colorado, and the New Horizon Mine near Nucla, Colorado. The New Horizon Mine is in post-reclamation monitoring and no longer produces coal. The Colowyo Mine is in final reclamation and no longer produces coal. The expenses related to the Colowyo Mine coal used by Tri-State are included in fuel expense on Tri-State's consolidated statements of operations.</span></div><div style="margin-top:10pt;text-indent:36pt"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%">Other plant assets are as follows (dollars in thousands):</span></div><div style="margin-top:5pt"><table style="border-collapse:collapse;display:inline-table;margin-bottom:5pt;vertical-align:text-bottom;width:100.000%"><tr><td style="width:1.0%"></td><td style="width:64.543%"></td><td style="width:0.1%"></td><td style="width:1.0%"></td><td style="width:15.712%"></td><td style="width:0.1%"></td><td style="width:0.1%"></td><td style="width:0.530%"></td><td style="width:0.1%"></td><td style="width:1.0%"></td><td style="width:15.715%"></td><td style="width:0.1%"></td></tr><tr><td colspan="3" style="padding:0 1pt"></td><td colspan="3" style="padding:1.5pt 1pt;text-align:center;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:700;line-height:100%">September 30,<br/>2026</span></td><td colspan="3" style="padding:0 1pt"></td><td colspan="3" style="padding:1.5pt 1pt;text-align:center;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:700;line-height:100%">December 31,<br/>2025</span></td></tr><tr><td colspan="3" style="background-color:#cceeff;padding:1.5pt 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">Colowyo Mine assets</span></td><td style="background-color:#cceeff;border-top:1pt solid #000000;padding:1.5pt 0 1.5pt 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">$</span></td><td style="background-color:#cceeff;border-top:1pt solid #000000;padding:1.5pt 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">247,255 </span></td><td style="background-color:#cceeff;border-top:1pt solid #000000;padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"></td><td colspan="3" style="background-color:#cceeff;padding:0 1pt"></td><td style="background-color:#cceeff;border-top:1pt solid #000000;padding:1.5pt 0 1.5pt 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">$</span></td><td style="background-color:#cceeff;border-top:1pt solid #000000;padding:1.5pt 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">297,636 </span></td><td style="background-color:#cceeff;border-top:1pt solid #000000;padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"></td></tr><tr><td colspan="3" style="background-color:#ffffff;padding:1.5pt 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">New Horizon Mine assets</span></td><td colspan="2" style="background-color:#ffffff;padding:1.5pt 0 1.5pt 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">6,287 </span></td><td style="background-color:#ffffff;padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"></td><td colspan="3" style="background-color:#ffffff;padding:0 1pt"></td><td colspan="2" style="background-color:#ffffff;padding:1.5pt 0 1.5pt 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">6,287 </span></td><td style="background-color:#ffffff;padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"></td></tr><tr><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td></tr><tr><td colspan="3" style="background-color:#cceeff;padding:1.5pt 1pt 1.5pt 12.25pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">Accumulated depreciation and depletion</span></td><td colspan="2" style="background-color:#cceeff;padding:1.5pt 0 1.5pt 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">(197,058)</span></td><td style="background-color:#cceeff;padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"></td><td colspan="3" style="background-color:#cceeff;padding:0 1pt"></td><td colspan="2" style="background-color:#cceeff;padding:1.5pt 0 1.5pt 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">(232,575)</span></td><td style="background-color:#cceeff;padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"></td></tr><tr><td colspan="3" style="background-color:#ffffff;padding:1.5pt 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:700;line-height:100%">Net mine assets</span></td><td colspan="2" style="background-color:#ffffff;border-top:1pt solid #000000;padding:1.5pt 0 1.5pt 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:700;line-height:100%">56,484</span><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%"> </span></td><td style="background-color:#ffffff;border-top:1pt solid #000000;padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"></td><td colspan="3" style="background-color:#ffffff;padding:0 1pt"></td><td colspan="2" style="background-color:#ffffff;border-top:1pt solid #000000;padding:1.5pt 0 1.5pt 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:700;line-height:100%">71,348</span><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%"> </span></td><td style="background-color:#ffffff;border-top:1pt solid #000000;padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"></td></tr><tr><td colspan="3" style="background-color:#cceeff;padding:1.5pt 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">Non-utility assets</span></td><td colspan="2" style="background-color:#cceeff;padding:1.5pt 0 1.5pt 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">551,402 </span></td><td style="background-color:#cceeff;padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"></td><td colspan="3" style="background-color:#cceeff;padding:0 1pt"></td><td colspan="2" style="background-color:#cceeff;padding:1.5pt 0 1.5pt 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">549,487 </span></td><td style="background-color:#cceeff;padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"></td></tr><tr><td colspan="3" style="background-color:#ffffff;padding:1.5pt 1pt 1.5pt 12.25pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">Accumulated depreciation</span></td><td colspan="2" style="background-color:#ffffff;padding:1.5pt 0 1.5pt 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">(528,030)</span></td><td style="background-color:#ffffff;padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"></td><td colspan="3" style="background-color:#ffffff;padding:0 1pt"></td><td colspan="2" style="background-color:#ffffff;padding:1.5pt 0 1.5pt 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">(527,902)</span></td><td style="background-color:#ffffff;padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"></td></tr><tr><td colspan="3" style="background-color:#cceeff;padding:1.5pt 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:700;line-height:100%">Net non-utility assets</span></td><td colspan="2" style="background-color:#cceeff;border-top:1pt solid #000000;padding:1.5pt 0 1.5pt 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:700;line-height:100%">23,372</span><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%"> </span></td><td style="background-color:#cceeff;border-top:1pt solid #000000;padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"></td><td colspan="3" style="background-color:#cceeff;padding:0 1pt"></td><td colspan="2" style="background-color:#cceeff;border-top:1pt solid #000000;padding:1.5pt 0 1.5pt 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:700;line-height:100%">21,585</span><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%"> </span></td><td style="background-color:#cceeff;border-top:1pt solid #000000;padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"></td></tr><tr><td colspan="3" style="background-color:#ffffff;padding:1.5pt 1pt 1.5pt 12.25pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:700;line-height:100%">Net other plant</span></td><td style="background-color:#ffffff;border-bottom:3pt double #000000;border-top:1pt solid #000000;padding:1.5pt 0 1.5pt 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:700;line-height:100%">$</span></td><td style="background-color:#ffffff;border-bottom:3pt double #000000;border-top:1pt solid #000000;padding:1.5pt 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:700;line-height:100%">79,856</span><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%"> </span></td><td style="background-color:#ffffff;border-bottom:3pt double #000000;border-top:1pt solid #000000;padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"></td><td colspan="3" style="background-color:#ffffff;padding:0 1pt"></td><td style="background-color:#ffffff;border-bottom:3pt double #000000;border-top:1pt solid #000000;padding:1.5pt 0 1.5pt 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:700;line-height:100%">$</span></td><td style="background-color:#ffffff;border-bottom:3pt double #000000;border-top:1pt solid #000000;padding:1.5pt 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:700;line-height:100%">92,933</span><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%"> </span></td><td style="background-color:#ffffff;border-bottom:3pt double #000000;border-top:1pt solid #000000;padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"></td></tr></table></div> <div style="margin-top:10pt;text-indent:36pt"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:700;line-height:120%">ELECTRIC PLANT</span><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%">:  As of September 30, 2026, Tri-State's investment in electric plant and the related annual rates of depreciation or amortization calculated using the straight‑line method are as follows (dollars in thousands):</span></div><div style="margin-top:5pt"><table style="border-collapse:collapse;display:inline-table;margin-bottom:5pt;vertical-align:text-bottom;width:100.000%"><tr><td style="width:1.0%"></td><td style="width:36.765%"></td><td style="width:0.1%"></td><td style="width:1.0%"></td><td style="width:7.087%"></td><td style="width:0.1%"></td><td style="width:0.1%"></td><td style="width:0.530%"></td><td style="width:0.1%"></td><td style="width:1.0%"></td><td style="width:2.847%"></td><td style="width:0.1%"></td><td style="width:0.1%"></td><td style="width:0.530%"></td><td style="width:0.1%"></td><td style="width:1.0%"></td><td style="width:7.087%"></td><td style="width:0.1%"></td><td style="width:0.1%"></td><td style="width:0.530%"></td><td style="width:0.1%"></td><td style="width:1.0%"></td><td style="width:11.619%"></td><td style="width:0.1%"></td><td style="width:0.1%"></td><td style="width:0.530%"></td><td style="width:0.1%"></td><td style="width:1.0%"></td><td style="width:11.619%"></td><td style="width:0.1%"></td><td style="width:0.1%"></td><td style="width:0.530%"></td><td style="width:0.1%"></td><td style="width:1.0%"></td><td style="width:11.626%"></td><td style="width:0.1%"></td></tr><tr><td colspan="3" style="padding:0 1pt"></td><td colspan="15" style="padding:1.5pt 1pt;text-align:center;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:8pt;font-weight:700;line-height:120%">Annual Depreciation Rate</span></td><td colspan="3" style="padding:0 1pt"></td><td colspan="3" style="padding:1.5pt 1pt;text-align:center;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:8pt;font-weight:700;line-height:120%">Plant In<br/>Service</span></td><td colspan="3" style="padding:0 1pt"></td><td colspan="3" style="padding:1.5pt 1pt;text-align:center;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:8pt;font-weight:700;line-height:120%">Accumulated<br/>Depreciation</span></td><td colspan="3" style="padding:0 1pt"></td><td colspan="3" style="padding:1.5pt 1pt;text-align:center;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:8pt;font-weight:700;line-height:120%">Net Book<br/>Value</span></td></tr><tr><td colspan="3" style="background-color:#cceeff;padding:1.5pt 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%">Generation plant</span></td><td colspan="2" style="background-color:#cceeff;border-top:1pt solid #000000;padding:1.5pt 0 1.5pt 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%">1.14 </span></td><td style="background-color:#cceeff;border-top:1pt solid #000000;padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%">%</span></td><td colspan="3" style="background-color:#cceeff;border-top:1pt solid #000000;padding:0 1pt"></td><td colspan="3" style="background-color:#cceeff;border-top:1pt solid #000000;padding:1.5pt 1pt;text-align:center;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%">to</span></td><td colspan="3" style="background-color:#cceeff;border-top:1pt solid #000000;padding:0 1pt"></td><td colspan="2" style="background-color:#cceeff;border-top:1pt solid #000000;padding:1.5pt 0 1.5pt 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%">4.14 </span></td><td style="background-color:#cceeff;border-top:1pt solid #000000;padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%">%</span></td><td colspan="3" style="background-color:#cceeff;padding:0 1pt"></td><td style="background-color:#cceeff;border-top:1pt solid #000000;padding:1.5pt 0 1.5pt 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%">$</span></td><td style="background-color:#cceeff;border-top:1pt solid #000000;padding:1.5pt 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%">3,367,291 </span></td><td style="background-color:#cceeff;border-top:1pt solid #000000;padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"></td><td colspan="3" style="background-color:#cceeff;padding:0 1pt"></td><td style="background-color:#cceeff;border-top:1pt solid #000000;padding:1.5pt 0 1.5pt 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%">$</span></td><td style="background-color:#cceeff;border-top:1pt solid #000000;padding:1.5pt 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%">(1,908,476)</span></td><td style="background-color:#cceeff;border-top:1pt solid #000000;padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"></td><td colspan="3" style="background-color:#cceeff;padding:0 1pt"></td><td style="background-color:#cceeff;border-top:1pt solid #000000;padding:1.5pt 0 1.5pt 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%">$</span></td><td style="background-color:#cceeff;border-top:1pt solid #000000;padding:1.5pt 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%">1,458,815 </span></td><td style="background-color:#cceeff;border-top:1pt solid #000000;padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"></td></tr><tr><td colspan="3" style="padding:1.5pt 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%">Transmission plant</span></td><td colspan="2" style="padding:1.5pt 0 1.5pt 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%">1.17 </span></td><td style="padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%">%</span></td><td colspan="3" style="padding:0 1pt"></td><td colspan="3" style="padding:1.5pt 1pt;text-align:center;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%">to</span></td><td colspan="3" style="padding:0 1pt"></td><td colspan="2" style="padding:1.5pt 0 1.5pt 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%">1.84 </span></td><td style="padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%">%</span></td><td colspan="3" style="padding:0 1pt"></td><td colspan="2" style="padding:1.5pt 0 1.5pt 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%">2,254,630 </span></td><td style="padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"></td><td colspan="3" style="padding:0 1pt"></td><td colspan="2" style="padding:1.5pt 0 1.5pt 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%">(839,831)</span></td><td style="padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"></td><td colspan="3" style="padding:0 1pt"></td><td colspan="2" style="padding:1.5pt 0 1.5pt 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%">1,414,799 </span></td><td style="padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"></td></tr><tr><td colspan="3" style="background-color:#cceeff;padding:1.5pt 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%">General plant</span></td><td colspan="2" style="background-color:#cceeff;padding:1.5pt 0 1.5pt 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%">1.20 </span></td><td style="background-color:#cceeff;padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%">%</span></td><td colspan="3" style="background-color:#cceeff;padding:0 1pt"></td><td colspan="3" style="background-color:#cceeff;padding:1.5pt 1pt;text-align:center;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%">to</span></td><td colspan="3" style="background-color:#cceeff;padding:0 1pt"></td><td colspan="2" style="background-color:#cceeff;padding:1.5pt 0 1.5pt 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%">11.60 </span></td><td style="background-color:#cceeff;padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%">%</span></td><td colspan="3" style="background-color:#cceeff;padding:0 1pt"></td><td colspan="2" style="background-color:#cceeff;padding:1.5pt 0 1.5pt 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%">278,372 </span></td><td style="background-color:#cceeff;padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"></td><td colspan="3" style="background-color:#cceeff;padding:0 1pt"></td><td colspan="2" style="background-color:#cceeff;padding:1.5pt 0 1.5pt 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%">(151,543)</span></td><td style="background-color:#cceeff;padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"></td><td colspan="3" style="background-color:#cceeff;padding:0 1pt"></td><td colspan="2" style="background-color:#cceeff;padding:1.5pt 0 1.5pt 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%">126,829 </span></td><td style="background-color:#cceeff;padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"></td></tr><tr><td colspan="3" style="padding:1.5pt 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%">Other</span></td><td colspan="2" style="padding:1.5pt 0 1.5pt 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%">2.75 </span></td><td style="padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%">%</span></td><td colspan="3" style="padding:0 1pt"></td><td colspan="3" style="padding:1.5pt 1pt;text-align:center;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%">to</span></td><td colspan="3" style="padding:0 1pt"></td><td colspan="2" style="padding:1.5pt 0 1.5pt 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%">10.00 </span></td><td style="padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%">%</span></td><td colspan="3" style="padding:0 1pt"></td><td colspan="2" style="padding:1.5pt 0 1.5pt 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%">249,213 </span></td><td style="padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"></td><td colspan="3" style="padding:0 1pt"></td><td colspan="2" style="padding:1.5pt 0 1.5pt 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%">(105,590)</span></td><td style="padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"></td><td colspan="3" style="padding:0 1pt"></td><td colspan="2" style="padding:1.5pt 0 1.5pt 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%">143,623 </span></td><td style="padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"></td></tr><tr><td colspan="3" style="background-color:#cceeff;padding:1.5pt 1pt 1.5pt 12.25pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:700;line-height:120%">Electric plant in service (at cost)</span></td><td colspan="3" style="background-color:#cceeff;padding:0 1pt"></td><td colspan="3" style="background-color:#cceeff;padding:0 1pt"></td><td colspan="3" style="background-color:#cceeff;padding:0 1pt"></td><td colspan="3" style="background-color:#cceeff;padding:0 1pt"></td><td colspan="3" style="background-color:#cceeff;padding:0 1pt"></td><td colspan="3" style="background-color:#cceeff;padding:0 1pt"></td><td style="background-color:#cceeff;border-top:1pt solid #000000;padding:1.5pt 0 1.5pt 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:700;line-height:120%">$</span></td><td style="background-color:#cceeff;border-top:1pt solid #000000;padding:1.5pt 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:700;line-height:120%">6,149,506</span><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%"> </span></td><td style="background-color:#cceeff;border-top:1pt solid #000000;padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"></td><td colspan="3" style="background-color:#cceeff;padding:0 1pt"></td><td style="background-color:#cceeff;border-top:1pt solid #000000;padding:1.5pt 0 1.5pt 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:700;line-height:120%">$</span></td><td style="background-color:#cceeff;border-top:1pt solid #000000;padding:1.5pt 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:700;line-height:120%">(3,005,440)</span></td><td style="background-color:#cceeff;border-top:1pt solid #000000;padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"></td><td colspan="3" style="background-color:#cceeff;padding:0 1pt"></td><td colspan="2" style="background-color:#cceeff;border-top:1pt solid #000000;padding:1.5pt 0 1.5pt 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:700;line-height:120%">3,144,066</span><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%"> </span></td><td style="background-color:#cceeff;border-top:1pt solid #000000;padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"></td></tr><tr><td colspan="3" style="padding:1.5pt 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%">Construction work in progress</span></td><td colspan="3" style="padding:0 1pt"></td><td colspan="3" style="padding:0 1pt"></td><td colspan="3" style="padding:0 1pt"></td><td colspan="3" style="padding:0 1pt"></td><td colspan="3" style="padding:0 1pt"></td><td colspan="3" style="padding:0 1pt"></td><td colspan="3" style="border-top:3pt double #000000;padding:0 1pt"></td><td colspan="3" style="padding:0 1pt"></td><td colspan="3" style="border-top:3pt double #000000;padding:0 1pt"></td><td colspan="3" style="padding:0 1pt"></td><td colspan="2" style="padding:1.5pt 0 1.5pt 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%">197,543 </span></td><td style="padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"></td></tr><tr><td colspan="3" style="background-color:#cceeff;padding:1.5pt 1pt 1.5pt 12.25pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:700;line-height:120%">Electric plant</span></td><td colspan="3" style="background-color:#cceeff;padding:0 1pt"></td><td colspan="3" style="background-color:#cceeff;padding:0 1pt"></td><td colspan="3" style="background-color:#cceeff;padding:0 1pt"></td><td colspan="3" style="background-color:#cceeff;padding:0 1pt"></td><td colspan="3" style="background-color:#cceeff;padding:0 1pt"></td><td colspan="3" style="background-color:#cceeff;padding:0 1pt"></td><td colspan="3" style="background-color:#cceeff;padding:0 1pt"></td><td colspan="3" style="background-color:#cceeff;padding:0 1pt"></td><td colspan="3" style="background-color:#cceeff;padding:0 1pt"></td><td colspan="3" style="background-color:#cceeff;padding:0 1pt"></td><td style="background-color:#cceeff;border-bottom:3pt double #000000;border-top:1pt solid #000000;padding:1.5pt 0 1.5pt 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:700;line-height:120%">$</span></td><td style="background-color:#cceeff;border-bottom:3pt double #000000;border-top:1pt solid #000000;padding:1.5pt 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:700;line-height:120%">3,341,609</span><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%"> </span></td><td style="background-color:#cceeff;border-bottom:3pt double #000000;border-top:1pt solid #000000;padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"></td></tr></table></div><div style="text-indent:36pt"><span><br/></span></div><div style="margin-top:10pt;text-indent:36pt"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%">As of December 31, 2025, Tri-State's investment in electric plant and the related annual rates of depreciation or amortization calculated using the straight‑line method are as follows (dollars in thousands):</span></div><div style="margin-top:5pt"><table style="border-collapse:collapse;display:inline-table;margin-bottom:5pt;vertical-align:text-bottom;width:99.853%"><tr><td style="width:1.0%"></td><td style="width:36.381%"></td><td style="width:0.1%"></td><td style="width:1.0%"></td><td style="width:7.245%"></td><td style="width:0.1%"></td><td style="width:0.1%"></td><td style="width:0.532%"></td><td style="width:0.1%"></td><td style="width:1.0%"></td><td style="width:2.853%"></td><td style="width:0.1%"></td><td style="width:0.1%"></td><td style="width:0.532%"></td><td style="width:0.1%"></td><td style="width:1.0%"></td><td style="width:7.245%"></td><td style="width:0.1%"></td><td style="width:0.1%"></td><td style="width:0.532%"></td><td style="width:0.1%"></td><td style="width:1.0%"></td><td style="width:11.637%"></td><td style="width:0.1%"></td><td style="width:0.1%"></td><td style="width:0.532%"></td><td style="width:0.1%"></td><td style="width:1.0%"></td><td style="width:11.637%"></td><td style="width:0.1%"></td><td style="width:0.1%"></td><td style="width:0.532%"></td><td style="width:0.1%"></td><td style="width:1.0%"></td><td style="width:11.642%"></td><td style="width:0.1%"></td></tr><tr><td colspan="3" style="padding:0 1pt"></td><td colspan="15" style="padding:1.5pt 1pt;text-align:center;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:8pt;font-weight:700;line-height:120%">Annual Depreciation Rate</span></td><td colspan="3" style="padding:0 1pt"></td><td colspan="3" style="padding:1.5pt 1pt;text-align:center;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:8pt;font-weight:700;line-height:120%">Plant In<br/>Service</span></td><td colspan="3" style="padding:0 1pt"></td><td colspan="3" style="padding:1.5pt 1pt;text-align:center;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:8pt;font-weight:700;line-height:120%">Accumulated<br/>Depreciation</span></td><td colspan="3" style="padding:0 1pt"></td><td colspan="3" style="padding:1.5pt 1pt;text-align:center;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:8pt;font-weight:700;line-height:120%">Net Book<br/>Value</span></td></tr><tr><td colspan="3" style="background-color:#cceeff;padding:1.5pt 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%">Generation plant</span></td><td colspan="2" style="background-color:#cceeff;border-top:1pt solid #000000;padding:1.5pt 0 1.5pt 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%">1.14 </span></td><td style="background-color:#cceeff;border-top:1pt solid #000000;padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%">%</span></td><td colspan="3" style="background-color:#cceeff;border-top:1pt solid #000000;padding:0 1pt"></td><td colspan="3" style="background-color:#cceeff;border-top:1pt solid #000000;padding:1.5pt 1pt;text-align:center;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%">to</span></td><td colspan="3" style="background-color:#cceeff;border-top:1pt solid #000000;padding:0 1pt"></td><td colspan="2" style="background-color:#cceeff;border-top:1pt solid #000000;padding:1.5pt 0 1.5pt 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%">4.14 </span></td><td style="background-color:#cceeff;border-top:1pt solid #000000;padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%">%</span></td><td colspan="3" style="background-color:#cceeff;padding:0 1pt"></td><td style="background-color:#cceeff;border-top:1pt solid #000000;padding:1.5pt 0 1.5pt 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%">$</span></td><td style="background-color:#cceeff;border-top:1pt solid #000000;padding:1.5pt 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%">3,375,766 </span></td><td style="background-color:#cceeff;border-top:1pt solid #000000;padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"></td><td colspan="3" style="background-color:#cceeff;padding:0 1pt"></td><td style="background-color:#cceeff;border-top:1pt solid #000000;padding:1.5pt 0 1.5pt 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%">$</span></td><td style="background-color:#cceeff;border-top:1pt solid #000000;padding:1.5pt 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%">(1,836,220)</span></td><td style="background-color:#cceeff;border-top:1pt solid #000000;padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"></td><td colspan="3" style="background-color:#cceeff;padding:0 1pt"></td><td style="background-color:#cceeff;border-top:1pt solid #000000;padding:1.5pt 0 1.5pt 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%">$</span></td><td style="background-color:#cceeff;border-top:1pt solid #000000;padding:1.5pt 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%">1,539,546 </span></td><td style="background-color:#cceeff;border-top:1pt solid #000000;padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"></td></tr><tr><td colspan="3" style="padding:1.5pt 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%">Transmission plant</span></td><td colspan="2" style="padding:1.5pt 0 1.5pt 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%">1.17 </span></td><td style="padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%">%</span></td><td colspan="3" style="padding:0 1pt"></td><td colspan="3" style="padding:1.5pt 1pt;text-align:center;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%">to</span></td><td colspan="3" style="padding:0 1pt"></td><td colspan="2" style="padding:1.5pt 0 1.5pt 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%">1.84 </span></td><td style="padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%">%</span></td><td colspan="3" style="padding:0 1pt"></td><td colspan="2" style="padding:1.5pt 0 1.5pt 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%">2,174,345 </span></td><td style="padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"></td><td colspan="3" style="padding:0 1pt"></td><td colspan="2" style="padding:1.5pt 0 1.5pt 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%">(828,367)</span></td><td style="padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"></td><td colspan="3" style="padding:0 1pt"></td><td colspan="2" style="padding:1.5pt 0 1.5pt 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%">1,345,978 </span></td><td style="padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"></td></tr><tr><td colspan="3" style="background-color:#cceeff;padding:1.5pt 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%">General plant</span></td><td colspan="2" style="background-color:#cceeff;padding:1.5pt 0 1.5pt 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%">1.20 </span></td><td style="background-color:#cceeff;padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%">%</span></td><td colspan="3" style="background-color:#cceeff;padding:0 1pt"></td><td colspan="3" style="background-color:#cceeff;padding:1.5pt 1pt;text-align:center;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%">to</span></td><td colspan="3" style="background-color:#cceeff;padding:0 1pt"></td><td colspan="2" style="background-color:#cceeff;padding:1.5pt 0 1.5pt 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%">11.60 </span></td><td style="background-color:#cceeff;padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%">%</span></td><td colspan="3" style="background-color:#cceeff;padding:0 1pt"></td><td colspan="2" style="background-color:#cceeff;padding:1.5pt 0 1.5pt 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%">278,735 </span></td><td style="background-color:#cceeff;padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"></td><td colspan="3" style="background-color:#cceeff;padding:0 1pt"></td><td colspan="2" style="background-color:#cceeff;padding:1.5pt 0 1.5pt 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%">(146,589)</span></td><td style="background-color:#cceeff;padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"></td><td colspan="3" style="background-color:#cceeff;padding:0 1pt"></td><td colspan="2" style="background-color:#cceeff;padding:1.5pt 0 1.5pt 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%">132,146 </span></td><td style="background-color:#cceeff;padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"></td></tr><tr><td colspan="3" style="padding:1.5pt 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%">Other</span></td><td colspan="2" style="padding:1.5pt 0 1.5pt 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%">2.75 </span></td><td style="padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%">%</span></td><td colspan="3" style="padding:0 1pt"></td><td colspan="3" style="padding:1.5pt 1pt;text-align:center;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%">to</span></td><td colspan="3" style="padding:0 1pt"></td><td colspan="2" style="padding:1.5pt 0 1.5pt 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%">10.00 </span></td><td style="padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%">%</span></td><td colspan="3" style="padding:0 1pt"></td><td colspan="2" style="padding:1.5pt 0 1.5pt 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%">246,445 </span></td><td style="padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"></td><td colspan="3" style="padding:0 1pt"></td><td colspan="2" style="padding:1.5pt 0 1.5pt 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%">(102,531)</span></td><td style="padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"></td><td colspan="3" style="padding:0 1pt"></td><td colspan="2" style="padding:1.5pt 0 1.5pt 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%">143,914 </span></td><td style="padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"></td></tr><tr><td colspan="3" style="background-color:#cceeff;padding:1.5pt 1pt 1.5pt 12.25pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:700;line-height:120%">Electric plant in service (at cost)</span></td><td colspan="3" style="background-color:#cceeff;padding:0 1pt"></td><td colspan="3" style="background-color:#cceeff;padding:0 1pt"></td><td colspan="3" style="background-color:#cceeff;padding:0 1pt"></td><td colspan="3" style="background-color:#cceeff;padding:0 1pt"></td><td colspan="3" style="background-color:#cceeff;padding:0 1pt"></td><td colspan="3" style="background-color:#cceeff;padding:0 1pt"></td><td style="background-color:#cceeff;border-top:1pt solid #000000;padding:1.5pt 0 1.5pt 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:700;line-height:120%">$</span></td><td style="background-color:#cceeff;border-top:1pt solid #000000;padding:1.5pt 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:700;line-height:120%">6,075,291</span><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%"> </span></td><td style="background-color:#cceeff;border-top:1pt solid #000000;padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"></td><td colspan="3" style="background-color:#cceeff;padding:0 1pt"></td><td style="background-color:#cceeff;border-top:1pt solid #000000;padding:1.5pt 0 1.5pt 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:700;line-height:120%">$</span></td><td style="background-color:#cceeff;border-top:1pt solid #000000;padding:1.5pt 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:700;line-height:120%">(2,913,707)</span></td><td style="background-color:#cceeff;border-top:1pt solid #000000;padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"></td><td colspan="3" style="background-color:#cceeff;padding:0 1pt"></td><td colspan="2" style="background-color:#cceeff;border-top:1pt solid #000000;padding:1.5pt 0 1.5pt 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:700;line-height:120%">3,161,584</span><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%"> </span></td><td style="background-color:#cceeff;border-top:1pt solid #000000;padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"></td></tr><tr><td colspan="3" style="padding:1.5pt 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%">Construction work in progress</span></td><td colspan="3" style="padding:0 1pt"></td><td colspan="3" style="padding:0 1pt"></td><td colspan="3" style="padding:0 1pt"></td><td colspan="3" style="padding:0 1pt"></td><td colspan="3" style="padding:0 1pt"></td><td colspan="3" style="padding:0 1pt"></td><td colspan="3" style="border-top:3pt double #000000;padding:0 1pt"></td><td colspan="3" style="padding:0 1pt"></td><td colspan="3" style="border-top:3pt double #000000;padding:0 1pt"></td><td colspan="3" style="padding:0 1pt"></td><td colspan="2" style="padding:1.5pt 0 1.5pt 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%">143,940 </span></td><td style="padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"></td></tr><tr><td colspan="3" style="background-color:#cceeff;padding:1.5pt 1pt 1.5pt 12.25pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:700;line-height:120%">Electric plant</span></td><td colspan="3" style="background-color:#cceeff;padding:0 1pt"></td><td colspan="3" style="background-color:#cceeff;padding:0 1pt"></td><td colspan="3" style="background-color:#cceeff;padding:0 1pt"></td><td colspan="3" style="background-color:#cceeff;padding:0 1pt"></td><td colspan="3" style="background-color:#cceeff;padding:0 1pt"></td><td colspan="3" style="background-color:#cceeff;padding:0 1pt"></td><td colspan="3" style="background-color:#cceeff;padding:0 1pt"></td><td colspan="3" style="background-color:#cceeff;padding:0 1pt"></td><td colspan="3" style="background-color:#cceeff;padding:0 1pt"></td><td colspan="3" style="background-color:#cceeff;padding:0 1pt"></td><td style="background-color:#cceeff;border-bottom:3pt double #000000;border-top:1pt solid #000000;padding:1.5pt 0 1.5pt 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:700;line-height:120%">$</span></td><td style="background-color:#cceeff;border-bottom:3pt double #000000;border-top:1pt solid #000000;padding:1.5pt 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:700;line-height:120%">3,305,524</span><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%"> </span></td><td style="background-color:#cceeff;border-bottom:3pt double #000000;border-top:1pt solid #000000;padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"></td></tr></table></div> 0.0114 0.0414 3367291000 1908476000 1458815000 0.0117 0.0184 2254630000 839831000 1414799000 0.0120 0.1160 278372000 151543000 126829000 0.0275 0.1000 249213000 105590000 143623000 6149506000 3005440000 3144066000 197543000 3341609000 0.0114 0.0414 3375766000 1836220000 1539546000 0.0117 0.0184 2174345000 828367000 1345978000 0.0120 0.1160 278735000 146589000 132146000 0.0275 0.1000 246445000 102531000 143914000 6075291000 2913707000 3161584000 143940000 3305524000 <div style="margin-top:10pt;text-indent:36pt"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:700;line-height:120%">JOINTLY OWNED FACILITIES</span><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%">:  Tri-State's share in each jointly owned facility is as follows as of September 30, 2026 (these electric plant in service, accumulated depreciation and construction work in progress amounts are included in the electric plant table above) (dollars in thousands):</span></div><div style="margin-top:5pt"><table style="border-collapse:collapse;display:inline-table;margin-bottom:5pt;vertical-align:text-bottom;width:99.853%"><tr><td style="width:1.0%"></td><td style="width:45.752%"></td><td style="width:0.1%"></td><td style="width:1.0%"></td><td style="width:11.637%"></td><td style="width:0.1%"></td><td style="width:0.1%"></td><td style="width:0.532%"></td><td style="width:0.1%"></td><td style="width:1.0%"></td><td style="width:11.637%"></td><td style="width:0.1%"></td><td style="width:0.1%"></td><td style="width:0.532%"></td><td style="width:0.1%"></td><td style="width:1.0%"></td><td style="width:11.637%"></td><td style="width:0.1%"></td><td style="width:0.1%"></td><td style="width:0.532%"></td><td style="width:0.1%"></td><td style="width:1.0%"></td><td style="width:11.641%"></td><td style="width:0.1%"></td></tr><tr><td colspan="3" style="padding:0 1pt"></td><td colspan="3" style="padding:1.5pt 1pt;text-align:center;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:700;line-height:120%">Tri-State<br/>Share</span></td><td colspan="3" style="padding:0 1pt"></td><td colspan="3" style="padding:1.5pt 1pt;text-align:center;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:700;line-height:120%">Electric<br/>Plant in<br/>Service</span></td><td colspan="3" style="padding:0 1pt"></td><td colspan="3" style="padding:1.5pt 1pt;text-align:center;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:700;line-height:120%">Accumulated<br/>Depreciation</span></td><td colspan="3" style="padding:0 1pt"></td><td colspan="3" style="padding:1.5pt 1pt;text-align:center;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:700;line-height:120%">Construction<br/>Work In<br/>Progress</span></td></tr><tr><td colspan="3" style="background-color:#cceeff;padding:1.5pt 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%">Yampa Project - Craig Generating Station Units 1 and 2</span></td><td colspan="2" style="background-color:#cceeff;border-top:1pt solid #000000;padding:1.5pt 0 1.5pt 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%">24.00 </span></td><td style="background-color:#cceeff;border-top:1pt solid #000000;padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%">%</span></td><td colspan="3" style="background-color:#cceeff;padding:0 1pt"></td><td style="background-color:#cceeff;border-top:1pt solid #000000;padding:1.5pt 0 1.5pt 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%">$</span></td><td style="background-color:#cceeff;border-top:1pt solid #000000;padding:1.5pt 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%">392,523 </span></td><td style="background-color:#cceeff;border-top:1pt solid #000000;padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"></td><td colspan="3" style="background-color:#cceeff;padding:0 1pt"></td><td style="background-color:#cceeff;border-top:1pt solid #000000;padding:1.5pt 0 1.5pt 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%">$</span></td><td style="background-color:#cceeff;border-top:1pt solid #000000;padding:1.5pt 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%">383,905 </span></td><td style="background-color:#cceeff;border-top:1pt solid #000000;padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"></td><td colspan="3" style="background-color:#cceeff;padding:0 1pt"></td><td style="background-color:#cceeff;border-top:1pt solid #000000;padding:1.5pt 0 1.5pt 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%">$</span></td><td style="background-color:#cceeff;border-top:1pt solid #000000;padding:1.5pt 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%">— </span></td><td style="background-color:#cceeff;border-top:1pt solid #000000;padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"></td></tr><tr><td colspan="3" style="padding:1.5pt 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%">MBPP - Laramie River Station</span></td><td colspan="2" style="padding:1.5pt 0 1.5pt 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%">28.50 </span></td><td style="padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%">%</span></td><td colspan="3" style="padding:0 1pt"></td><td colspan="2" style="padding:1.5pt 0 1.5pt 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%">546,356 </span></td><td style="padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"></td><td colspan="3" style="padding:0 1pt"></td><td colspan="2" style="padding:1.5pt 0 1.5pt 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%">367,881 </span></td><td style="padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"></td><td colspan="3" style="padding:0 1pt"></td><td colspan="2" style="padding:1.5pt 0 1.5pt 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%">3,616 </span></td><td style="padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"></td></tr><tr><td colspan="3" style="background-color:#cceeff;padding:1.5pt 1pt 1.5pt 7.75pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:700;line-height:120%">Total</span></td><td colspan="3" style="background-color:#cceeff;padding:0 1pt"></td><td colspan="3" style="background-color:#cceeff;padding:0 1pt"></td><td style="background-color:#cceeff;border-bottom:3pt double #000000;border-top:1pt solid #000000;padding:1.5pt 0 1.5pt 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:700;line-height:120%">$</span></td><td style="background-color:#cceeff;border-bottom:3pt double #000000;border-top:1pt solid #000000;padding:1.5pt 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:700;line-height:120%">938,879</span><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%"> </span></td><td style="background-color:#cceeff;border-bottom:3pt double #000000;border-top:1pt solid #000000;padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"></td><td colspan="3" style="background-color:#cceeff;padding:0 1pt"></td><td style="background-color:#cceeff;border-bottom:3pt double #000000;border-top:1pt solid #000000;padding:1.5pt 0 1.5pt 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:700;line-height:120%">$</span></td><td style="background-color:#cceeff;border-bottom:3pt double #000000;border-top:1pt solid #000000;padding:1.5pt 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:700;line-height:120%">751,786</span><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%"> </span></td><td style="background-color:#cceeff;border-bottom:3pt double #000000;border-top:1pt solid #000000;padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"></td><td colspan="3" style="background-color:#cceeff;padding:0 1pt"></td><td style="background-color:#cceeff;border-bottom:3pt double #000000;border-top:1pt solid #000000;padding:1.5pt 0 1.5pt 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:700;line-height:120%">$</span></td><td style="background-color:#cceeff;border-bottom:3pt double #000000;border-top:1pt solid #000000;padding:1.5pt 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:700;line-height:120%">3,616</span><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%"> </span></td><td style="background-color:#cceeff;border-bottom:3pt double #000000;border-top:1pt solid #000000;padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"></td></tr></table></div> 0.2400 392523000 383905000 0 0.2850 546356000 367881000 3616000 938879000 751786000 3616000 1 <div style="margin-top:10pt;text-indent:36pt"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%">Other plant assets are as follows (dollars in thousands):</span></div><div style="margin-top:5pt"><table style="border-collapse:collapse;display:inline-table;margin-bottom:5pt;vertical-align:text-bottom;width:100.000%"><tr><td style="width:1.0%"></td><td style="width:64.543%"></td><td style="width:0.1%"></td><td style="width:1.0%"></td><td style="width:15.712%"></td><td style="width:0.1%"></td><td style="width:0.1%"></td><td style="width:0.530%"></td><td style="width:0.1%"></td><td style="width:1.0%"></td><td style="width:15.715%"></td><td style="width:0.1%"></td></tr><tr><td colspan="3" style="padding:0 1pt"></td><td colspan="3" style="padding:1.5pt 1pt;text-align:center;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:700;line-height:100%">September 30,<br/>2026</span></td><td colspan="3" style="padding:0 1pt"></td><td colspan="3" style="padding:1.5pt 1pt;text-align:center;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:700;line-height:100%">December 31,<br/>2025</span></td></tr><tr><td colspan="3" style="background-color:#cceeff;padding:1.5pt 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">Colowyo Mine assets</span></td><td style="background-color:#cceeff;border-top:1pt solid #000000;padding:1.5pt 0 1.5pt 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">$</span></td><td style="background-color:#cceeff;border-top:1pt solid #000000;padding:1.5pt 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">247,255 </span></td><td style="background-color:#cceeff;border-top:1pt solid #000000;padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"></td><td colspan="3" style="background-color:#cceeff;padding:0 1pt"></td><td style="background-color:#cceeff;border-top:1pt solid #000000;padding:1.5pt 0 1.5pt 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">$</span></td><td style="background-color:#cceeff;border-top:1pt solid #000000;padding:1.5pt 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">297,636 </span></td><td style="background-color:#cceeff;border-top:1pt solid #000000;padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"></td></tr><tr><td colspan="3" style="background-color:#ffffff;padding:1.5pt 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">New Horizon Mine assets</span></td><td colspan="2" style="background-color:#ffffff;padding:1.5pt 0 1.5pt 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">6,287 </span></td><td style="background-color:#ffffff;padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"></td><td colspan="3" style="background-color:#ffffff;padding:0 1pt"></td><td colspan="2" style="background-color:#ffffff;padding:1.5pt 0 1.5pt 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">6,287 </span></td><td style="background-color:#ffffff;padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"></td></tr><tr><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td></tr><tr><td colspan="3" style="background-color:#cceeff;padding:1.5pt 1pt 1.5pt 12.25pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">Accumulated depreciation and depletion</span></td><td colspan="2" style="background-color:#cceeff;padding:1.5pt 0 1.5pt 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">(197,058)</span></td><td style="background-color:#cceeff;padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"></td><td colspan="3" style="background-color:#cceeff;padding:0 1pt"></td><td colspan="2" style="background-color:#cceeff;padding:1.5pt 0 1.5pt 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">(232,575)</span></td><td style="background-color:#cceeff;padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"></td></tr><tr><td colspan="3" style="background-color:#ffffff;padding:1.5pt 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:700;line-height:100%">Net mine assets</span></td><td colspan="2" style="background-color:#ffffff;border-top:1pt solid #000000;padding:1.5pt 0 1.5pt 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:700;line-height:100%">56,484</span><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%"> </span></td><td style="background-color:#ffffff;border-top:1pt solid #000000;padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"></td><td colspan="3" style="background-color:#ffffff;padding:0 1pt"></td><td colspan="2" style="background-color:#ffffff;border-top:1pt solid #000000;padding:1.5pt 0 1.5pt 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:700;line-height:100%">71,348</span><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%"> </span></td><td style="background-color:#ffffff;border-top:1pt solid #000000;padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"></td></tr><tr><td colspan="3" style="background-color:#cceeff;padding:1.5pt 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">Non-utility assets</span></td><td colspan="2" style="background-color:#cceeff;padding:1.5pt 0 1.5pt 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">551,402 </span></td><td style="background-color:#cceeff;padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"></td><td colspan="3" style="background-color:#cceeff;padding:0 1pt"></td><td colspan="2" style="background-color:#cceeff;padding:1.5pt 0 1.5pt 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">549,487 </span></td><td style="background-color:#cceeff;padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"></td></tr><tr><td colspan="3" style="background-color:#ffffff;padding:1.5pt 1pt 1.5pt 12.25pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">Accumulated depreciation</span></td><td colspan="2" style="background-color:#ffffff;padding:1.5pt 0 1.5pt 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">(528,030)</span></td><td style="background-color:#ffffff;padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"></td><td colspan="3" style="background-color:#ffffff;padding:0 1pt"></td><td colspan="2" style="background-color:#ffffff;padding:1.5pt 0 1.5pt 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">(527,902)</span></td><td style="background-color:#ffffff;padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"></td></tr><tr><td colspan="3" style="background-color:#cceeff;padding:1.5pt 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:700;line-height:100%">Net non-utility assets</span></td><td colspan="2" style="background-color:#cceeff;border-top:1pt solid #000000;padding:1.5pt 0 1.5pt 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:700;line-height:100%">23,372</span><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%"> </span></td><td style="background-color:#cceeff;border-top:1pt solid #000000;padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"></td><td colspan="3" style="background-color:#cceeff;padding:0 1pt"></td><td colspan="2" style="background-color:#cceeff;border-top:1pt solid #000000;padding:1.5pt 0 1.5pt 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:700;line-height:100%">21,585</span><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%"> </span></td><td style="background-color:#cceeff;border-top:1pt solid #000000;padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"></td></tr><tr><td colspan="3" style="background-color:#ffffff;padding:1.5pt 1pt 1.5pt 12.25pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:700;line-height:100%">Net other plant</span></td><td style="background-color:#ffffff;border-bottom:3pt double #000000;border-top:1pt solid #000000;padding:1.5pt 0 1.5pt 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:700;line-height:100%">$</span></td><td style="background-color:#ffffff;border-bottom:3pt double #000000;border-top:1pt solid #000000;padding:1.5pt 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:700;line-height:100%">79,856</span><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%"> </span></td><td style="background-color:#ffffff;border-bottom:3pt double #000000;border-top:1pt solid #000000;padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"></td><td colspan="3" style="background-color:#ffffff;padding:0 1pt"></td><td style="background-color:#ffffff;border-bottom:3pt double #000000;border-top:1pt solid #000000;padding:1.5pt 0 1.5pt 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:700;line-height:100%">$</span></td><td style="background-color:#ffffff;border-bottom:3pt double #000000;border-top:1pt solid #000000;padding:1.5pt 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:700;line-height:100%">92,933</span><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%"> </span></td><td style="background-color:#ffffff;border-bottom:3pt double #000000;border-top:1pt solid #000000;padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"></td></tr></table></div> 247255000 297636000 6287000 6287000 197058000 232575000 56484000 71348000 551402000 549487000 528030000 527902000 23372000 21585000 79856000 92933000 INVESTMENTS IN OTHER ASSOCIATIONS<div style="margin-top:10pt;text-indent:36pt"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%">Investments in other associations include investments in the patronage capital of other cooperatives and other required investments in the organizations. Tri-State's investment in a cooperative increases when a cooperative allocates patronage capital credits to Tri-State and it decreases when Tri-State receives a cash retirement of the allocated capital credits from the cooperative. A cooperative allocates its patronage capital credits to Tri-State based upon its patronage (amount of business done) with the cooperative.</span></div><div style="margin-top:10pt;text-indent:36pt"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%">Investments in other associations are as follows (dollars in thousands):</span></div><div style="margin-top:5pt"><table style="border-collapse:collapse;display:inline-table;margin-bottom:5pt;vertical-align:text-bottom;width:100.000%"><tr><td style="width:1.0%"></td><td style="width:64.543%"></td><td style="width:0.1%"></td><td style="width:1.0%"></td><td style="width:15.712%"></td><td style="width:0.1%"></td><td style="width:0.1%"></td><td style="width:0.530%"></td><td style="width:0.1%"></td><td style="width:1.0%"></td><td style="width:15.715%"></td><td style="width:0.1%"></td></tr><tr><td colspan="3" style="padding:0 1pt"></td><td colspan="3" style="padding:1.5pt 1pt;text-align:center;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:700;line-height:100%">September 30,<br/>2026</span></td><td colspan="3" style="padding:0 1pt"></td><td colspan="3" style="padding:1.5pt 1pt;text-align:center;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:700;line-height:100%">December 31,<br/>2025</span></td></tr><tr><td colspan="3" style="background-color:#cceeff;padding:1.5pt 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">Basin Electric Power Cooperative</span></td><td style="background-color:#cceeff;border-top:1pt solid #000000;padding:1.5pt 0 1.5pt 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">$</span></td><td style="background-color:#cceeff;border-top:1pt solid #000000;padding:1.5pt 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">142,457 </span></td><td style="background-color:#cceeff;border-top:1pt solid #000000;padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"></td><td colspan="3" style="background-color:#cceeff;padding:0 1pt"></td><td style="background-color:#cceeff;border-top:1pt solid #000000;padding:1.5pt 0 1.5pt 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">$</span></td><td style="background-color:#cceeff;border-top:1pt solid #000000;padding:1.5pt 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">142,457 </span></td><td style="background-color:#cceeff;border-top:1pt solid #000000;padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"></td></tr><tr><td colspan="3" style="background-color:#ffffff;padding:1.5pt 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">National Rural Utilities Cooperative Finance Corporation - patronage capital</span></td><td colspan="2" style="background-color:#ffffff;padding:1.5pt 0 1.5pt 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">12,836 </span></td><td style="background-color:#ffffff;padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"></td><td colspan="3" style="background-color:#ffffff;padding:0 1pt"></td><td colspan="2" style="background-color:#ffffff;padding:1.5pt 0 1.5pt 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">12,755 </span></td><td style="background-color:#ffffff;padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"></td></tr><tr><td colspan="3" style="background-color:#cceeff;padding:1.5pt 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">National Rural Utilities Cooperative Finance Corporation - capital term certificates</span></td><td colspan="2" style="background-color:#cceeff;padding:1.5pt 0 1.5pt 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">14,395 </span></td><td style="background-color:#cceeff;padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"></td><td colspan="3" style="background-color:#cceeff;padding:0 1pt"></td><td colspan="2" style="background-color:#cceeff;padding:1.5pt 0 1.5pt 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">14,395 </span></td><td style="background-color:#cceeff;padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"></td></tr><tr><td colspan="3" style="background-color:#ffffff;padding:1.5pt 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">CoBank, ACB</span></td><td colspan="2" style="background-color:#ffffff;padding:1.5pt 0 1.5pt 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">18,846 </span></td><td style="background-color:#ffffff;padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"></td><td colspan="3" style="background-color:#ffffff;padding:0 1pt"></td><td colspan="2" style="background-color:#ffffff;padding:1.5pt 0 1.5pt 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">20,050 </span></td><td style="background-color:#ffffff;padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"></td></tr><tr><td colspan="3" style="background-color:#cceeff;padding:1.5pt 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">Other</span></td><td colspan="2" style="background-color:#cceeff;padding:1.5pt 0 1.5pt 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">5,162 </span></td><td style="background-color:#cceeff;padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"></td><td colspan="3" style="background-color:#cceeff;padding:0 1pt"></td><td colspan="2" style="background-color:#cceeff;padding:1.5pt 0 1.5pt 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">5,168 </span></td><td style="background-color:#cceeff;padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"></td></tr><tr><td colspan="3" style="background-color:#ffffff;padding:1.5pt 1pt 1.5pt 12.25pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:700;line-height:100%">Investments in other associations</span></td><td style="background-color:#ffffff;border-bottom:3pt double #000000;border-top:1pt solid #000000;padding:1.5pt 0 1.5pt 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:700;line-height:100%">$</span></td><td style="background-color:#ffffff;border-bottom:3pt double #000000;border-top:1pt solid #000000;padding:1.5pt 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:700;line-height:100%">193,696</span><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%"> </span></td><td style="background-color:#ffffff;border-bottom:3pt double #000000;border-top:1pt solid #000000;padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"></td><td colspan="3" style="background-color:#ffffff;padding:0 1pt"></td><td style="background-color:#ffffff;border-bottom:3pt double #000000;border-top:1pt solid #000000;padding:1.5pt 0 1.5pt 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:700;line-height:100%">$</span></td><td style="background-color:#ffffff;border-bottom:3pt double #000000;border-top:1pt solid #000000;padding:1.5pt 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:700;line-height:100%">194,825</span><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%"> </span></td><td style="background-color:#ffffff;border-bottom:3pt double #000000;border-top:1pt solid #000000;padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"></td></tr></table></div><div style="margin-top:10pt;text-indent:36pt"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%">Tri-State's investments in other associations are considered equity securities without readily determinable fair values, and as such are measured at cost minus impairment. Tri-State has evaluated these investments for indicators of impairment. There were no impairments of these investments recognized during the nine months ended September 30, 2026 or during 2025.</span></div> <div style="margin-top:10pt;text-indent:36pt"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%">Investments in other associations are as follows (dollars in thousands):</span></div><div style="margin-top:5pt"><table style="border-collapse:collapse;display:inline-table;margin-bottom:5pt;vertical-align:text-bottom;width:100.000%"><tr><td style="width:1.0%"></td><td style="width:64.543%"></td><td style="width:0.1%"></td><td style="width:1.0%"></td><td style="width:15.712%"></td><td style="width:0.1%"></td><td style="width:0.1%"></td><td style="width:0.530%"></td><td style="width:0.1%"></td><td style="width:1.0%"></td><td style="width:15.715%"></td><td style="width:0.1%"></td></tr><tr><td colspan="3" style="padding:0 1pt"></td><td colspan="3" style="padding:1.5pt 1pt;text-align:center;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:700;line-height:100%">September 30,<br/>2026</span></td><td colspan="3" style="padding:0 1pt"></td><td colspan="3" style="padding:1.5pt 1pt;text-align:center;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:700;line-height:100%">December 31,<br/>2025</span></td></tr><tr><td colspan="3" style="background-color:#cceeff;padding:1.5pt 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">Basin Electric Power Cooperative</span></td><td style="background-color:#cceeff;border-top:1pt solid #000000;padding:1.5pt 0 1.5pt 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">$</span></td><td style="background-color:#cceeff;border-top:1pt solid #000000;padding:1.5pt 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">142,457 </span></td><td style="background-color:#cceeff;border-top:1pt solid #000000;padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"></td><td colspan="3" style="background-color:#cceeff;padding:0 1pt"></td><td style="background-color:#cceeff;border-top:1pt solid #000000;padding:1.5pt 0 1.5pt 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">$</span></td><td style="background-color:#cceeff;border-top:1pt solid #000000;padding:1.5pt 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">142,457 </span></td><td style="background-color:#cceeff;border-top:1pt solid #000000;padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"></td></tr><tr><td colspan="3" style="background-color:#ffffff;padding:1.5pt 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">National Rural Utilities Cooperative Finance Corporation - patronage capital</span></td><td colspan="2" style="background-color:#ffffff;padding:1.5pt 0 1.5pt 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">12,836 </span></td><td style="background-color:#ffffff;padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"></td><td colspan="3" style="background-color:#ffffff;padding:0 1pt"></td><td colspan="2" style="background-color:#ffffff;padding:1.5pt 0 1.5pt 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">12,755 </span></td><td style="background-color:#ffffff;padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"></td></tr><tr><td colspan="3" style="background-color:#cceeff;padding:1.5pt 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">National Rural Utilities Cooperative Finance Corporation - capital term certificates</span></td><td colspan="2" style="background-color:#cceeff;padding:1.5pt 0 1.5pt 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">14,395 </span></td><td style="background-color:#cceeff;padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"></td><td colspan="3" style="background-color:#cceeff;padding:0 1pt"></td><td colspan="2" style="background-color:#cceeff;padding:1.5pt 0 1.5pt 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">14,395 </span></td><td style="background-color:#cceeff;padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"></td></tr><tr><td colspan="3" style="background-color:#ffffff;padding:1.5pt 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">CoBank, ACB</span></td><td colspan="2" style="background-color:#ffffff;padding:1.5pt 0 1.5pt 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">18,846 </span></td><td style="background-color:#ffffff;padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"></td><td colspan="3" style="background-color:#ffffff;padding:0 1pt"></td><td colspan="2" style="background-color:#ffffff;padding:1.5pt 0 1.5pt 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">20,050 </span></td><td style="background-color:#ffffff;padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"></td></tr><tr><td colspan="3" style="background-color:#cceeff;padding:1.5pt 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">Other</span></td><td colspan="2" style="background-color:#cceeff;padding:1.5pt 0 1.5pt 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">5,162 </span></td><td style="background-color:#cceeff;padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"></td><td colspan="3" style="background-color:#cceeff;padding:0 1pt"></td><td colspan="2" style="background-color:#cceeff;padding:1.5pt 0 1.5pt 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">5,168 </span></td><td style="background-color:#cceeff;padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"></td></tr><tr><td colspan="3" style="background-color:#ffffff;padding:1.5pt 1pt 1.5pt 12.25pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:700;line-height:100%">Investments in other associations</span></td><td style="background-color:#ffffff;border-bottom:3pt double #000000;border-top:1pt solid #000000;padding:1.5pt 0 1.5pt 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:700;line-height:100%">$</span></td><td style="background-color:#ffffff;border-bottom:3pt double #000000;border-top:1pt solid #000000;padding:1.5pt 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:700;line-height:100%">193,696</span><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%"> </span></td><td style="background-color:#ffffff;border-bottom:3pt double #000000;border-top:1pt solid #000000;padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"></td><td colspan="3" style="background-color:#ffffff;padding:0 1pt"></td><td style="background-color:#ffffff;border-bottom:3pt double #000000;border-top:1pt solid #000000;padding:1.5pt 0 1.5pt 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:700;line-height:100%">$</span></td><td style="background-color:#ffffff;border-bottom:3pt double #000000;border-top:1pt solid #000000;padding:1.5pt 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:700;line-height:100%">194,825</span><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%"> </span></td><td style="background-color:#ffffff;border-bottom:3pt double #000000;border-top:1pt solid #000000;padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"></td></tr></table></div> 142457000 142457000 12836000 12755000 14395000 14395000 18846000 20050000 5162000 5168000 193696000 194825000 0 0 CASH, CASH EQUIVALENTS AND RESTRICTED CASH AND INVESTMENTS<div style="margin-top:10pt;text-indent:36pt"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%">Tri-State considers highly liquid investments with an original maturity of three months or less to be cash equivalents. The fair value of cash equivalents approximates their carrying values due to their short-term maturity.</span></div><div style="margin-top:10pt;text-indent:36pt"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%">Restricted cash and investments represent funds designated by Tri-State's Board for specific uses and funds restricted by contract or other legal reasons. A portion of the funds are amounts that have been restricted by contract that are expected to be settled within one year. These funds are therefore classified as current on Tri-State's consolidated statements of financial position. The other funds are for amounts restricted by contract or other legal reasons that are expected to be settled beyond one year. These funds are classified as noncurrent and are included in other assets and investments on Tri-State's consolidated statements of financial position.</span></div><div style="margin-top:10pt;text-indent:36pt"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%">The following table provides a reconciliation of cash, cash equivalents and restricted cash and investments reported within Tri-State's consolidated statements of financial position that sum to the total of the same such amount shown in its consolidated statements of cash flows (dollars in thousands):</span></div><div style="margin-top:5pt"><table style="border-collapse:collapse;display:inline-table;margin-bottom:5pt;vertical-align:text-bottom;width:100.000%"><tr><td style="width:1.0%"></td><td style="width:64.543%"></td><td style="width:0.1%"></td><td style="width:1.0%"></td><td style="width:15.712%"></td><td style="width:0.1%"></td><td style="width:0.1%"></td><td style="width:0.530%"></td><td style="width:0.1%"></td><td style="width:1.0%"></td><td style="width:15.715%"></td><td style="width:0.1%"></td></tr><tr><td colspan="3" style="padding:0 1pt"></td><td colspan="3" style="padding:1.5pt 1pt;text-align:center;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:700;line-height:100%">September 30,<br/>2026</span></td><td colspan="3" style="padding:0 1pt"></td><td colspan="3" style="padding:1.5pt 1pt;text-align:center;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:700;line-height:100%">December 31,<br/>2025</span></td></tr><tr><td colspan="3" style="background-color:#cceeff;padding:1.5pt 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%">Cash and cash equivalents</span></td><td style="background-color:#cceeff;border-top:1pt solid #000000;padding:1.5pt 0 1.5pt 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%">$</span></td><td style="background-color:#cceeff;border-top:1pt solid #000000;padding:1.5pt 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%">218,696 </span></td><td style="background-color:#cceeff;border-top:1pt solid #000000;padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"></td><td colspan="3" style="background-color:#cceeff;padding:0 1pt"></td><td style="background-color:#cceeff;border-top:1pt solid #000000;padding:1.5pt 0 1.5pt 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%">$</span></td><td style="background-color:#cceeff;border-top:1pt solid #000000;padding:1.5pt 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%">177,557 </span></td><td style="background-color:#cceeff;border-top:1pt solid #000000;padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"></td></tr><tr><td colspan="3" style="padding:1.5pt 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%">Restricted cash and investments - current</span></td><td colspan="2" style="padding:1.5pt 0 1.5pt 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%">17,940 </span></td><td style="padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"></td><td colspan="3" style="padding:0 1pt"></td><td colspan="2" style="padding:1.5pt 0 1.5pt 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%">1,111 </span></td><td style="padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"></td></tr><tr><td colspan="3" style="background-color:#cceeff;padding:1.5pt 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%">Restricted cash and investments - noncurrent</span></td><td colspan="2" style="background-color:#cceeff;padding:1.5pt 0 1.5pt 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%">1,468 </span></td><td style="background-color:#cceeff;padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"></td><td colspan="3" style="background-color:#cceeff;padding:0 1pt"></td><td colspan="2" style="background-color:#cceeff;padding:1.5pt 0 1.5pt 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%">2,137 </span></td><td style="background-color:#cceeff;padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"></td></tr><tr><td colspan="3" style="padding:1.5pt 1pt 1.5pt 12.25pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:700;line-height:120%">Cash, cash equivalents and restricted cash and investments</span></td><td style="border-bottom:3pt double #000000;border-top:1pt solid #000000;padding:1.5pt 0 1.5pt 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:700;line-height:120%">$</span></td><td style="border-bottom:3pt double #000000;border-top:1pt solid #000000;padding:1.5pt 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:700;line-height:120%">238,104</span><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%"> </span></td><td style="border-bottom:3pt double #000000;border-top:1pt solid #000000;padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"></td><td colspan="3" style="padding:0 1pt"></td><td style="border-bottom:3pt double #000000;border-top:1pt solid #000000;padding:1.5pt 0 1.5pt 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:700;line-height:120%">$</span></td><td style="border-bottom:3pt double #000000;border-top:1pt solid #000000;padding:1.5pt 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:700;line-height:120%">180,805</span><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%"> </span></td><td style="border-bottom:3pt double #000000;border-top:1pt solid #000000;padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"></td></tr></table></div> <div style="margin-top:10pt;text-indent:36pt"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%">The following table provides a reconciliation of cash, cash equivalents and restricted cash and investments reported within Tri-State's consolidated statements of financial position that sum to the total of the same such amount shown in its consolidated statements of cash flows (dollars in thousands):</span></div><div style="margin-top:5pt"><table style="border-collapse:collapse;display:inline-table;margin-bottom:5pt;vertical-align:text-bottom;width:100.000%"><tr><td style="width:1.0%"></td><td style="width:64.543%"></td><td style="width:0.1%"></td><td style="width:1.0%"></td><td style="width:15.712%"></td><td style="width:0.1%"></td><td style="width:0.1%"></td><td style="width:0.530%"></td><td style="width:0.1%"></td><td style="width:1.0%"></td><td style="width:15.715%"></td><td style="width:0.1%"></td></tr><tr><td colspan="3" style="padding:0 1pt"></td><td colspan="3" style="padding:1.5pt 1pt;text-align:center;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:700;line-height:100%">September 30,<br/>2026</span></td><td colspan="3" style="padding:0 1pt"></td><td colspan="3" style="padding:1.5pt 1pt;text-align:center;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:700;line-height:100%">December 31,<br/>2025</span></td></tr><tr><td colspan="3" style="background-color:#cceeff;padding:1.5pt 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%">Cash and cash equivalents</span></td><td style="background-color:#cceeff;border-top:1pt solid #000000;padding:1.5pt 0 1.5pt 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%">$</span></td><td style="background-color:#cceeff;border-top:1pt solid #000000;padding:1.5pt 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%">218,696 </span></td><td style="background-color:#cceeff;border-top:1pt solid #000000;padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"></td><td colspan="3" style="background-color:#cceeff;padding:0 1pt"></td><td style="background-color:#cceeff;border-top:1pt solid #000000;padding:1.5pt 0 1.5pt 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%">$</span></td><td style="background-color:#cceeff;border-top:1pt solid #000000;padding:1.5pt 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%">177,557 </span></td><td style="background-color:#cceeff;border-top:1pt solid #000000;padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"></td></tr><tr><td colspan="3" style="padding:1.5pt 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%">Restricted cash and investments - current</span></td><td colspan="2" style="padding:1.5pt 0 1.5pt 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%">17,940 </span></td><td style="padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"></td><td colspan="3" style="padding:0 1pt"></td><td colspan="2" style="padding:1.5pt 0 1.5pt 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%">1,111 </span></td><td style="padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"></td></tr><tr><td colspan="3" style="background-color:#cceeff;padding:1.5pt 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%">Restricted cash and investments - noncurrent</span></td><td colspan="2" style="background-color:#cceeff;padding:1.5pt 0 1.5pt 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%">1,468 </span></td><td style="background-color:#cceeff;padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"></td><td colspan="3" style="background-color:#cceeff;padding:0 1pt"></td><td colspan="2" style="background-color:#cceeff;padding:1.5pt 0 1.5pt 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%">2,137 </span></td><td style="background-color:#cceeff;padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"></td></tr><tr><td colspan="3" style="padding:1.5pt 1pt 1.5pt 12.25pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:700;line-height:120%">Cash, cash equivalents and restricted cash and investments</span></td><td style="border-bottom:3pt double #000000;border-top:1pt solid #000000;padding:1.5pt 0 1.5pt 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:700;line-height:120%">$</span></td><td style="border-bottom:3pt double #000000;border-top:1pt solid #000000;padding:1.5pt 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:700;line-height:120%">238,104</span><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%"> </span></td><td style="border-bottom:3pt double #000000;border-top:1pt solid #000000;padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"></td><td colspan="3" style="padding:0 1pt"></td><td style="border-bottom:3pt double #000000;border-top:1pt solid #000000;padding:1.5pt 0 1.5pt 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:700;line-height:120%">$</span></td><td style="border-bottom:3pt double #000000;border-top:1pt solid #000000;padding:1.5pt 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:700;line-height:120%">180,805</span><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%"> </span></td><td style="border-bottom:3pt double #000000;border-top:1pt solid #000000;padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"></td></tr></table></div> 218696000 177557000 17940000 1111000 1468000 2137000 238104000 180805000 CONTRACT ASSETS AND CONTRACT LIABILITIES<div style="margin-top:10pt;padding-left:18pt"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-style:italic;font-weight:400;line-height:120%">Contract Assets</span></div><div style="margin-top:10pt;text-indent:36pt"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%">A contract asset represents an entity's right to consideration in exchange for goods or services that the entity has transferred to a customer when that right is conditioned on something other than the passage of time (for example, the entity's future performance). Tri-State had no contract assets as of September 30, 2026 and December 31, 2025.</span></div><div style="margin-top:10pt;padding-left:18pt"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-style:italic;font-weight:400;line-height:120%">Accounts Receivable</span></div><div style="margin-top:10pt;text-indent:36pt"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%">Tri-State records accounts receivable for its unconditional rights to consideration arising from its performance under contracts with the Members and other parties. Uncollectible amounts, if any, are identified on a specific basis and charged to expense in the period determined to be uncollectible. See Note 13 – Revenue.</span></div><div style="margin-top:10pt;padding-left:18pt"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-style:italic;font-weight:400;line-height:120%">Contract liabilities (unearned revenue)</span></div><div style="margin-top:10pt;text-indent:36pt"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%">A contract liability represents an entity’s obligation to transfer goods or services to a customer for which the entity has received consideration from the customer. Tri-State has received deposits from others and these deposits are reflected in unearned revenue (included in other deferred credits and other liabilities on Tri-State's consolidated statements of financial position) before revenue is recognized, resulting in contract liabilities. During the nine months ended September 30, 2026, Tri-State recognized $0.3 million of this unearned revenue in other operating revenues on its consolidated statements of operations.</span></div><div style="margin-top:10pt;text-indent:36pt"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%">Tri-State's contract assets and liabilities consist of the following (dollars in thousands):</span></div><div style="margin-top:5pt"><table style="border-collapse:collapse;display:inline-table;margin-bottom:5pt;vertical-align:text-bottom;width:100.000%"><tr><td style="width:1.0%"></td><td style="width:64.543%"></td><td style="width:0.1%"></td><td style="width:1.0%"></td><td style="width:15.712%"></td><td style="width:0.1%"></td><td style="width:0.1%"></td><td style="width:0.530%"></td><td style="width:0.1%"></td><td style="width:1.0%"></td><td style="width:15.715%"></td><td style="width:0.1%"></td></tr><tr><td colspan="3" style="padding:0 1pt"></td><td colspan="3" style="padding:1.5pt 1pt;text-align:center;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:700;line-height:100%">September 30,<br/>2026</span></td><td colspan="3" style="padding:0 1pt"></td><td colspan="3" style="padding:1.5pt 1pt;text-align:center;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:700;line-height:100%">December 31,<br/>2025</span></td></tr><tr><td colspan="3" style="background-color:#cceeff;padding:1.5pt 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:700;line-height:100%">Accounts receivable - Utility Members</span></td><td style="background-color:#cceeff;border-top:1pt solid #000000;padding:1.5pt 0 1.5pt 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:700;line-height:100%">$</span></td><td style="background-color:#cceeff;border-top:1pt solid #000000;padding:1.5pt 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:700;line-height:100%">94,592</span><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%"> </span></td><td style="background-color:#cceeff;border-top:1pt solid #000000;padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"></td><td colspan="3" style="background-color:#cceeff;padding:0 1pt"></td><td style="background-color:#cceeff;border-top:1pt solid #000000;padding:1.5pt 0 1.5pt 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:700;line-height:100%">$</span></td><td style="background-color:#cceeff;border-top:1pt solid #000000;padding:1.5pt 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:700;line-height:100%">83,743</span><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%"> </span></td><td style="background-color:#cceeff;border-top:1pt solid #000000;padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"></td></tr><tr style="height:14pt"><td colspan="3" style="padding:0 1pt"></td><td colspan="3" style="border-top:3pt double #000000;padding:0 1pt"></td><td colspan="3" style="padding:0 1pt"></td><td colspan="3" style="border-top:3pt double #000000;padding:0 1pt"></td></tr><tr><td colspan="3" style="background-color:#cceeff;padding:1.5pt 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:700;line-height:100%">Other accounts receivable - trade:</span></td><td colspan="3" style="background-color:#cceeff;padding:0 1pt"></td><td colspan="3" style="background-color:#cceeff;padding:0 1pt"></td><td colspan="3" style="background-color:#cceeff;padding:0 1pt"></td></tr><tr><td colspan="3" style="padding:1.5pt 1pt 1.5pt 12.25pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">Non-member electric sales and transmission</span></td><td colspan="2" style="padding:1.5pt 0 1.5pt 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">47,985 </span></td><td style="padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"></td><td colspan="3" style="padding:0 1pt"></td><td colspan="2" style="padding:1.5pt 0 1.5pt 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">20,921 </span></td><td style="padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"></td></tr><tr><td colspan="3" style="background-color:#cceeff;padding:1.5pt 1pt 1.5pt 12.25pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">Other</span></td><td colspan="2" style="background-color:#cceeff;padding:1.5pt 0 1.5pt 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">6,981 </span></td><td style="background-color:#cceeff;padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"></td><td colspan="3" style="background-color:#cceeff;padding:0 1pt"></td><td colspan="2" style="background-color:#cceeff;padding:1.5pt 0 1.5pt 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">3,807 </span></td><td style="background-color:#cceeff;padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"></td></tr><tr><td colspan="3" style="padding:1.5pt 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:700;line-height:100%">Total other accounts receivable - trade</span></td><td colspan="2" style="border-top:1pt solid #000000;padding:1.5pt 0 1.5pt 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:700;line-height:100%">54,966</span><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%"> </span></td><td style="border-top:1pt solid #000000;padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"></td><td colspan="3" style="padding:0 1pt"></td><td colspan="2" style="border-top:1pt solid #000000;padding:1.5pt 0 1.5pt 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:700;line-height:100%">24,728</span><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%"> </span></td><td style="border-top:1pt solid #000000;padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"></td></tr><tr><td colspan="3" style="background-color:#cceeff;padding:1.5pt 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">Other accounts receivable - non-trade</span></td><td colspan="2" style="background-color:#cceeff;padding:1.5pt 0 1.5pt 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">22,093 </span></td><td style="background-color:#cceeff;padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"></td><td colspan="3" style="background-color:#cceeff;padding:0 1pt"></td><td colspan="2" style="background-color:#cceeff;padding:1.5pt 0 1.5pt 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">8,164 </span></td><td style="background-color:#cceeff;padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"></td></tr><tr><td colspan="3" style="padding:1.5pt 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:700;line-height:100%">Total other accounts receivable</span></td><td style="border-top:1pt solid #000000;padding:1.5pt 0 1.5pt 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:700;line-height:100%">$</span></td><td style="border-top:1pt solid #000000;padding:1.5pt 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:700;line-height:100%">77,059</span><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%"> </span></td><td style="border-top:1pt solid #000000;padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"></td><td colspan="3" style="padding:0 1pt"></td><td style="border-top:1pt solid #000000;padding:1.5pt 0 1.5pt 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:700;line-height:100%">$</span></td><td style="border-top:1pt solid #000000;padding:1.5pt 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:700;line-height:100%">32,892</span><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%"> </span></td><td style="border-top:1pt solid #000000;padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"></td></tr><tr style="height:14pt"><td colspan="3" style="background-color:#cceeff;padding:0 1pt"></td><td colspan="3" style="background-color:#cceeff;border-top:3pt double #000000;padding:0 1pt"></td><td colspan="3" style="background-color:#cceeff;padding:0 1pt"></td><td colspan="3" style="background-color:#cceeff;border-top:3pt double #000000;padding:0 1pt"></td></tr><tr><td colspan="3" style="padding:1.5pt 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:700;line-height:100%">Contract liabilities (unearned revenue)</span></td><td style="border-bottom:3pt double #000000;padding:1.5pt 0 1.5pt 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:700;line-height:100%">$</span></td><td style="border-bottom:3pt double #000000;padding:1.5pt 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:700;line-height:100%">2,807</span><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%"> </span></td><td style="border-bottom:3pt double #000000;padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"></td><td colspan="3" style="padding:0 1pt"></td><td style="border-bottom:3pt double #000000;padding:1.5pt 0 1.5pt 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:700;line-height:100%">$</span></td><td style="border-bottom:3pt double #000000;padding:1.5pt 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:700;line-height:100%">3,182</span><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%"> </span></td><td style="border-bottom:3pt double #000000;padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"></td></tr></table></div> 300000 <div style="margin-top:10pt;text-indent:36pt"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%">Tri-State's contract assets and liabilities consist of the following (dollars in thousands):</span></div><div style="margin-top:5pt"><table style="border-collapse:collapse;display:inline-table;margin-bottom:5pt;vertical-align:text-bottom;width:100.000%"><tr><td style="width:1.0%"></td><td style="width:64.543%"></td><td style="width:0.1%"></td><td style="width:1.0%"></td><td style="width:15.712%"></td><td style="width:0.1%"></td><td style="width:0.1%"></td><td style="width:0.530%"></td><td style="width:0.1%"></td><td style="width:1.0%"></td><td style="width:15.715%"></td><td style="width:0.1%"></td></tr><tr><td colspan="3" style="padding:0 1pt"></td><td colspan="3" style="padding:1.5pt 1pt;text-align:center;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:700;line-height:100%">September 30,<br/>2026</span></td><td colspan="3" style="padding:0 1pt"></td><td colspan="3" style="padding:1.5pt 1pt;text-align:center;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:700;line-height:100%">December 31,<br/>2025</span></td></tr><tr><td colspan="3" style="background-color:#cceeff;padding:1.5pt 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:700;line-height:100%">Accounts receivable - Utility Members</span></td><td style="background-color:#cceeff;border-top:1pt solid #000000;padding:1.5pt 0 1.5pt 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:700;line-height:100%">$</span></td><td style="background-color:#cceeff;border-top:1pt solid #000000;padding:1.5pt 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:700;line-height:100%">94,592</span><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%"> </span></td><td style="background-color:#cceeff;border-top:1pt solid #000000;padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"></td><td colspan="3" style="background-color:#cceeff;padding:0 1pt"></td><td style="background-color:#cceeff;border-top:1pt solid #000000;padding:1.5pt 0 1.5pt 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:700;line-height:100%">$</span></td><td style="background-color:#cceeff;border-top:1pt solid #000000;padding:1.5pt 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:700;line-height:100%">83,743</span><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%"> </span></td><td style="background-color:#cceeff;border-top:1pt solid #000000;padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"></td></tr><tr style="height:14pt"><td colspan="3" style="padding:0 1pt"></td><td colspan="3" style="border-top:3pt double #000000;padding:0 1pt"></td><td colspan="3" style="padding:0 1pt"></td><td colspan="3" style="border-top:3pt double #000000;padding:0 1pt"></td></tr><tr><td colspan="3" style="background-color:#cceeff;padding:1.5pt 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:700;line-height:100%">Other accounts receivable - trade:</span></td><td colspan="3" style="background-color:#cceeff;padding:0 1pt"></td><td colspan="3" style="background-color:#cceeff;padding:0 1pt"></td><td colspan="3" style="background-color:#cceeff;padding:0 1pt"></td></tr><tr><td colspan="3" style="padding:1.5pt 1pt 1.5pt 12.25pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">Non-member electric sales and transmission</span></td><td colspan="2" style="padding:1.5pt 0 1.5pt 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">47,985 </span></td><td style="padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"></td><td colspan="3" style="padding:0 1pt"></td><td colspan="2" style="padding:1.5pt 0 1.5pt 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">20,921 </span></td><td style="padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"></td></tr><tr><td colspan="3" style="background-color:#cceeff;padding:1.5pt 1pt 1.5pt 12.25pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">Other</span></td><td colspan="2" style="background-color:#cceeff;padding:1.5pt 0 1.5pt 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">6,981 </span></td><td style="background-color:#cceeff;padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"></td><td colspan="3" style="background-color:#cceeff;padding:0 1pt"></td><td colspan="2" style="background-color:#cceeff;padding:1.5pt 0 1.5pt 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">3,807 </span></td><td style="background-color:#cceeff;padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"></td></tr><tr><td colspan="3" style="padding:1.5pt 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:700;line-height:100%">Total other accounts receivable - trade</span></td><td colspan="2" style="border-top:1pt solid #000000;padding:1.5pt 0 1.5pt 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:700;line-height:100%">54,966</span><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%"> </span></td><td style="border-top:1pt solid #000000;padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"></td><td colspan="3" style="padding:0 1pt"></td><td colspan="2" style="border-top:1pt solid #000000;padding:1.5pt 0 1.5pt 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:700;line-height:100%">24,728</span><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%"> </span></td><td style="border-top:1pt solid #000000;padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"></td></tr><tr><td colspan="3" style="background-color:#cceeff;padding:1.5pt 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">Other accounts receivable - non-trade</span></td><td colspan="2" style="background-color:#cceeff;padding:1.5pt 0 1.5pt 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">22,093 </span></td><td style="background-color:#cceeff;padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"></td><td colspan="3" style="background-color:#cceeff;padding:0 1pt"></td><td colspan="2" style="background-color:#cceeff;padding:1.5pt 0 1.5pt 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">8,164 </span></td><td style="background-color:#cceeff;padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"></td></tr><tr><td colspan="3" style="padding:1.5pt 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:700;line-height:100%">Total other accounts receivable</span></td><td style="border-top:1pt solid #000000;padding:1.5pt 0 1.5pt 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:700;line-height:100%">$</span></td><td style="border-top:1pt solid #000000;padding:1.5pt 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:700;line-height:100%">77,059</span><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%"> </span></td><td style="border-top:1pt solid #000000;padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"></td><td colspan="3" style="padding:0 1pt"></td><td style="border-top:1pt solid #000000;padding:1.5pt 0 1.5pt 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:700;line-height:100%">$</span></td><td style="border-top:1pt solid #000000;padding:1.5pt 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:700;line-height:100%">32,892</span><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%"> </span></td><td style="border-top:1pt solid #000000;padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"></td></tr><tr style="height:14pt"><td colspan="3" style="background-color:#cceeff;padding:0 1pt"></td><td colspan="3" style="background-color:#cceeff;border-top:3pt double #000000;padding:0 1pt"></td><td colspan="3" style="background-color:#cceeff;padding:0 1pt"></td><td colspan="3" style="background-color:#cceeff;border-top:3pt double #000000;padding:0 1pt"></td></tr><tr><td colspan="3" style="padding:1.5pt 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:700;line-height:100%">Contract liabilities (unearned revenue)</span></td><td style="border-bottom:3pt double #000000;padding:1.5pt 0 1.5pt 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:700;line-height:100%">$</span></td><td style="border-bottom:3pt double #000000;padding:1.5pt 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:700;line-height:100%">2,807</span><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%"> </span></td><td style="border-bottom:3pt double #000000;padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"></td><td colspan="3" style="padding:0 1pt"></td><td style="border-bottom:3pt double #000000;padding:1.5pt 0 1.5pt 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:700;line-height:100%">$</span></td><td style="border-bottom:3pt double #000000;padding:1.5pt 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:700;line-height:100%">3,182</span><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%"> </span></td><td style="border-bottom:3pt double #000000;padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"></td></tr></table></div> 94592000 83743000 47985000 20921000 6981000 3807000 54966000 24728000 22093000 8164000 77059000 32892000 2807000 3182000 OTHER DEFERRED CHARGES<div style="margin-top:10pt;text-indent:36pt"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%">The following other deferred charges are reflected on Tri-State's consolidated statements of financial position (dollars in thousands):</span></div><div style="margin-top:5pt"><table style="border-collapse:collapse;display:inline-table;margin-bottom:5pt;vertical-align:text-bottom;width:100.000%"><tr><td style="width:1.0%"></td><td style="width:64.543%"></td><td style="width:0.1%"></td><td style="width:1.0%"></td><td style="width:15.712%"></td><td style="width:0.1%"></td><td style="width:0.1%"></td><td style="width:0.530%"></td><td style="width:0.1%"></td><td style="width:1.0%"></td><td style="width:15.715%"></td><td style="width:0.1%"></td></tr><tr><td colspan="3" style="padding:0 1pt"></td><td colspan="3" style="padding:1.5pt 1pt;text-align:center;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:700;line-height:100%">September 30,<br/>2026</span></td><td colspan="3" style="padding:0 1pt"></td><td colspan="3" style="padding:1.5pt 1pt;text-align:center;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:700;line-height:100%">December 31,<br/>2025</span></td></tr><tr><td colspan="3" style="background-color:#cceeff;padding:1.5pt 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%">Preliminary surveys and investigations</span></td><td style="background-color:#cceeff;border-top:1pt solid #000000;padding:1.5pt 0 1.5pt 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%">$</span></td><td style="background-color:#cceeff;border-top:1pt solid #000000;padding:1.5pt 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%">12,527 </span></td><td style="background-color:#cceeff;border-top:1pt solid #000000;padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"></td><td colspan="3" style="background-color:#cceeff;padding:0 1pt"></td><td style="background-color:#cceeff;border-top:1pt solid #000000;padding:1.5pt 0 1.5pt 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%">$</span></td><td style="background-color:#cceeff;border-top:1pt solid #000000;padding:1.5pt 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%">12,988 </span></td><td style="background-color:#cceeff;border-top:1pt solid #000000;padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"></td></tr><tr><td colspan="3" style="background-color:#ffffff;padding:1.5pt 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%">Advances to operating agents of jointly owned facilities</span></td><td colspan="2" style="background-color:#ffffff;padding:1.5pt 0 1.5pt 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%">10,919 </span></td><td style="background-color:#ffffff;padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"></td><td colspan="3" style="background-color:#ffffff;padding:0 1pt"></td><td colspan="2" style="background-color:#ffffff;padding:1.5pt 0 1.5pt 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%">11,210 </span></td><td style="background-color:#ffffff;padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"></td></tr><tr><td colspan="3" style="background-color:#cceeff;padding:1.5pt 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%">Lease right-of-use assets</span></td><td colspan="2" style="background-color:#cceeff;padding:1.5pt 0 1.5pt 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%">10,405 </span></td><td style="background-color:#cceeff;padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"></td><td colspan="3" style="background-color:#cceeff;padding:0 1pt"></td><td colspan="2" style="background-color:#cceeff;padding:1.5pt 0 1.5pt 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%">10,955 </span></td><td style="background-color:#cceeff;padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"></td></tr><tr><td colspan="3" style="background-color:#ffffff;padding:1.5pt 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%">Financial asset - reclamation</span></td><td colspan="2" style="background-color:#ffffff;padding:1.5pt 0 1.5pt 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">17,638 </span></td><td style="background-color:#ffffff;padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"></td><td colspan="3" style="background-color:#ffffff;padding:0 1pt"></td><td colspan="2" style="background-color:#ffffff;padding:1.5pt 0 1.5pt 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">17,027 </span></td><td style="background-color:#ffffff;padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"></td></tr><tr><td colspan="3" style="background-color:#cceeff;padding:1.5pt 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%">Other</span></td><td colspan="2" style="background-color:#cceeff;padding:1.5pt 0 1.5pt 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%">3,680 </span></td><td style="background-color:#cceeff;padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"></td><td colspan="3" style="background-color:#cceeff;padding:0 1pt"></td><td colspan="2" style="background-color:#cceeff;padding:1.5pt 0 1.5pt 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%">6,366 </span></td><td style="background-color:#cceeff;padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"></td></tr><tr><td colspan="3" style="background-color:#ffffff;padding:1.5pt 1pt 1.5pt 7.75pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:700;line-height:120%">Total other deferred charges</span></td><td style="background-color:#ffffff;border-bottom:3pt double #000000;border-top:1pt solid #000;padding:1.5pt 0 1.5pt 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:700;line-height:120%">$</span></td><td style="background-color:#ffffff;border-bottom:3pt double #000000;border-top:1pt solid #000;padding:1.5pt 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:700;line-height:120%">55,169</span><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%"> </span></td><td style="background-color:#ffffff;border-bottom:3pt double #000000;border-top:1pt solid #000;padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"></td><td colspan="3" style="background-color:#ffffff;padding:0 1pt"></td><td style="background-color:#ffffff;border-bottom:3pt double #000000;border-top:1pt solid #000;padding:1.5pt 0 1.5pt 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:700;line-height:120%">$</span></td><td style="background-color:#ffffff;border-bottom:3pt double #000000;border-top:1pt solid #000;padding:1.5pt 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:700;line-height:120%">58,546</span><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%"> </span></td><td style="background-color:#ffffff;border-bottom:3pt double #000000;border-top:1pt solid #000;padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"></td></tr></table></div><div style="margin-top:10pt;text-indent:36pt"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%">Tri-State makes expenditures for preliminary surveys and investigations for the purpose of determining the feasibility of contemplated generation and transmission projects. If construction results, the preliminary survey and investigation expenditures are reclassified to electric plant - construction work in progress. If the work is abandoned, the related preliminary survey and investigation expenditures are charged to the appropriate operating expense account, or the expense could be deferred as a regulatory asset to be recovered from the Utility Members through rates subject to approval by Tri-State's Board and FERC.</span></div><div style="margin-top:10pt;text-indent:36pt"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%">Tri-State makes advance payments to the operating agents of jointly owned facilities to fund its share of costs expected to be incurred under each project including MBPP – Laramie River Station, and Yampa Project – Craig Generating Station Units 1 and 2. Tri-State also makes advance payments to the operating agent of Springerville Unit 3.</span></div><div style="margin-top:10pt;text-indent:36pt"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%">A right-of-use asset represents a lessee’s right to control the use of the underlying asset for the lease term. Right-of-use assets are included in other deferred charges and presented net of accumulated amortization. See Note 15 – Leases.</span></div><div style="margin-top:10pt;text-indent:36pt"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%">Financial asset - reclamation represents a receivable from the joint owners of the Yampa Project - Craig Generating Station for their share of reclamation costs at that facility in which they have undivided interests.</span><span style="font-family:'Times New Roman',serif;font-size:1pt;font-weight:400;line-height:120%"></span></div> <div style="margin-top:10pt;text-indent:36pt"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%">The following other deferred charges are reflected on Tri-State's consolidated statements of financial position (dollars in thousands):</span></div><div style="margin-top:5pt"><table style="border-collapse:collapse;display:inline-table;margin-bottom:5pt;vertical-align:text-bottom;width:100.000%"><tr><td style="width:1.0%"></td><td style="width:64.543%"></td><td style="width:0.1%"></td><td style="width:1.0%"></td><td style="width:15.712%"></td><td style="width:0.1%"></td><td style="width:0.1%"></td><td style="width:0.530%"></td><td style="width:0.1%"></td><td style="width:1.0%"></td><td style="width:15.715%"></td><td style="width:0.1%"></td></tr><tr><td colspan="3" style="padding:0 1pt"></td><td colspan="3" style="padding:1.5pt 1pt;text-align:center;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:700;line-height:100%">September 30,<br/>2026</span></td><td colspan="3" style="padding:0 1pt"></td><td colspan="3" style="padding:1.5pt 1pt;text-align:center;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:700;line-height:100%">December 31,<br/>2025</span></td></tr><tr><td colspan="3" style="background-color:#cceeff;padding:1.5pt 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%">Preliminary surveys and investigations</span></td><td style="background-color:#cceeff;border-top:1pt solid #000000;padding:1.5pt 0 1.5pt 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%">$</span></td><td style="background-color:#cceeff;border-top:1pt solid #000000;padding:1.5pt 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%">12,527 </span></td><td style="background-color:#cceeff;border-top:1pt solid #000000;padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"></td><td colspan="3" style="background-color:#cceeff;padding:0 1pt"></td><td style="background-color:#cceeff;border-top:1pt solid #000000;padding:1.5pt 0 1.5pt 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%">$</span></td><td style="background-color:#cceeff;border-top:1pt solid #000000;padding:1.5pt 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%">12,988 </span></td><td style="background-color:#cceeff;border-top:1pt solid #000000;padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"></td></tr><tr><td colspan="3" style="background-color:#ffffff;padding:1.5pt 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%">Advances to operating agents of jointly owned facilities</span></td><td colspan="2" style="background-color:#ffffff;padding:1.5pt 0 1.5pt 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%">10,919 </span></td><td style="background-color:#ffffff;padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"></td><td colspan="3" style="background-color:#ffffff;padding:0 1pt"></td><td colspan="2" style="background-color:#ffffff;padding:1.5pt 0 1.5pt 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%">11,210 </span></td><td style="background-color:#ffffff;padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"></td></tr><tr><td colspan="3" style="background-color:#cceeff;padding:1.5pt 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%">Lease right-of-use assets</span></td><td colspan="2" style="background-color:#cceeff;padding:1.5pt 0 1.5pt 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%">10,405 </span></td><td style="background-color:#cceeff;padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"></td><td colspan="3" style="background-color:#cceeff;padding:0 1pt"></td><td colspan="2" style="background-color:#cceeff;padding:1.5pt 0 1.5pt 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%">10,955 </span></td><td style="background-color:#cceeff;padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"></td></tr><tr><td colspan="3" style="background-color:#ffffff;padding:1.5pt 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%">Financial asset - reclamation</span></td><td colspan="2" style="background-color:#ffffff;padding:1.5pt 0 1.5pt 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">17,638 </span></td><td style="background-color:#ffffff;padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"></td><td colspan="3" style="background-color:#ffffff;padding:0 1pt"></td><td colspan="2" style="background-color:#ffffff;padding:1.5pt 0 1.5pt 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">17,027 </span></td><td style="background-color:#ffffff;padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"></td></tr><tr><td colspan="3" style="background-color:#cceeff;padding:1.5pt 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%">Other</span></td><td colspan="2" style="background-color:#cceeff;padding:1.5pt 0 1.5pt 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%">3,680 </span></td><td style="background-color:#cceeff;padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"></td><td colspan="3" style="background-color:#cceeff;padding:0 1pt"></td><td colspan="2" style="background-color:#cceeff;padding:1.5pt 0 1.5pt 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%">6,366 </span></td><td style="background-color:#cceeff;padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"></td></tr><tr><td colspan="3" style="background-color:#ffffff;padding:1.5pt 1pt 1.5pt 7.75pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:700;line-height:120%">Total other deferred charges</span></td><td style="background-color:#ffffff;border-bottom:3pt double #000000;border-top:1pt solid #000;padding:1.5pt 0 1.5pt 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:700;line-height:120%">$</span></td><td style="background-color:#ffffff;border-bottom:3pt double #000000;border-top:1pt solid #000;padding:1.5pt 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:700;line-height:120%">55,169</span><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%"> </span></td><td style="background-color:#ffffff;border-bottom:3pt double #000000;border-top:1pt solid #000;padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"></td><td colspan="3" style="background-color:#ffffff;padding:0 1pt"></td><td style="background-color:#ffffff;border-bottom:3pt double #000000;border-top:1pt solid #000;padding:1.5pt 0 1.5pt 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:700;line-height:120%">$</span></td><td style="background-color:#ffffff;border-bottom:3pt double #000000;border-top:1pt solid #000;padding:1.5pt 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:700;line-height:120%">58,546</span><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%"> </span></td><td style="background-color:#ffffff;border-bottom:3pt double #000000;border-top:1pt solid #000;padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"></td></tr></table></div> 12527000 12988000 10919000 11210000 10405000 10955000 17638000 17027000 3680000 6366000 55169000 58546000 LONG-TERM DEBT<div style="margin-top:10pt;text-indent:36pt"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%">As of September 30, 2026, Tri-State had $2.9 billion of long-term debt which consists of mortgage notes payable, pollution control revenue bonds and the Springerville certificates. The mortgage notes payable and pollution control revenue bonds are secured on a parity basis by a Master First Mortgage Indenture, Deed of Trust and Security Agreement (“Master Indenture”). Substantially all of Tri-State's assets, rents, revenues and margins are pledged as collateral. The Springerville certificates are secured by the assets of Springerville Unit 3. All long-term debt contains certain restrictive financial covenants, including a DSR requirement on an annual basis and an ECR requirement of at least 18 percent at the end of each fiscal year. Other than long-term debt for the Springerville certificates that has a DSR requirement of at least 1.02 on an annual basis, all other long-term debt contains a DSR requirement of at least 1.10 on an annual basis. A DSR below 1.025 under the Master Indenture would require Tri-State to transfer all cash to a special fund managed by the trustee of the Master Indenture.</span></div><div style="margin-top:10pt;text-indent:36pt"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%">Tri-State has a secured revolving credit facility with National Rural Utilities Cooperative Finance Corporation (“CFC”), as lead arranger and administrative agent, in the amount of $650 million ("2026 Credit Agreement") that expires on April 21, 2031, unless extended as provided therein, and includes swingline loan and letter of credit sublimits of $150 million each. As of September 30, 2026, Tri-State had $463 million in availability (including $145 million under the letter of credit sublimit) under the 2026 Credit Agreement.</span></div><div style="margin-top:10pt;text-indent:36pt"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%">Tri-State has a secured renewable revolving credit facility with CoBank, as lead arranger, and CFC, as administrative agent, in the amount of $250 million ("Renewable Revolving Credit Agreement") that expires on June 18, 2030. As of September 30, 2026, Tri-State had borrowed $189 million in adjusted Term SOFR rate loans and $61 million of availability remained. </span></div><div style="margin-top:10pt;text-indent:36pt"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%">Long-term debt consists of the following (dollars in thousands):</span></div><div style="margin-top:5pt"><table style="border-collapse:collapse;display:inline-table;margin-bottom:5pt;vertical-align:text-bottom;width:100.000%"><tr><td style="width:1.0%"></td><td style="width:64.543%"></td><td style="width:0.1%"></td><td style="width:1.0%"></td><td style="width:15.712%"></td><td style="width:0.1%"></td><td style="width:0.1%"></td><td style="width:0.530%"></td><td style="width:0.1%"></td><td style="width:1.0%"></td><td style="width:15.715%"></td><td style="width:0.1%"></td></tr><tr><td colspan="3" style="padding:0 1pt"></td><td colspan="3" style="padding:1.5pt 1pt;text-align:center;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:700;line-height:100%">September 30,<br/>2026</span></td><td colspan="3" style="padding:0 1pt"></td><td colspan="3" style="padding:1.5pt 1pt;text-align:center;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:700;line-height:100%">December 31,<br/>2025</span></td></tr><tr><td colspan="3" style="background-color:#cceeff;padding:1.5pt 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%">Total debt</span></td><td style="background-color:#cceeff;border-top:1pt solid #000000;padding:1.5pt 0 1.5pt 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%">$</span></td><td style="background-color:#cceeff;border-top:1pt solid #000000;padding:1.5pt 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%">2,937,156 </span></td><td style="background-color:#cceeff;border-top:1pt solid #000000;padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"></td><td colspan="3" style="background-color:#cceeff;padding:0 1pt"></td><td style="background-color:#cceeff;border-top:1pt solid #000000;padding:1.5pt 0 1.5pt 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%">$</span></td><td style="background-color:#cceeff;border-top:1pt solid #000000;padding:1.5pt 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%">3,188,697 </span></td><td style="background-color:#cceeff;border-top:1pt solid #000000;padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"></td></tr><tr><td colspan="3" style="padding:1.5pt 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%">Less debt issuance costs</span></td><td colspan="2" style="padding:1.5pt 0 1.5pt 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%">(16,036)</span></td><td style="padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"></td><td colspan="3" style="padding:0 1pt"></td><td colspan="2" style="padding:1.5pt 0 1.5pt 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%">(16,591)</span></td><td style="padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"></td></tr><tr><td colspan="3" style="background-color:#cceeff;padding:1.5pt 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%">Less debt discounts</span></td><td colspan="2" style="background-color:#cceeff;padding:1.5pt 0 1.5pt 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%">(7,827)</span></td><td style="background-color:#cceeff;padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"></td><td colspan="3" style="background-color:#cceeff;padding:0 1pt"></td><td colspan="2" style="background-color:#cceeff;padding:1.5pt 0 1.5pt 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%">(8,071)</span></td><td style="background-color:#cceeff;padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"></td></tr><tr><td colspan="3" style="padding:1.5pt 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%">Plus debt premiums</span></td><td colspan="2" style="padding:1.5pt 0 1.5pt 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%">8,560 </span></td><td style="padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"></td><td colspan="3" style="padding:0 1pt"></td><td colspan="2" style="padding:1.5pt 0 1.5pt 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%">9,232 </span></td><td style="padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"></td></tr><tr><td colspan="3" style="background-color:#cceeff;padding:1.5pt 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:700;line-height:120%">Total debt adjusted for debt issuance costs, discounts and premiums</span></td><td colspan="2" style="background-color:#cceeff;border-top:1pt solid #000000;padding:1.5pt 0 1.5pt 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:700;line-height:120%">2,921,853</span><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%"> </span></td><td style="background-color:#cceeff;border-top:1pt solid #000000;padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"></td><td colspan="3" style="background-color:#cceeff;padding:0 1pt"></td><td colspan="2" style="background-color:#cceeff;border-top:1pt solid #000000;padding:1.5pt 0 1.5pt 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:700;line-height:120%">3,173,268</span><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%"> </span></td><td style="background-color:#cceeff;border-top:1pt solid #000000;padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"></td></tr><tr><td colspan="3" style="padding:1.5pt 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%">Less current maturities</span></td><td colspan="2" style="padding:1.5pt 0 1.5pt 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%">(61,879)</span></td><td style="padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"></td><td colspan="3" style="padding:0 1pt"></td><td colspan="2" style="padding:1.5pt 0 1.5pt 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%">(80,052)</span></td><td style="padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"></td></tr><tr><td colspan="3" style="background-color:#cceeff;padding:1.5pt 1pt 1.5pt 12.25pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:700;line-height:120%">Long-term debt</span></td><td style="background-color:#cceeff;border-bottom:3pt double #000000;border-top:1pt solid #000000;padding:1.5pt 0 1.5pt 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:700;line-height:120%">$</span></td><td style="background-color:#cceeff;border-bottom:3pt double #000000;border-top:1pt solid #000000;padding:1.5pt 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:700;line-height:120%">2,859,974</span><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%"> </span></td><td style="background-color:#cceeff;border-bottom:3pt double #000000;border-top:1pt solid #000000;padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"></td><td colspan="3" style="background-color:#cceeff;padding:0 1pt"></td><td style="background-color:#cceeff;border-bottom:3pt double #000000;border-top:1pt solid #000000;padding:1.5pt 0 1.5pt 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:700;line-height:120%">$</span></td><td style="background-color:#cceeff;border-bottom:3pt double #000000;border-top:1pt solid #000000;padding:1.5pt 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:700;line-height:120%">3,093,216</span><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%"> </span></td><td style="background-color:#cceeff;border-bottom:3pt double #000000;border-top:1pt solid #000000;padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"></td></tr></table></div> 2900000000 0.18 1.02 1.10 1.025 650000000 150000000 150000000 463000000 145000000 250000000 189000000 61000000 <div style="margin-top:10pt;text-indent:36pt"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%">Long-term debt consists of the following (dollars in thousands):</span></div><div style="margin-top:5pt"><table style="border-collapse:collapse;display:inline-table;margin-bottom:5pt;vertical-align:text-bottom;width:100.000%"><tr><td style="width:1.0%"></td><td style="width:64.543%"></td><td style="width:0.1%"></td><td style="width:1.0%"></td><td style="width:15.712%"></td><td style="width:0.1%"></td><td style="width:0.1%"></td><td style="width:0.530%"></td><td style="width:0.1%"></td><td style="width:1.0%"></td><td style="width:15.715%"></td><td style="width:0.1%"></td></tr><tr><td colspan="3" style="padding:0 1pt"></td><td colspan="3" style="padding:1.5pt 1pt;text-align:center;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:700;line-height:100%">September 30,<br/>2026</span></td><td colspan="3" style="padding:0 1pt"></td><td colspan="3" style="padding:1.5pt 1pt;text-align:center;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:700;line-height:100%">December 31,<br/>2025</span></td></tr><tr><td colspan="3" style="background-color:#cceeff;padding:1.5pt 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%">Total debt</span></td><td style="background-color:#cceeff;border-top:1pt solid #000000;padding:1.5pt 0 1.5pt 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%">$</span></td><td style="background-color:#cceeff;border-top:1pt solid #000000;padding:1.5pt 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%">2,937,156 </span></td><td style="background-color:#cceeff;border-top:1pt solid #000000;padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"></td><td colspan="3" style="background-color:#cceeff;padding:0 1pt"></td><td style="background-color:#cceeff;border-top:1pt solid #000000;padding:1.5pt 0 1.5pt 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%">$</span></td><td style="background-color:#cceeff;border-top:1pt solid #000000;padding:1.5pt 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%">3,188,697 </span></td><td style="background-color:#cceeff;border-top:1pt solid #000000;padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"></td></tr><tr><td colspan="3" style="padding:1.5pt 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%">Less debt issuance costs</span></td><td colspan="2" style="padding:1.5pt 0 1.5pt 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%">(16,036)</span></td><td style="padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"></td><td colspan="3" style="padding:0 1pt"></td><td colspan="2" style="padding:1.5pt 0 1.5pt 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%">(16,591)</span></td><td style="padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"></td></tr><tr><td colspan="3" style="background-color:#cceeff;padding:1.5pt 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%">Less debt discounts</span></td><td colspan="2" style="background-color:#cceeff;padding:1.5pt 0 1.5pt 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%">(7,827)</span></td><td style="background-color:#cceeff;padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"></td><td colspan="3" style="background-color:#cceeff;padding:0 1pt"></td><td colspan="2" style="background-color:#cceeff;padding:1.5pt 0 1.5pt 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%">(8,071)</span></td><td style="background-color:#cceeff;padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"></td></tr><tr><td colspan="3" style="padding:1.5pt 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%">Plus debt premiums</span></td><td colspan="2" style="padding:1.5pt 0 1.5pt 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%">8,560 </span></td><td style="padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"></td><td colspan="3" style="padding:0 1pt"></td><td colspan="2" style="padding:1.5pt 0 1.5pt 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%">9,232 </span></td><td style="padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"></td></tr><tr><td colspan="3" style="background-color:#cceeff;padding:1.5pt 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:700;line-height:120%">Total debt adjusted for debt issuance costs, discounts and premiums</span></td><td colspan="2" style="background-color:#cceeff;border-top:1pt solid #000000;padding:1.5pt 0 1.5pt 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:700;line-height:120%">2,921,853</span><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%"> </span></td><td style="background-color:#cceeff;border-top:1pt solid #000000;padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"></td><td colspan="3" style="background-color:#cceeff;padding:0 1pt"></td><td colspan="2" style="background-color:#cceeff;border-top:1pt solid #000000;padding:1.5pt 0 1.5pt 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:700;line-height:120%">3,173,268</span><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%"> </span></td><td style="background-color:#cceeff;border-top:1pt solid #000000;padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"></td></tr><tr><td colspan="3" style="padding:1.5pt 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%">Less current maturities</span></td><td colspan="2" style="padding:1.5pt 0 1.5pt 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%">(61,879)</span></td><td style="padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"></td><td colspan="3" style="padding:0 1pt"></td><td colspan="2" style="padding:1.5pt 0 1.5pt 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%">(80,052)</span></td><td style="padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"></td></tr><tr><td colspan="3" style="background-color:#cceeff;padding:1.5pt 1pt 1.5pt 12.25pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:700;line-height:120%">Long-term debt</span></td><td style="background-color:#cceeff;border-bottom:3pt double #000000;border-top:1pt solid #000000;padding:1.5pt 0 1.5pt 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:700;line-height:120%">$</span></td><td style="background-color:#cceeff;border-bottom:3pt double #000000;border-top:1pt solid #000000;padding:1.5pt 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:700;line-height:120%">2,859,974</span><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%"> </span></td><td style="background-color:#cceeff;border-bottom:3pt double #000000;border-top:1pt solid #000000;padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"></td><td colspan="3" style="background-color:#cceeff;padding:0 1pt"></td><td style="background-color:#cceeff;border-bottom:3pt double #000000;border-top:1pt solid #000000;padding:1.5pt 0 1.5pt 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:700;line-height:120%">$</span></td><td style="background-color:#cceeff;border-bottom:3pt double #000000;border-top:1pt solid #000000;padding:1.5pt 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:700;line-height:120%">3,093,216</span><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%"> </span></td><td style="background-color:#cceeff;border-bottom:3pt double #000000;border-top:1pt solid #000000;padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"></td></tr></table></div> 2937156000 3188697000 16036000 16591000 7827000 8071000 8560000 9232000 2921853000 3173268000 61879000 80052000 2859974000 3093216000 SHORT-TERM BORROWINGS<div style="margin-top:10pt;text-indent:36pt"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%">Tri-State has a commercial paper program under which it issues unsecured commercial paper. As of September 30, 2026, the commercial paper aggregate amounts outstanding shall not exceed the lesser of $600 million or the amount available under the 2026 Credit Agreement. The commercial paper issuances are used to provide an additional financing source for short-term liquidity needs. The maturities of the commercial paper issuances vary but may not exceed 397 days from the date of issue. The commercial paper notes are classified as current and are included in current liabilities as short-term borrowings on the consolidated statements of financial position.</span></div><div style="margin-top:10pt;text-indent:36pt"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%">Short-term borrowings consisted of the following (dollars in thousands):</span></div><div style="margin-top:5pt"><table style="border-collapse:collapse;display:inline-table;margin-bottom:5pt;vertical-align:text-bottom;width:100.000%"><tr><td style="width:1.0%"></td><td style="width:64.543%"></td><td style="width:0.1%"></td><td style="width:1.0%"></td><td style="width:15.712%"></td><td style="width:0.1%"></td><td style="width:0.1%"></td><td style="width:0.530%"></td><td style="width:0.1%"></td><td style="width:1.0%"></td><td style="width:15.715%"></td><td style="width:0.1%"></td></tr><tr><td colspan="3" style="padding:0 1pt"></td><td colspan="3" style="padding:1.5pt 1pt;text-align:center;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:700;line-height:100%">September 30,<br/>2026</span></td><td colspan="3" style="padding:0 1pt"></td><td colspan="3" style="padding:1.5pt 1pt;text-align:center;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:700;line-height:100%">December 31,<br/>2025</span></td></tr><tr><td colspan="3" style="background-color:#cceeff;padding:1.5pt 1pt 1.5pt 7.75pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%">Commercial paper outstanding, net of discounts</span></td><td style="background-color:#cceeff;border-top:1pt solid #000000;padding:1.5pt 0 1.5pt 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%">$</span></td><td style="background-color:#cceeff;border-top:1pt solid #000000;padding:1.5pt 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%">181,762 </span></td><td style="background-color:#cceeff;border-top:1pt solid #000000;padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"></td><td colspan="3" style="background-color:#cceeff;padding:0 1pt"></td><td style="background-color:#cceeff;border-top:1pt solid #000000;padding:1.5pt 0 1.5pt 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">$</span></td><td style="background-color:#cceeff;border-top:1pt solid #000000;padding:1.5pt 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">— </span></td><td style="background-color:#cceeff;border-top:1pt solid #000000;padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"></td></tr><tr><td colspan="3" style="background-color:#ffffff;padding:1.5pt 1pt 1.5pt 7.75pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%">Short-term borrowings - other</span></td><td style="background-color:#ffffff;padding:1.5pt 0 1.5pt 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%">$</span></td><td style="background-color:#ffffff;padding:1.5pt 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%">100 </span></td><td style="background-color:#ffffff;padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"></td><td colspan="3" style="background-color:#ffffff;padding:0 1pt"></td><td style="background-color:#ffffff;padding:1.5pt 0 1.5pt 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%">$</span></td><td style="background-color:#ffffff;padding:1.5pt 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%">100 </span></td><td style="background-color:#ffffff;padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"></td></tr><tr><td colspan="3" style="background-color:#cceeff;padding:1.5pt 1pt 1.5pt 7.75pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%">Weighted average interest rate</span></td><td colspan="2" style="background-color:#cceeff;padding:1.5pt 0 1.5pt 1pt;text-align:right;vertical-align:bottom"><span style="background-color:#cceeff;color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">4.24 </span></td><td style="background-color:#cceeff;padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"><span style="background-color:#cceeff;color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">%</span></td><td colspan="3" style="background-color:#cceeff;padding:0 1pt"></td><td colspan="2" style="background-color:#cceeff;padding:1.5pt 0 1.5pt 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">— </span></td><td style="background-color:#cceeff;padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">%</span></td></tr></table></div><div style="text-indent:36pt"><span><br/></span></div><div style="text-indent:36pt"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:112%">As of September 30, 2026, $418 million of the $600 million commercial paper program limit set by Tri-State's current commercial paper program remained available.</span></div> 600000000 P397D <div style="margin-top:10pt;text-indent:36pt"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%">Short-term borrowings consisted of the following (dollars in thousands):</span></div><div style="margin-top:5pt"><table style="border-collapse:collapse;display:inline-table;margin-bottom:5pt;vertical-align:text-bottom;width:100.000%"><tr><td style="width:1.0%"></td><td style="width:64.543%"></td><td style="width:0.1%"></td><td style="width:1.0%"></td><td style="width:15.712%"></td><td style="width:0.1%"></td><td style="width:0.1%"></td><td style="width:0.530%"></td><td style="width:0.1%"></td><td style="width:1.0%"></td><td style="width:15.715%"></td><td style="width:0.1%"></td></tr><tr><td colspan="3" style="padding:0 1pt"></td><td colspan="3" style="padding:1.5pt 1pt;text-align:center;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:700;line-height:100%">September 30,<br/>2026</span></td><td colspan="3" style="padding:0 1pt"></td><td colspan="3" style="padding:1.5pt 1pt;text-align:center;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:700;line-height:100%">December 31,<br/>2025</span></td></tr><tr><td colspan="3" style="background-color:#cceeff;padding:1.5pt 1pt 1.5pt 7.75pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%">Commercial paper outstanding, net of discounts</span></td><td style="background-color:#cceeff;border-top:1pt solid #000000;padding:1.5pt 0 1.5pt 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%">$</span></td><td style="background-color:#cceeff;border-top:1pt solid #000000;padding:1.5pt 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%">181,762 </span></td><td style="background-color:#cceeff;border-top:1pt solid #000000;padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"></td><td colspan="3" style="background-color:#cceeff;padding:0 1pt"></td><td style="background-color:#cceeff;border-top:1pt solid #000000;padding:1.5pt 0 1.5pt 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">$</span></td><td style="background-color:#cceeff;border-top:1pt solid #000000;padding:1.5pt 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">— </span></td><td style="background-color:#cceeff;border-top:1pt solid #000000;padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"></td></tr><tr><td colspan="3" style="background-color:#ffffff;padding:1.5pt 1pt 1.5pt 7.75pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%">Short-term borrowings - other</span></td><td style="background-color:#ffffff;padding:1.5pt 0 1.5pt 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%">$</span></td><td style="background-color:#ffffff;padding:1.5pt 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%">100 </span></td><td style="background-color:#ffffff;padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"></td><td colspan="3" style="background-color:#ffffff;padding:0 1pt"></td><td style="background-color:#ffffff;padding:1.5pt 0 1.5pt 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%">$</span></td><td style="background-color:#ffffff;padding:1.5pt 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%">100 </span></td><td style="background-color:#ffffff;padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"></td></tr><tr><td colspan="3" style="background-color:#cceeff;padding:1.5pt 1pt 1.5pt 7.75pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%">Weighted average interest rate</span></td><td colspan="2" style="background-color:#cceeff;padding:1.5pt 0 1.5pt 1pt;text-align:right;vertical-align:bottom"><span style="background-color:#cceeff;color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">4.24 </span></td><td style="background-color:#cceeff;padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"><span style="background-color:#cceeff;color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">%</span></td><td colspan="3" style="background-color:#cceeff;padding:0 1pt"></td><td colspan="2" style="background-color:#cceeff;padding:1.5pt 0 1.5pt 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">— </span></td><td style="background-color:#cceeff;padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">%</span></td></tr></table></div> 181762000 0 100000 100000 0.0424 0 418000000 600000000 ASSET RETIREMENT AND ENVIRONMENTAL REMEDIATION OBLIGATIONS<div style="margin-top:10pt;text-indent:36pt"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%">Tri-State accounts for current obligations associated with the future retirement of tangible long-lived assets and environmental remediation in accordance with the accounting guidance relating to asset retirement and environmental obligations. This guidance requires that legal obligations associated with the retirement of long-lived assets be recognized at fair value at the time the liability is incurred and capitalized as part of the related long-lived asset. Over time, the liability is adjusted to its present value by recognizing accretion expense and the capitalized cost of the long-lived asset is depreciated in a manner consistent with the depreciation of the underlying physical asset. In the absence of quoted market prices, Tri-State determines fair value by using present value techniques in which estimates of future cash flows associated with retirement activities are discounted using a credit adjusted risk-free rate and market risk premium. Upon settlement of an asset retirement obligation, Tri-State will apply payment against the estimated liability and incur a gain or loss if the actual retirement costs differ from the estimated recorded liability.</span></div><div style="margin-top:10pt;text-indent:36pt"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%">Environmental remediation costs are accrued based on management’s best estimate at the end of each period of the costs expected to be incurred. Such cost estimates may include ongoing care, maintenance and monitoring costs. Changes in reclamation estimates are reflected in earnings in the period an estimate is revised. </span></div><div style="margin-top:10pt;text-indent:36pt"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%">Coal mines: Tri-State has asset retirement obligations for the final reclamation costs and environmental obligations for post-reclamation monitoring related to the Colowyo Mine and the New Horizon Mine. The New Horizon Mine is currently in post-reclamation monitoring. The Colowyo Mine is in final reclamation.</span></div><div style="margin-top:10pt;text-indent:36pt"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%">Generation: Tri-State has asset retirement obligations related to equipment, dams, ponds, wells and underground storage tanks at its generating stations.</span></div><div style="margin-top:10pt;text-indent:36pt"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%">Aggregate carrying amounts of asset retirement obligations and environmental remediation obligations are as follows (dollars in thousands):</span></div><div style="margin-top:5pt"><table style="border-collapse:collapse;display:inline-table;margin-bottom:5pt;vertical-align:text-bottom;width:100.000%"><tr><td style="width:1.0%"></td><td style="width:79.455%"></td><td style="width:0.1%"></td><td style="width:1.0%"></td><td style="width:18.345%"></td><td style="width:0.1%"></td></tr><tr><td colspan="3" style="padding:0 1pt"></td><td colspan="3" style="padding:1.5pt 1pt;text-align:center;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:700;line-height:100%">Nine Months Ended September 30, 2026</span></td></tr><tr><td colspan="3" style="background-color:#cceeff;padding:1.5pt 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">Obligations at beginning of period</span></td><td style="background-color:#cceeff;border-top:1pt solid #000000;padding:1.5pt 0 1.5pt 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">$</span></td><td style="background-color:#cceeff;border-top:1pt solid #000000;padding:1.5pt 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">336,768 </span></td><td style="background-color:#cceeff;border-top:1pt solid #000000;padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"></td></tr><tr><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td></tr><tr><td colspan="3" style="background-color:#ffffff;padding:1.5pt 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">Liabilities settled</span></td><td colspan="2" style="background-color:#ffffff;padding:1.5pt 0 1.5pt 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">(41,384)</span></td><td style="background-color:#ffffff;padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"></td></tr><tr><td colspan="3" style="background-color:#cceeff;padding:1.5pt 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">Accretion expense</span></td><td colspan="2" style="background-color:#cceeff;padding:1.5pt 0 1.5pt 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">2,839 </span></td><td style="background-color:#cceeff;padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"></td></tr><tr><td colspan="3" style="background-color:#ffffff;padding:1.5pt 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">Change in estimate</span></td><td colspan="2" style="background-color:#ffffff;padding:1.5pt 0 1.5pt 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">(10,401)</span></td><td style="background-color:#ffffff;padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"></td></tr><tr><td colspan="3" style="background-color:#cceeff;padding:1.5pt 1pt 1.5pt 12.25pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:700;line-height:100%">Total obligations at end of period</span></td><td style="background-color:#cceeff;border-top:1pt solid #000;padding:1.5pt 0 1.5pt 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:700;line-height:100%">$</span></td><td style="background-color:#cceeff;border-top:1pt solid #000;padding:1.5pt 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:700;line-height:100%">287,821</span><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%"> </span></td><td style="background-color:#cceeff;border-top:1pt solid #000;padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"></td></tr><tr><td colspan="3" style="background-color:#ffffff;padding:1.5pt 1pt 1.5pt 12.25pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">Less current obligations at end of period</span></td><td colspan="2" style="background-color:#ffffff;padding:1.5pt 0 1.5pt 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">(119,979)</span></td><td style="background-color:#ffffff;padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"></td></tr><tr><td colspan="3" style="background-color:#cceeff;padding:1.5pt 1pt 1.5pt 25.75pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:700;line-height:100%">Long-term obligations at end of period</span></td><td style="background-color:#cceeff;border-bottom:3pt double #000000;border-top:1pt solid #000000;padding:1.5pt 0 1.5pt 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:700;line-height:100%">$</span></td><td style="background-color:#cceeff;border-bottom:3pt double #000000;border-top:1pt solid #000000;padding:1.5pt 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:700;line-height:100%">167,842</span><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%"> </span></td><td style="background-color:#cceeff;border-bottom:3pt double #000000;border-top:1pt solid #000000;padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"></td></tr></table></div><div style="margin-top:10pt;text-indent:36pt"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%">The New Horizon Mine environmental remediation liability balance is $62.5 million as of September 30, 2026. Of this amount, $24.7 million is recorded on a discounted basis, using a discount rate of 6.73 percent, with total estimated undiscounted future cash outflows of $36.6 million. Environmental obligation expense is included in other operating expenses on Tri-State's consolidated statements of operations. </span></div><div style="margin-top:10pt;text-indent:36pt"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%">Tri-State also has asset retirement obligations with indeterminate settlement dates. These are made up primarily of obligations attached to transmission and other easements that are considered by Tri-State to be operated in perpetuity and therefore the measurement of the obligation is not possible. A liability will be recognized in the period in which sufficient information exists to estimate a range of potential settlement dates as is needed to employ a present value technique to estimate fair value. </span></div><div style="margin-top:10pt;text-indent:36pt"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%">In May 2024, the Environmental Protection Agency ("EPA") published a final rule regarding groundwater monitoring, corrective action, closure, and post-closure care requirements for all coal combustion residuals management units under the Resource Conservation and Recovery Act. Tri-State is progressing through the initial implementation phases for coal combustion residuals management units. Depending on the applicable results, changes to the applicable asset retirement obligations may be required. In February 2026, the EPA published an extension rule and in April 2026 the EPA published draft amendments applicable to coal combustion residual management units. Tri-State is evaluating to determine if there are any material impacts to its facilities. Depending on the final amendment language, changes to the applicable asset retirement obligations may be required. As of September 30, 2026, no changes to recorded asset retirement or environmental remediation obligations have been recognized.</span></div> <div style="margin-top:10pt;text-indent:36pt"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%">Aggregate carrying amounts of asset retirement obligations and environmental remediation obligations are as follows (dollars in thousands):</span></div><div style="margin-top:5pt"><table style="border-collapse:collapse;display:inline-table;margin-bottom:5pt;vertical-align:text-bottom;width:100.000%"><tr><td style="width:1.0%"></td><td style="width:79.455%"></td><td style="width:0.1%"></td><td style="width:1.0%"></td><td style="width:18.345%"></td><td style="width:0.1%"></td></tr><tr><td colspan="3" style="padding:0 1pt"></td><td colspan="3" style="padding:1.5pt 1pt;text-align:center;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:700;line-height:100%">Nine Months Ended September 30, 2026</span></td></tr><tr><td colspan="3" style="background-color:#cceeff;padding:1.5pt 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">Obligations at beginning of period</span></td><td style="background-color:#cceeff;border-top:1pt solid #000000;padding:1.5pt 0 1.5pt 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">$</span></td><td style="background-color:#cceeff;border-top:1pt solid #000000;padding:1.5pt 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">336,768 </span></td><td style="background-color:#cceeff;border-top:1pt solid #000000;padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"></td></tr><tr><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td></tr><tr><td colspan="3" style="background-color:#ffffff;padding:1.5pt 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">Liabilities settled</span></td><td colspan="2" style="background-color:#ffffff;padding:1.5pt 0 1.5pt 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">(41,384)</span></td><td style="background-color:#ffffff;padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"></td></tr><tr><td colspan="3" style="background-color:#cceeff;padding:1.5pt 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">Accretion expense</span></td><td colspan="2" style="background-color:#cceeff;padding:1.5pt 0 1.5pt 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">2,839 </span></td><td style="background-color:#cceeff;padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"></td></tr><tr><td colspan="3" style="background-color:#ffffff;padding:1.5pt 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">Change in estimate</span></td><td colspan="2" style="background-color:#ffffff;padding:1.5pt 0 1.5pt 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">(10,401)</span></td><td style="background-color:#ffffff;padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"></td></tr><tr><td colspan="3" style="background-color:#cceeff;padding:1.5pt 1pt 1.5pt 12.25pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:700;line-height:100%">Total obligations at end of period</span></td><td style="background-color:#cceeff;border-top:1pt solid #000;padding:1.5pt 0 1.5pt 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:700;line-height:100%">$</span></td><td style="background-color:#cceeff;border-top:1pt solid #000;padding:1.5pt 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:700;line-height:100%">287,821</span><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%"> </span></td><td style="background-color:#cceeff;border-top:1pt solid #000;padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"></td></tr><tr><td colspan="3" style="background-color:#ffffff;padding:1.5pt 1pt 1.5pt 12.25pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">Less current obligations at end of period</span></td><td colspan="2" style="background-color:#ffffff;padding:1.5pt 0 1.5pt 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">(119,979)</span></td><td style="background-color:#ffffff;padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"></td></tr><tr><td colspan="3" style="background-color:#cceeff;padding:1.5pt 1pt 1.5pt 25.75pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:700;line-height:100%">Long-term obligations at end of period</span></td><td style="background-color:#cceeff;border-bottom:3pt double #000000;border-top:1pt solid #000000;padding:1.5pt 0 1.5pt 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:700;line-height:100%">$</span></td><td style="background-color:#cceeff;border-bottom:3pt double #000000;border-top:1pt solid #000000;padding:1.5pt 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:700;line-height:100%">167,842</span><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%"> </span></td><td style="background-color:#cceeff;border-bottom:3pt double #000000;border-top:1pt solid #000000;padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"></td></tr></table></div> 336768000 -41384000 2839000 10401000 287821000 119979000 167842000 environmental remediation liability 62500000 24700000 0.0673 36600000 OTHER DEFERRED CREDITS AND OTHER LIABILITIES<div style="margin-top:10pt;text-indent:36pt"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%">The following other deferred credits and other liabilities are reflected on Tri-State's consolidated statements of financial position (dollars in thousands):</span></div><div style="margin-top:5pt"><table style="border-collapse:collapse;display:inline-table;margin-bottom:5pt;vertical-align:text-bottom;width:100.000%"><tr><td style="width:1.0%"></td><td style="width:64.543%"></td><td style="width:0.1%"></td><td style="width:1.0%"></td><td style="width:15.712%"></td><td style="width:0.1%"></td><td style="width:0.1%"></td><td style="width:0.530%"></td><td style="width:0.1%"></td><td style="width:1.0%"></td><td style="width:15.715%"></td><td style="width:0.1%"></td></tr><tr><td colspan="3" style="padding:0 1pt"></td><td colspan="3" style="padding:1.5pt 1pt;text-align:center;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:700;line-height:100%">September 30,<br/>2026</span></td><td colspan="3" style="padding:0 1pt"></td><td colspan="3" style="padding:1.5pt 1pt;text-align:center;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:700;line-height:100%">December 31,<br/>2025</span></td></tr><tr><td colspan="3" style="background-color:#cceeff;padding:1.5pt 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">Transmission easements</span></td><td style="background-color:#cceeff;border-top:1pt solid #000000;padding:1.5pt 0 1.5pt 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">$</span></td><td style="background-color:#cceeff;border-top:1pt solid #000000;padding:1.5pt 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">14,976 </span></td><td style="background-color:#cceeff;border-top:1pt solid #000000;padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"></td><td colspan="3" style="background-color:#cceeff;padding:0 1pt"></td><td style="background-color:#cceeff;border-top:1pt solid #000000;padding:1.5pt 0 1.5pt 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">$</span></td><td style="background-color:#cceeff;border-top:1pt solid #000000;padding:1.5pt 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">15,373 </span></td><td style="background-color:#cceeff;border-top:1pt solid #000000;padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"></td></tr><tr><td colspan="3" style="background-color:#ffffff;padding:1.5pt 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">OATT deposits</span></td><td colspan="2" style="background-color:#ffffff;padding:1.5pt 0 1.5pt 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">24,929 </span></td><td style="background-color:#ffffff;padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"></td><td colspan="3" style="background-color:#ffffff;padding:0 1pt"></td><td colspan="2" style="background-color:#ffffff;padding:1.5pt 0 1.5pt 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">32,129 </span></td><td style="background-color:#ffffff;padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"></td></tr><tr><td colspan="3" style="background-color:#cceeff;padding:1.5pt 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">Financial liabilities - reclamation</span></td><td colspan="2" style="background-color:#cceeff;padding:1.5pt 0 1.5pt 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">10,468 </span></td><td style="background-color:#cceeff;padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"></td><td colspan="3" style="background-color:#cceeff;padding:0 1pt"></td><td colspan="2" style="background-color:#cceeff;padding:1.5pt 0 1.5pt 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">10,837 </span></td><td style="background-color:#cceeff;padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"></td></tr><tr><td colspan="3" style="background-color:#ffffff;padding:1.5pt 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">Customer deposits</span></td><td colspan="2" style="background-color:#ffffff;padding:1.5pt 0 1.5pt 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">6,860 </span></td><td style="background-color:#ffffff;padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"></td><td colspan="3" style="background-color:#ffffff;padding:0 1pt"></td><td colspan="2" style="background-color:#ffffff;padding:1.5pt 0 1.5pt 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">16,517 </span></td><td style="background-color:#ffffff;padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"></td></tr><tr><td colspan="3" style="background-color:#cceeff;padding:1.5pt 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">Contract liabilities (unearned revenue) - noncurrent</span></td><td colspan="2" style="background-color:#cceeff;padding:1.5pt 0 1.5pt 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">2,807 </span></td><td style="background-color:#cceeff;padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"></td><td colspan="3" style="background-color:#cceeff;padding:0 1pt"></td><td colspan="2" style="background-color:#cceeff;padding:1.5pt 0 1.5pt 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">3,182 </span></td><td style="background-color:#cceeff;padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"></td></tr><tr><td colspan="3" style="background-color:#ffffff;padding:1.5pt 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">Lease liabilities - noncurrent</span></td><td colspan="2" style="background-color:#ffffff;padding:1.5pt 0 1.5pt 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">6,038 </span></td><td style="background-color:#ffffff;padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"></td><td colspan="3" style="background-color:#ffffff;padding:0 1pt"></td><td colspan="2" style="background-color:#ffffff;padding:1.5pt 0 1.5pt 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">6,473 </span></td><td style="background-color:#ffffff;padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"></td></tr><tr><td colspan="3" style="background-color:#cceeff;padding:1.5pt 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">Other</span></td><td colspan="2" style="background-color:#cceeff;padding:1.5pt 0 1.5pt 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">7,466 </span></td><td style="background-color:#cceeff;padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"></td><td colspan="3" style="background-color:#cceeff;padding:0 1pt"></td><td colspan="2" style="background-color:#cceeff;padding:1.5pt 0 1.5pt 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">7,369 </span></td><td style="background-color:#cceeff;padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"></td></tr><tr><td colspan="3" style="background-color:#ffffff;padding:1.5pt 1pt 1.5pt 12.25pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:700;line-height:100%">Total other deferred credits and other liabilities</span></td><td style="background-color:#ffffff;border-bottom:3pt double #000000;border-top:1pt solid #000000;padding:1.5pt 0 1.5pt 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:700;line-height:100%">$</span></td><td style="background-color:#ffffff;border-bottom:3pt double #000000;border-top:1pt solid #000000;padding:1.5pt 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:700;line-height:100%">73,544</span><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%"> </span></td><td style="background-color:#ffffff;border-bottom:3pt double #000000;border-top:1pt solid #000000;padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"></td><td colspan="3" style="background-color:#ffffff;padding:0 1pt"></td><td style="background-color:#ffffff;border-bottom:3pt double #000000;border-top:1pt solid #000000;padding:1.5pt 0 1.5pt 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:700;line-height:100%">$</span></td><td style="background-color:#ffffff;border-bottom:3pt double #000000;border-top:1pt solid #000000;padding:1.5pt 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:700;line-height:100%">91,880</span><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%"> </span></td><td style="background-color:#ffffff;border-bottom:3pt double #000000;border-top:1pt solid #000000;padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"></td></tr></table><span style="font-family:'Times New Roman',serif;font-size:10pt;font-weight:700;line-height:120%"></span></div><div style="margin-top:10pt;text-indent:36pt"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%">In 2015, Tri-State renewed transmission right-of-way easements on tribal nation lands where certain of its electric transmission lines are located. Tri-State will pay $21.0 million for these easements from 2027 through the individual easement terms ending between 2035 and 2047 (prior to the easement termination event described below). The present values for the remaining easement payments were $15.0 million as of September 30, 2026 and $15.4 million as of December 31, 2025, respectively, which are recorded as other deferred credits and other liabilities. In April 2025, Tri-State submitted a notice of its intent to early terminate a portion of one of its easements on tribal nation lands related to decommissioning of a segment of the </span></div><div style="margin-top:10pt"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%">transmission line located on that right-of-way. The timing of decommissioning work is subject to ongoing coordination with the tribe and Bureau of Indian Affairs.</span></div><div style="margin-top:10pt;text-indent:36pt"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%">OATT deposits represent refundable transmission customer deposits related to interconnection and transmission requests from third parties. An OATT deposit is refundable as provided in Tri-State's Open Access Transmission Tariff ("OATT").</span></div><div style="margin-top:10pt;text-indent:36pt"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%">Financial liabilities - reclamation represent financial obligations that Tri-State has for its share of reclamation costs at jointly owned facilities in which Tri-State has undivided interests.</span></div><div style="margin-top:10pt;text-indent:36pt"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%">A lease liability represents a lessee’s obligation to make lease payments over the lease term. The long-term portion of Tri-State's lease liabilities are included in other deferred credits and other liabilities and the current portion of Tri-State's lease liabilities are included in current liabilities. See Note 15 – Leases.</span></div><div style="margin-top:10pt;text-indent:36pt"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%">A contract liability represents an entity’s obligation to transfer goods or services to a customer for which the entity has received consideration from the customer. Tri-State has received deposits from others and these deposits are reflected in contract liabilities (unearned revenue) until recognized in other operating revenues over the life of the agreement. Tri-State has received deposits from various parties and those that may still be required to be returned are a liability and these are reflected in customer deposits.</span><span style="font-family:'Times New Roman',serif;font-size:10pt;font-weight:700;line-height:120%"></span></div> <div style="margin-top:10pt;text-indent:36pt"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%">The following other deferred credits and other liabilities are reflected on Tri-State's consolidated statements of financial position (dollars in thousands):</span></div><div style="margin-top:5pt"><table style="border-collapse:collapse;display:inline-table;margin-bottom:5pt;vertical-align:text-bottom;width:100.000%"><tr><td style="width:1.0%"></td><td style="width:64.543%"></td><td style="width:0.1%"></td><td style="width:1.0%"></td><td style="width:15.712%"></td><td style="width:0.1%"></td><td style="width:0.1%"></td><td style="width:0.530%"></td><td style="width:0.1%"></td><td style="width:1.0%"></td><td style="width:15.715%"></td><td style="width:0.1%"></td></tr><tr><td colspan="3" style="padding:0 1pt"></td><td colspan="3" style="padding:1.5pt 1pt;text-align:center;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:700;line-height:100%">September 30,<br/>2026</span></td><td colspan="3" style="padding:0 1pt"></td><td colspan="3" style="padding:1.5pt 1pt;text-align:center;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:700;line-height:100%">December 31,<br/>2025</span></td></tr><tr><td colspan="3" style="background-color:#cceeff;padding:1.5pt 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">Transmission easements</span></td><td style="background-color:#cceeff;border-top:1pt solid #000000;padding:1.5pt 0 1.5pt 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">$</span></td><td style="background-color:#cceeff;border-top:1pt solid #000000;padding:1.5pt 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">14,976 </span></td><td style="background-color:#cceeff;border-top:1pt solid #000000;padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"></td><td colspan="3" style="background-color:#cceeff;padding:0 1pt"></td><td style="background-color:#cceeff;border-top:1pt solid #000000;padding:1.5pt 0 1.5pt 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">$</span></td><td style="background-color:#cceeff;border-top:1pt solid #000000;padding:1.5pt 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">15,373 </span></td><td style="background-color:#cceeff;border-top:1pt solid #000000;padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"></td></tr><tr><td colspan="3" style="background-color:#ffffff;padding:1.5pt 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">OATT deposits</span></td><td colspan="2" style="background-color:#ffffff;padding:1.5pt 0 1.5pt 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">24,929 </span></td><td style="background-color:#ffffff;padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"></td><td colspan="3" style="background-color:#ffffff;padding:0 1pt"></td><td colspan="2" style="background-color:#ffffff;padding:1.5pt 0 1.5pt 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">32,129 </span></td><td style="background-color:#ffffff;padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"></td></tr><tr><td colspan="3" style="background-color:#cceeff;padding:1.5pt 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">Financial liabilities - reclamation</span></td><td colspan="2" style="background-color:#cceeff;padding:1.5pt 0 1.5pt 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">10,468 </span></td><td style="background-color:#cceeff;padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"></td><td colspan="3" style="background-color:#cceeff;padding:0 1pt"></td><td colspan="2" style="background-color:#cceeff;padding:1.5pt 0 1.5pt 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">10,837 </span></td><td style="background-color:#cceeff;padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"></td></tr><tr><td colspan="3" style="background-color:#ffffff;padding:1.5pt 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">Customer deposits</span></td><td colspan="2" style="background-color:#ffffff;padding:1.5pt 0 1.5pt 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">6,860 </span></td><td style="background-color:#ffffff;padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"></td><td colspan="3" style="background-color:#ffffff;padding:0 1pt"></td><td colspan="2" style="background-color:#ffffff;padding:1.5pt 0 1.5pt 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">16,517 </span></td><td style="background-color:#ffffff;padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"></td></tr><tr><td colspan="3" style="background-color:#cceeff;padding:1.5pt 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">Contract liabilities (unearned revenue) - noncurrent</span></td><td colspan="2" style="background-color:#cceeff;padding:1.5pt 0 1.5pt 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">2,807 </span></td><td style="background-color:#cceeff;padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"></td><td colspan="3" style="background-color:#cceeff;padding:0 1pt"></td><td colspan="2" style="background-color:#cceeff;padding:1.5pt 0 1.5pt 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">3,182 </span></td><td style="background-color:#cceeff;padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"></td></tr><tr><td colspan="3" style="background-color:#ffffff;padding:1.5pt 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">Lease liabilities - noncurrent</span></td><td colspan="2" style="background-color:#ffffff;padding:1.5pt 0 1.5pt 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">6,038 </span></td><td style="background-color:#ffffff;padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"></td><td colspan="3" style="background-color:#ffffff;padding:0 1pt"></td><td colspan="2" style="background-color:#ffffff;padding:1.5pt 0 1.5pt 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">6,473 </span></td><td style="background-color:#ffffff;padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"></td></tr><tr><td colspan="3" style="background-color:#cceeff;padding:1.5pt 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">Other</span></td><td colspan="2" style="background-color:#cceeff;padding:1.5pt 0 1.5pt 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">7,466 </span></td><td style="background-color:#cceeff;padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"></td><td colspan="3" style="background-color:#cceeff;padding:0 1pt"></td><td colspan="2" style="background-color:#cceeff;padding:1.5pt 0 1.5pt 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">7,369 </span></td><td style="background-color:#cceeff;padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"></td></tr><tr><td colspan="3" style="background-color:#ffffff;padding:1.5pt 1pt 1.5pt 12.25pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:700;line-height:100%">Total other deferred credits and other liabilities</span></td><td style="background-color:#ffffff;border-bottom:3pt double #000000;border-top:1pt solid #000000;padding:1.5pt 0 1.5pt 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:700;line-height:100%">$</span></td><td style="background-color:#ffffff;border-bottom:3pt double #000000;border-top:1pt solid #000000;padding:1.5pt 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:700;line-height:100%">73,544</span><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%"> </span></td><td style="background-color:#ffffff;border-bottom:3pt double #000000;border-top:1pt solid #000000;padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"></td><td colspan="3" style="background-color:#ffffff;padding:0 1pt"></td><td style="background-color:#ffffff;border-bottom:3pt double #000000;border-top:1pt solid #000000;padding:1.5pt 0 1.5pt 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:700;line-height:100%">$</span></td><td style="background-color:#ffffff;border-bottom:3pt double #000000;border-top:1pt solid #000000;padding:1.5pt 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:700;line-height:100%">91,880</span><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%"> </span></td><td style="background-color:#ffffff;border-bottom:3pt double #000000;border-top:1pt solid #000000;padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"></td></tr></table><span style="font-family:'Times New Roman',serif;font-size:10pt;font-weight:700;line-height:120%"></span></div> 14976000 15373000 24929000 32129000 10468000 10837000 6860000 16517000 2807000 3182000 6038000 6473000 7466000 7369000 73544000 91880000 21000000.0 15000000.0 15400000 EMPLOYEE BENEFIT PLANS<div style="margin-top:10pt;padding-left:18pt"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-style:italic;font-weight:400;line-height:120%">Postretirement Benefits Other Than Pensions</span></div><div style="margin-top:10pt;text-indent:36pt"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%">Tri-State sponsors three medical plans for all non-bargaining unit employees under the age of 65. Two of the plans provide postretirement medical benefits to full-time non-bargaining unit employees and retirees who receive benefits under those plans, who have attained age 55, and who elect to participate. All three of these non-bargaining unit medical plans offer post employment medical benefits to employees on long-term disability. The plans were unfunded as of September 30, 2026, are contributory (with retiree premium contributions equivalent to employee premiums, adjusted annually) and contain other cost-sharing features such as deductibles. As of June 30, 2021, the plans ceased to provide postretirement medical benefits for employees who retire after June 30, 2021.</span></div><div style="margin-top:10pt;text-indent:36pt"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%">The postretirement medical benefit and post employment medical benefit obligations are determined annually (during the fourth quarter) by an independent actuary. The postretirement medical benefit and post employment medical benefit obligations are included in accumulated postretirement benefit and post employment obligations on Tri-State's consolidated statements of financial position as follows (dollars in thousands):</span></div><div style="margin-top:5pt"><table style="border-collapse:collapse;display:inline-table;margin-bottom:5pt;vertical-align:text-bottom;width:100.000%"><tr><td style="width:1.0%"></td><td style="width:79.455%"></td><td style="width:0.1%"></td><td style="width:1.0%"></td><td style="width:18.345%"></td><td style="width:0.1%"></td></tr><tr><td colspan="3" style="padding:0 1pt"></td><td colspan="3" style="padding:1.5pt 1pt;text-align:center;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:700;line-height:100%">Nine Months Ended September 30, 2026</span></td></tr><tr><td colspan="3" style="background-color:#cceeff;padding:1.5pt 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">Postretirement medical benefit obligation at beginning of period</span></td><td style="background-color:#cceeff;border-top:1pt solid #000000;padding:1.5pt 0 1.5pt 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">$</span></td><td style="background-color:#cceeff;border-top:1pt solid #000000;padding:1.5pt 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">347 </span></td><td style="background-color:#cceeff;border-top:1pt solid #000000;padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"></td></tr><tr><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td></tr><tr><td colspan="3" style="background-color:#ffffff;padding:1.5pt 1pt 1.5pt 7pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">Interest cost</span></td><td colspan="2" style="background-color:#ffffff;padding:1.5pt 0 1.5pt 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">16 </span></td><td style="background-color:#ffffff;padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"></td></tr><tr><td colspan="3" style="background-color:#cceeff;padding:1.5pt 1pt 1.5pt 7pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">Benefit payments (net of contributions by participants)</span></td><td colspan="2" style="background-color:#cceeff;padding:1.5pt 0 1.5pt 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">(170)</span></td><td style="background-color:#cceeff;padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"></td></tr><tr><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td></tr><tr><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td></tr><tr><td colspan="3" style="background-color:#ffffff;padding:1.5pt 1pt 1.5pt 12.25pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:700;line-height:100%">Postretirement medical benefit obligation at end of period</span></td><td style="background-color:#ffffff;border-top:1pt solid #000;padding:1.5pt 0 1.5pt 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:700;line-height:100%">$</span></td><td style="background-color:#ffffff;border-top:1pt solid #000;padding:1.5pt 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:700;line-height:100%">193</span><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%"> </span></td><td style="background-color:#ffffff;border-top:1pt solid #000;padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"></td></tr><tr><td colspan="3" style="background-color:#cceeff;padding:1.5pt 1pt 1.5pt 12.25pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">Postemployment medical benefit obligation at end of period</span></td><td colspan="2" style="background-color:#cceeff;padding:1.5pt 0 1.5pt 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">99 </span></td><td style="background-color:#cceeff;padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"></td></tr><tr><td colspan="3" style="background-color:#ffffff;padding:1.5pt 1pt 1.5pt 19pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:700;line-height:100%">Total postretirement and postemployment medical obligations at end of period</span></td><td style="background-color:#ffffff;border-bottom:3pt double #000000;border-top:1pt solid #000000;padding:1.5pt 0 1.5pt 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:700;line-height:100%">$</span></td><td style="background-color:#ffffff;border-bottom:3pt double #000000;border-top:1pt solid #000000;padding:1.5pt 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:700;line-height:100%">292</span><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%"> </span></td><td style="background-color:#ffffff;border-bottom:3pt double #000000;border-top:1pt solid #000000;padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"></td></tr></table></div><div style="margin-top:10pt;text-indent:36pt"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%">In accordance with the accounting standard related to postretirement benefits other than pensions, actuarial gains and losses are not recognized in income but are instead recorded in accumulated other income on Tri-State's consolidated statements of financial position. If the unrecognized amount is in excess of 10 percent of the projected benefit obligation, amounts are reclassified out of accumulated other comprehensive income and included in net income as the excess is amortized over the average remaining service lives of the active plan participants. Unrecognized actuarial gains and losses have been determined per actuarial studies for the postretirement medical benefit obligation.</span></div><div style="margin-top:10pt;text-indent:36pt"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%">The net unrecognized actuarial gain related to the postretirement medical benefit obligations is included in accumulated other comprehensive income as follows (dollars in thousands):</span></div><div style="margin-top:5pt"><table style="border-collapse:collapse;display:inline-table;margin-bottom:5pt;vertical-align:text-bottom;width:100.000%"><tr><td style="width:1.0%"></td><td style="width:79.455%"></td><td style="width:0.1%"></td><td style="width:1.0%"></td><td style="width:18.345%"></td><td style="width:0.1%"></td></tr><tr><td colspan="3" style="padding:0 1pt"></td><td colspan="3" style="padding:1.5pt 1pt;text-align:center;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:700;line-height:100%">Nine Months Ended September 30, 2026</span></td></tr><tr><td colspan="3" style="background-color:#cceeff;padding:1.5pt 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">Amounts included in accumulated other comprehensive income at beginning of period</span></td><td style="background-color:#cceeff;border-top:1pt solid #000000;padding:1.5pt 0 1.5pt 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">$</span></td><td style="background-color:#cceeff;border-top:1pt solid #000000;padding:1.5pt 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">161 </span></td><td style="background-color:#cceeff;border-top:1pt solid #000000;padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"></td></tr><tr><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td></tr><tr><td colspan="3" style="background-color:#ffffff;padding:1.5pt 1pt 1.5pt 7pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">Amortization of actuarial gain into other income</span></td><td colspan="2" style="background-color:#ffffff;padding:1.5pt 0 1.5pt 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">(100)</span></td><td style="background-color:#ffffff;padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"></td></tr><tr><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td></tr><tr><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td></tr><tr><td colspan="3" style="background-color:#cceeff;padding:1.5pt 1pt 1.5pt 12.25pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:700;line-height:100%">Amounts included in accumulated other comprehensive income at end of period</span></td><td style="background-color:#cceeff;border-bottom:3pt double #000000;border-top:1pt solid #000;padding:1.5pt 0 1.5pt 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:700;line-height:100%">$</span></td><td style="background-color:#cceeff;border-bottom:3pt double #000000;border-top:1pt solid #000;padding:1.5pt 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:700;line-height:100%">61</span><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%"> </span></td><td style="background-color:#cceeff;border-bottom:3pt double #000000;border-top:1pt solid #000;padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"></td></tr></table></div><div style="margin-top:10pt;padding-left:18pt"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-style:italic;font-weight:400;line-height:120%">Defined Benefit Plans</span></div><div style="margin-top:10pt;text-indent:36pt"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%">Tri-State participates in the NRECA Pension Restoration Plan and the NRECA Executive Benefit Restoration Plan, both of which are intended to provide a supplemental benefit to the defined benefit plan for an eligible group of highly compensated employees. Eligible employees include the Chief Executive Officer and any other employees that become eligible. All of Tri-State's executive employees with a hire date prior to May 1, 2021 participate in one of the following pension restoration plans: the NRECA Pension Restoration Plan or the NRECA Executive Benefit Restoration Plan. Eligibility is determined annually and is based on January 1 base salary that exceeds the limits of the defined benefit plan. Employees hired May 1, 2021 or later are not eligible for either plan.</span></div><div style="margin-top:10pt;text-indent:36pt"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%">The NRECA Executive Benefit Restoration Plan obligations are determined annually (during the first quarter of the subsequent year) by an NRECA actuary. The executive benefit restoration obligation is included in accumulated postretirement benefit and post employment obligations on Tri-State's consolidated statements of financial position as follows (dollars in thousands):</span></div><div style="margin-top:5pt"><table style="border-collapse:collapse;display:inline-table;margin-bottom:5pt;vertical-align:text-bottom;width:100.000%"><tr><td style="width:1.0%"></td><td style="width:79.455%"></td><td style="width:0.1%"></td><td style="width:1.0%"></td><td style="width:18.345%"></td><td style="width:0.1%"></td></tr><tr><td colspan="3" style="padding:0 1pt"></td><td colspan="3" style="padding:1.5pt 1pt;text-align:center;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:700;line-height:100%">Nine Months Ended September 30, 2026</span></td></tr><tr><td colspan="3" style="background-color:#cceeff;padding:1.5pt 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">Executive benefit restoration obligation at beginning of period</span></td><td style="background-color:#cceeff;border-top:1pt solid #000000;padding:1.5pt 0 1.5pt 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">$</span></td><td style="background-color:#cceeff;border-top:1pt solid #000000;padding:1.5pt 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">8,534 </span></td><td style="background-color:#cceeff;border-top:1pt solid #000000;padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"></td></tr><tr><td colspan="3" style="background-color:#ffffff;padding:1.5pt 1pt 1.5pt 7pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">Service cost</span></td><td colspan="2" style="background-color:#ffffff;padding:1.5pt 0 1.5pt 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">375 </span></td><td style="background-color:#ffffff;padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"></td></tr><tr><td colspan="3" style="background-color:#cceeff;padding:1.5pt 1pt 1.5pt 7pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">Interest cost</span></td><td colspan="2" style="background-color:#cceeff;padding:1.5pt 0 1.5pt 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">319 </span></td><td style="background-color:#cceeff;padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"></td></tr><tr><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td></tr><tr><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td></tr><tr><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td></tr><tr><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td></tr><tr><td colspan="3" style="background-color:#ffffff;padding:1.5pt 1pt 1.5pt 18.25pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:700;line-height:100%">Executive benefit restoration at end of period</span></td><td style="background-color:#ffffff;border-top:1pt solid #000;padding:1.5pt 0 1.5pt 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:700;line-height:100%">$</span></td><td style="background-color:#ffffff;border-top:1pt solid #000;padding:1.5pt 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:700;line-height:100%">9,228</span><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%"> </span></td><td style="background-color:#ffffff;border-top:1pt solid #000;padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"></td></tr><tr><td colspan="3" style="background-color:#cceeff;padding:1.5pt 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">Fair value of plan assets at beginning of period</span></td><td style="background-color:#cceeff;border-top:1pt solid #000;padding:1.5pt 0 1.5pt 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">$</span></td><td style="background-color:#cceeff;border-top:1pt solid #000;padding:1.5pt 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">10,360 </span></td><td style="background-color:#cceeff;border-top:1pt solid #000;padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"></td></tr><tr><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td></tr><tr><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td></tr><tr><td colspan="3" style="background-color:#ffffff;padding:1.5pt 1pt 1.5pt 7pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">Actual return on plan assets</span></td><td colspan="2" style="background-color:#ffffff;padding:1.5pt 0 1.5pt 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">35 </span></td><td style="background-color:#ffffff;padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"></td></tr><tr><td colspan="3" style="background-color:#cceeff;padding:1.5pt 1pt 1.5pt 13pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:700;line-height:100%">Fair value of plan assets at end of period</span></td><td style="background-color:#cceeff;border-top:1pt solid #000;padding:1.5pt 0 1.5pt 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:700;line-height:100%">$</span></td><td style="background-color:#cceeff;border-top:1pt solid #000;padding:1.5pt 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:700;line-height:100%">10,395</span><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%"> </span></td><td style="background-color:#cceeff;border-top:1pt solid #000;padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"></td></tr><tr><td colspan="3" style="background-color:#ffffff;padding:1.5pt 1pt 1.5pt 19pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:700;line-height:100%">Net asset at end of period</span></td><td style="background-color:#ffffff;border-bottom:3pt double #000;border-top:1pt solid #000;padding:1.5pt 0 1.5pt 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:700;line-height:100%">$</span></td><td style="background-color:#ffffff;border-bottom:3pt double #000;border-top:1pt solid #000;padding:1.5pt 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:700;line-height:100%">1,167</span><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%"> </span></td><td style="background-color:#ffffff;border-bottom:3pt double #000;border-top:1pt solid #000;padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"></td></tr></table></div><div style="margin-top:10pt;text-indent:36pt"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%">Tri-State has an irrevocable trust with an independent third party to fund the NRECA Executive Benefit Restoration Plan. The trust is funded quarterly to the prior year obligation as determined by the NRECA actuary.</span></div><div style="margin-top:10pt;text-indent:36pt"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%">In accordance with the accounting standard related to defined benefit pension plans, actuarial gains and losses are not recognized in income but are instead recorded in accumulated other income on Tri-State's consolidated statements of financial position. If the unrecognized amount is in excess of 10 percent of the projected benefit obligation, amounts are reclassified out of accumulated other comprehensive income and included in net income as the excess is amortized over the average remaining service lives of the active plan participants. Unrecognized actuarial gains and losses have been determined per actuarial studies for the executive benefit restoration obligation.</span></div><div style="margin-top:10pt;text-indent:36pt"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%">The net unrecognized actuarial gain and prior service cost related to the executive benefit restoration obligations are included in accumulated other comprehensive income as follows (dollars in thousands):</span></div><div style="margin-top:5pt"><table style="border-collapse:collapse;display:inline-table;margin-bottom:5pt;vertical-align:text-bottom;width:100.000%"><tr><td style="width:1.0%"></td><td style="width:79.455%"></td><td style="width:0.1%"></td><td style="width:1.0%"></td><td style="width:18.345%"></td><td style="width:0.1%"></td></tr><tr><td colspan="3" style="padding:0 1pt"></td><td colspan="3" style="padding:1.5pt 1pt;text-align:center;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:700;line-height:100%">Nine Months Ended September 30, 2026</span></td></tr><tr><td colspan="3" style="background-color:#cceeff;padding:1.5pt 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">Prior service cost at beginning of period</span></td><td style="background-color:#cceeff;border-top:1pt solid #000000;padding:1.5pt 0 1.5pt 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">$</span></td><td style="background-color:#cceeff;border-top:1pt solid #000000;padding:1.5pt 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">(1,176)</span></td><td style="background-color:#cceeff;border-top:1pt solid #000000;padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"></td></tr><tr><td colspan="3" style="background-color:#ffffff;padding:1.5pt 1pt 1.5pt 7pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">Amortization of prior service cost into other income</span></td><td colspan="2" style="background-color:#ffffff;padding:1.5pt 0 1.5pt 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">238 </span></td><td style="background-color:#ffffff;padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"></td></tr><tr><td colspan="3" style="background-color:#cceeff;padding:1.5pt 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">Prior service cost at end of period</span></td><td style="background-color:#cceeff;border-top:1pt solid #000;padding:1.5pt 0 1.5pt 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">$</span></td><td style="background-color:#cceeff;border-top:1pt solid #000;padding:1.5pt 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">(938)</span></td><td style="background-color:#cceeff;border-top:1pt solid #000;padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"></td></tr><tr><td colspan="3" style="background-color:#ffffff;padding:1.5pt 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">Unrecognized actuarial gain at beginning of period</span></td><td style="background-color:#ffffff;border-top:1pt solid #000;padding:1.5pt 0 1.5pt 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">$</span></td><td style="background-color:#ffffff;border-top:1pt solid #000;padding:1.5pt 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">2,545 </span></td><td style="background-color:#ffffff;border-top:1pt solid #000;padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"></td></tr><tr><td colspan="3" style="background-color:#cceeff;padding:1.5pt 1pt 1.5pt 7pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">Amortization of actuarial gain</span></td><td colspan="2" style="background-color:#cceeff;padding:1.5pt 0 1.5pt 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">(235)</span></td><td style="background-color:#cceeff;padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"></td></tr><tr><td colspan="3" style="background-color:#ffffff;padding:1.5pt 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">Unrecognized actuarial gain at end of period</span></td><td style="background-color:#ffffff;border-top:1pt solid #000;padding:1.5pt 0 1.5pt 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">$</span></td><td style="background-color:#ffffff;border-top:1pt solid #000;padding:1.5pt 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">2,310 </span></td><td style="background-color:#ffffff;border-top:1pt solid #000;padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"></td></tr><tr><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td></tr><tr><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td></tr><tr><td colspan="3" style="background-color:#cceeff;padding:1.5pt 1pt 1.5pt 12.25pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:700;line-height:100%">Accumulated other comprehensive income at end of period</span></td><td style="background-color:#cceeff;border-bottom:3pt double #000000;border-top:1pt solid #000;padding:1.5pt 0 1.5pt 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:700;line-height:100%">$</span></td><td style="background-color:#cceeff;border-bottom:3pt double #000000;border-top:1pt solid #000;padding:1.5pt 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:700;line-height:100%">1,372</span><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%"> </span></td><td style="background-color:#cceeff;border-bottom:3pt double #000000;border-top:1pt solid #000;padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"></td></tr></table></div><div style="margin-top:10pt;padding-left:18pt"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-style:italic;font-weight:400;line-height:120%">Net Periodic Benefit Cost</span></div><div style="margin-top:10pt;text-indent:36pt"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%">Components of net periodic benefit cost for the nine months ended September 30, 2026 are as follows (dollars in thousands):</span></div><div style="margin-top:10pt"><table style="border-collapse:collapse;display:inline-table;margin-bottom:5pt;vertical-align:text-bottom;width:100.000%"><tr><td style="width:1.0%"></td><td style="width:39.981%"></td><td style="width:0.1%"></td><td style="width:1.0%"></td><td style="width:18.344%"></td><td style="width:0.1%"></td><td style="width:0.1%"></td><td style="width:0.530%"></td><td style="width:0.1%"></td><td style="width:1.0%"></td><td style="width:18.344%"></td><td style="width:0.1%"></td><td style="width:0.1%"></td><td style="width:0.823%"></td><td style="width:0.1%"></td><td style="width:1.0%"></td><td style="width:17.178%"></td><td style="width:0.1%"></td></tr><tr><td colspan="3" style="padding:0 1pt"></td><td colspan="3" style="padding:1.5pt 1pt;text-align:center;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:700;line-height:100%">Postretirement Benefits</span></td><td colspan="3" style="padding:0 1pt"></td><td colspan="3" style="padding:1.5pt 1pt;text-align:center;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:700;line-height:100%">Executive Benefit Restoration</span></td><td colspan="3" style="padding:0 1pt"></td><td colspan="3" style="padding:1.5pt 1pt;text-align:center;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:700;line-height:100%">Total Periodic Benefit Cost</span></td></tr><tr><td colspan="3" style="background-color:#cceeff;padding:1.5pt 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">Service cost</span></td><td style="background-color:#cceeff;border-top:1pt solid #000;padding:1.5pt 0 1.5pt 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">$</span></td><td style="background-color:#cceeff;border-top:1pt solid #000;padding:1.5pt 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">— </span></td><td style="background-color:#cceeff;border-top:1pt solid #000;padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"></td><td colspan="3" style="background-color:#cceeff;padding:0 1pt"></td><td style="background-color:#cceeff;border-top:1pt solid #000;padding:1.5pt 0 1.5pt 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">$</span></td><td style="background-color:#cceeff;border-top:1pt solid #000;padding:1.5pt 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">375 </span></td><td style="background-color:#cceeff;border-top:1pt solid #000;padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"></td><td colspan="3" style="background-color:#cceeff;padding:0 1pt"></td><td style="background-color:#cceeff;border-top:1pt solid #000;padding:1.5pt 0 1.5pt 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">$</span></td><td style="background-color:#cceeff;border-top:1pt solid #000;padding:1.5pt 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">375 </span></td><td style="background-color:#cceeff;border-top:1pt solid #000;padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"></td></tr><tr><td colspan="3" style="background-color:#ffffff;padding:1.5pt 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">Interest cost</span></td><td colspan="2" style="background-color:#ffffff;padding:1.5pt 0 1.5pt 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">16 </span></td><td style="background-color:#ffffff;padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"></td><td colspan="3" style="background-color:#ffffff;padding:0 1pt"></td><td colspan="2" style="background-color:#ffffff;padding:1.5pt 0 1.5pt 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">319 </span></td><td style="background-color:#ffffff;padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"></td><td colspan="3" style="background-color:#ffffff;padding:0 1pt"></td><td colspan="2" style="background-color:#ffffff;padding:1.5pt 0 1.5pt 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">335 </span></td><td style="background-color:#ffffff;padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"></td></tr><tr><td colspan="3" style="background-color:#cceeff;padding:1.5pt 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">Amortization of prior service cost</span></td><td colspan="2" style="background-color:#cceeff;padding:1.5pt 0 1.5pt 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">— </span></td><td style="background-color:#cceeff;padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"></td><td colspan="3" style="background-color:#cceeff;padding:0 1pt"></td><td colspan="2" style="background-color:#cceeff;padding:1.5pt 0 1.5pt 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">238 </span></td><td style="background-color:#cceeff;padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"></td><td colspan="3" style="background-color:#cceeff;padding:0 1pt"></td><td colspan="2" style="background-color:#cceeff;padding:1.5pt 0 1.5pt 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">238 </span></td><td style="background-color:#cceeff;padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"></td></tr><tr><td colspan="3" style="background-color:#ffffff;padding:1.5pt 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">Amortization of actuarial gain</span></td><td colspan="2" style="background-color:#ffffff;padding:1.5pt 0 1.5pt 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">(100)</span></td><td style="background-color:#ffffff;padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"></td><td colspan="3" style="background-color:#ffffff;padding:0 1pt"></td><td colspan="2" style="background-color:#ffffff;padding:1.5pt 0 1.5pt 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">(235)</span></td><td style="background-color:#ffffff;padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"></td><td colspan="3" style="background-color:#ffffff;padding:0 1pt"></td><td colspan="2" style="background-color:#ffffff;padding:1.5pt 0 1.5pt 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">(335)</span></td><td style="background-color:#ffffff;padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"></td></tr><tr><td colspan="3" style="background-color:#cceeff;padding:1.5pt 1pt 1.5pt 12.25pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:700;line-height:100%">Net periodic benefit cost</span></td><td style="background-color:#cceeff;border-bottom:3pt double #000;border-top:1pt solid #000;padding:1.5pt 0 1.5pt 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">$</span></td><td style="background-color:#cceeff;border-bottom:3pt double #000;border-top:1pt solid #000;padding:1.5pt 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">(84)</span></td><td style="background-color:#cceeff;border-bottom:3pt double #000;border-top:1pt solid #000;padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"></td><td colspan="3" style="background-color:#cceeff;padding:0 1pt"></td><td style="background-color:#cceeff;border-bottom:3pt double #000;border-top:1pt solid #000;padding:1.5pt 0 1.5pt 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">$</span></td><td style="background-color:#cceeff;border-bottom:3pt double #000;border-top:1pt solid #000;padding:1.5pt 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">697 </span></td><td style="background-color:#cceeff;border-bottom:3pt double #000;border-top:1pt solid #000;padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"></td><td colspan="3" style="background-color:#cceeff;padding:0 1pt"></td><td style="background-color:#cceeff;border-bottom:3pt double #000;border-top:1pt solid #000;padding:1.5pt 0 1.5pt 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">$</span></td><td style="background-color:#cceeff;border-bottom:3pt double #000;border-top:1pt solid #000;padding:1.5pt 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">613 </span></td><td style="background-color:#cceeff;border-bottom:3pt double #000;border-top:1pt solid #000;padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"></td></tr></table></div><div style="margin-top:10pt;text-indent:36pt"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%">The service cost component of Tri-State's net periodic benefit cost is included in operating expenses on its consolidated statements of operations. The components of net periodic benefit cost other than the service cost component are included in other income (expense) on Tri-State's consolidated statements of operations.</span></div> 3 P65Y 2 P55Y 3 <div style="margin-top:10pt;text-indent:36pt"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%">The postretirement medical benefit and post employment medical benefit obligations are determined annually (during the fourth quarter) by an independent actuary. The postretirement medical benefit and post employment medical benefit obligations are included in accumulated postretirement benefit and post employment obligations on Tri-State's consolidated statements of financial position as follows (dollars in thousands):</span></div><div style="margin-top:5pt"><table style="border-collapse:collapse;display:inline-table;margin-bottom:5pt;vertical-align:text-bottom;width:100.000%"><tr><td style="width:1.0%"></td><td style="width:79.455%"></td><td style="width:0.1%"></td><td style="width:1.0%"></td><td style="width:18.345%"></td><td style="width:0.1%"></td></tr><tr><td colspan="3" style="padding:0 1pt"></td><td colspan="3" style="padding:1.5pt 1pt;text-align:center;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:700;line-height:100%">Nine Months Ended September 30, 2026</span></td></tr><tr><td colspan="3" style="background-color:#cceeff;padding:1.5pt 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">Postretirement medical benefit obligation at beginning of period</span></td><td style="background-color:#cceeff;border-top:1pt solid #000000;padding:1.5pt 0 1.5pt 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">$</span></td><td style="background-color:#cceeff;border-top:1pt solid #000000;padding:1.5pt 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">347 </span></td><td style="background-color:#cceeff;border-top:1pt solid #000000;padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"></td></tr><tr><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td></tr><tr><td colspan="3" style="background-color:#ffffff;padding:1.5pt 1pt 1.5pt 7pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">Interest cost</span></td><td colspan="2" style="background-color:#ffffff;padding:1.5pt 0 1.5pt 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">16 </span></td><td style="background-color:#ffffff;padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"></td></tr><tr><td colspan="3" style="background-color:#cceeff;padding:1.5pt 1pt 1.5pt 7pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">Benefit payments (net of contributions by participants)</span></td><td colspan="2" style="background-color:#cceeff;padding:1.5pt 0 1.5pt 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">(170)</span></td><td style="background-color:#cceeff;padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"></td></tr><tr><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td></tr><tr><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td></tr><tr><td colspan="3" style="background-color:#ffffff;padding:1.5pt 1pt 1.5pt 12.25pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:700;line-height:100%">Postretirement medical benefit obligation at end of period</span></td><td style="background-color:#ffffff;border-top:1pt solid #000;padding:1.5pt 0 1.5pt 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:700;line-height:100%">$</span></td><td style="background-color:#ffffff;border-top:1pt solid #000;padding:1.5pt 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:700;line-height:100%">193</span><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%"> </span></td><td style="background-color:#ffffff;border-top:1pt solid #000;padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"></td></tr><tr><td colspan="3" style="background-color:#cceeff;padding:1.5pt 1pt 1.5pt 12.25pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">Postemployment medical benefit obligation at end of period</span></td><td colspan="2" style="background-color:#cceeff;padding:1.5pt 0 1.5pt 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">99 </span></td><td style="background-color:#cceeff;padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"></td></tr><tr><td colspan="3" style="background-color:#ffffff;padding:1.5pt 1pt 1.5pt 19pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:700;line-height:100%">Total postretirement and postemployment medical obligations at end of period</span></td><td style="background-color:#ffffff;border-bottom:3pt double #000000;border-top:1pt solid #000000;padding:1.5pt 0 1.5pt 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:700;line-height:100%">$</span></td><td style="background-color:#ffffff;border-bottom:3pt double #000000;border-top:1pt solid #000000;padding:1.5pt 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:700;line-height:100%">292</span><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%"> </span></td><td style="background-color:#ffffff;border-bottom:3pt double #000000;border-top:1pt solid #000000;padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"></td></tr></table></div><div style="margin-top:10pt;text-indent:36pt"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%">The NRECA Executive Benefit Restoration Plan obligations are determined annually (during the first quarter of the subsequent year) by an NRECA actuary. The executive benefit restoration obligation is included in accumulated postretirement benefit and post employment obligations on Tri-State's consolidated statements of financial position as follows (dollars in thousands):</span></div><div style="margin-top:5pt"><table style="border-collapse:collapse;display:inline-table;margin-bottom:5pt;vertical-align:text-bottom;width:100.000%"><tr><td style="width:1.0%"></td><td style="width:79.455%"></td><td style="width:0.1%"></td><td style="width:1.0%"></td><td style="width:18.345%"></td><td style="width:0.1%"></td></tr><tr><td colspan="3" style="padding:0 1pt"></td><td colspan="3" style="padding:1.5pt 1pt;text-align:center;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:700;line-height:100%">Nine Months Ended September 30, 2026</span></td></tr><tr><td colspan="3" style="background-color:#cceeff;padding:1.5pt 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">Executive benefit restoration obligation at beginning of period</span></td><td style="background-color:#cceeff;border-top:1pt solid #000000;padding:1.5pt 0 1.5pt 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">$</span></td><td style="background-color:#cceeff;border-top:1pt solid #000000;padding:1.5pt 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">8,534 </span></td><td style="background-color:#cceeff;border-top:1pt solid #000000;padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"></td></tr><tr><td colspan="3" style="background-color:#ffffff;padding:1.5pt 1pt 1.5pt 7pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">Service cost</span></td><td colspan="2" style="background-color:#ffffff;padding:1.5pt 0 1.5pt 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">375 </span></td><td style="background-color:#ffffff;padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"></td></tr><tr><td colspan="3" style="background-color:#cceeff;padding:1.5pt 1pt 1.5pt 7pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">Interest cost</span></td><td colspan="2" style="background-color:#cceeff;padding:1.5pt 0 1.5pt 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">319 </span></td><td style="background-color:#cceeff;padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"></td></tr><tr><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td></tr><tr><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td></tr><tr><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td></tr><tr><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td></tr><tr><td colspan="3" style="background-color:#ffffff;padding:1.5pt 1pt 1.5pt 18.25pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:700;line-height:100%">Executive benefit restoration at end of period</span></td><td style="background-color:#ffffff;border-top:1pt solid #000;padding:1.5pt 0 1.5pt 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:700;line-height:100%">$</span></td><td style="background-color:#ffffff;border-top:1pt solid #000;padding:1.5pt 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:700;line-height:100%">9,228</span><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%"> </span></td><td style="background-color:#ffffff;border-top:1pt solid #000;padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"></td></tr><tr><td colspan="3" style="background-color:#cceeff;padding:1.5pt 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">Fair value of plan assets at beginning of period</span></td><td style="background-color:#cceeff;border-top:1pt solid #000;padding:1.5pt 0 1.5pt 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">$</span></td><td style="background-color:#cceeff;border-top:1pt solid #000;padding:1.5pt 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">10,360 </span></td><td style="background-color:#cceeff;border-top:1pt solid #000;padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"></td></tr><tr><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td></tr><tr><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td></tr><tr><td colspan="3" style="background-color:#ffffff;padding:1.5pt 1pt 1.5pt 7pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">Actual return on plan assets</span></td><td colspan="2" style="background-color:#ffffff;padding:1.5pt 0 1.5pt 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">35 </span></td><td style="background-color:#ffffff;padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"></td></tr><tr><td colspan="3" style="background-color:#cceeff;padding:1.5pt 1pt 1.5pt 13pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:700;line-height:100%">Fair value of plan assets at end of period</span></td><td style="background-color:#cceeff;border-top:1pt solid #000;padding:1.5pt 0 1.5pt 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:700;line-height:100%">$</span></td><td style="background-color:#cceeff;border-top:1pt solid #000;padding:1.5pt 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:700;line-height:100%">10,395</span><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%"> </span></td><td style="background-color:#cceeff;border-top:1pt solid #000;padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"></td></tr><tr><td colspan="3" style="background-color:#ffffff;padding:1.5pt 1pt 1.5pt 19pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:700;line-height:100%">Net asset at end of period</span></td><td style="background-color:#ffffff;border-bottom:3pt double #000;border-top:1pt solid #000;padding:1.5pt 0 1.5pt 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:700;line-height:100%">$</span></td><td style="background-color:#ffffff;border-bottom:3pt double #000;border-top:1pt solid #000;padding:1.5pt 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:700;line-height:100%">1,167</span><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%"> </span></td><td style="background-color:#ffffff;border-bottom:3pt double #000;border-top:1pt solid #000;padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"></td></tr></table></div> 347000 16000 170000 193000 99000 292000 0.10 <div style="margin-top:10pt;text-indent:36pt"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%">The net unrecognized actuarial gain related to the postretirement medical benefit obligations is included in accumulated other comprehensive income as follows (dollars in thousands):</span></div><div style="margin-top:5pt"><table style="border-collapse:collapse;display:inline-table;margin-bottom:5pt;vertical-align:text-bottom;width:100.000%"><tr><td style="width:1.0%"></td><td style="width:79.455%"></td><td style="width:0.1%"></td><td style="width:1.0%"></td><td style="width:18.345%"></td><td style="width:0.1%"></td></tr><tr><td colspan="3" style="padding:0 1pt"></td><td colspan="3" style="padding:1.5pt 1pt;text-align:center;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:700;line-height:100%">Nine Months Ended September 30, 2026</span></td></tr><tr><td colspan="3" style="background-color:#cceeff;padding:1.5pt 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">Amounts included in accumulated other comprehensive income at beginning of period</span></td><td style="background-color:#cceeff;border-top:1pt solid #000000;padding:1.5pt 0 1.5pt 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">$</span></td><td style="background-color:#cceeff;border-top:1pt solid #000000;padding:1.5pt 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">161 </span></td><td style="background-color:#cceeff;border-top:1pt solid #000000;padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"></td></tr><tr><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td></tr><tr><td colspan="3" style="background-color:#ffffff;padding:1.5pt 1pt 1.5pt 7pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">Amortization of actuarial gain into other income</span></td><td colspan="2" style="background-color:#ffffff;padding:1.5pt 0 1.5pt 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">(100)</span></td><td style="background-color:#ffffff;padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"></td></tr><tr><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td></tr><tr><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td></tr><tr><td colspan="3" style="background-color:#cceeff;padding:1.5pt 1pt 1.5pt 12.25pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:700;line-height:100%">Amounts included in accumulated other comprehensive income at end of period</span></td><td style="background-color:#cceeff;border-bottom:3pt double #000000;border-top:1pt solid #000;padding:1.5pt 0 1.5pt 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:700;line-height:100%">$</span></td><td style="background-color:#cceeff;border-bottom:3pt double #000000;border-top:1pt solid #000;padding:1.5pt 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:700;line-height:100%">61</span><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%"> </span></td><td style="background-color:#cceeff;border-bottom:3pt double #000000;border-top:1pt solid #000;padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"></td></tr></table></div><div style="margin-top:10pt;text-indent:36pt"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%">The net unrecognized actuarial gain and prior service cost related to the executive benefit restoration obligations are included in accumulated other comprehensive income as follows (dollars in thousands):</span></div><div style="margin-top:5pt"><table style="border-collapse:collapse;display:inline-table;margin-bottom:5pt;vertical-align:text-bottom;width:100.000%"><tr><td style="width:1.0%"></td><td style="width:79.455%"></td><td style="width:0.1%"></td><td style="width:1.0%"></td><td style="width:18.345%"></td><td style="width:0.1%"></td></tr><tr><td colspan="3" style="padding:0 1pt"></td><td colspan="3" style="padding:1.5pt 1pt;text-align:center;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:700;line-height:100%">Nine Months Ended September 30, 2026</span></td></tr><tr><td colspan="3" style="background-color:#cceeff;padding:1.5pt 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">Prior service cost at beginning of period</span></td><td style="background-color:#cceeff;border-top:1pt solid #000000;padding:1.5pt 0 1.5pt 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">$</span></td><td style="background-color:#cceeff;border-top:1pt solid #000000;padding:1.5pt 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">(1,176)</span></td><td style="background-color:#cceeff;border-top:1pt solid #000000;padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"></td></tr><tr><td colspan="3" style="background-color:#ffffff;padding:1.5pt 1pt 1.5pt 7pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">Amortization of prior service cost into other income</span></td><td colspan="2" style="background-color:#ffffff;padding:1.5pt 0 1.5pt 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">238 </span></td><td style="background-color:#ffffff;padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"></td></tr><tr><td colspan="3" style="background-color:#cceeff;padding:1.5pt 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">Prior service cost at end of period</span></td><td style="background-color:#cceeff;border-top:1pt solid #000;padding:1.5pt 0 1.5pt 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">$</span></td><td style="background-color:#cceeff;border-top:1pt solid #000;padding:1.5pt 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">(938)</span></td><td style="background-color:#cceeff;border-top:1pt solid #000;padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"></td></tr><tr><td colspan="3" style="background-color:#ffffff;padding:1.5pt 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">Unrecognized actuarial gain at beginning of period</span></td><td style="background-color:#ffffff;border-top:1pt solid #000;padding:1.5pt 0 1.5pt 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">$</span></td><td style="background-color:#ffffff;border-top:1pt solid #000;padding:1.5pt 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">2,545 </span></td><td style="background-color:#ffffff;border-top:1pt solid #000;padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"></td></tr><tr><td colspan="3" style="background-color:#cceeff;padding:1.5pt 1pt 1.5pt 7pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">Amortization of actuarial gain</span></td><td colspan="2" style="background-color:#cceeff;padding:1.5pt 0 1.5pt 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">(235)</span></td><td style="background-color:#cceeff;padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"></td></tr><tr><td colspan="3" style="background-color:#ffffff;padding:1.5pt 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">Unrecognized actuarial gain at end of period</span></td><td style="background-color:#ffffff;border-top:1pt solid #000;padding:1.5pt 0 1.5pt 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">$</span></td><td style="background-color:#ffffff;border-top:1pt solid #000;padding:1.5pt 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">2,310 </span></td><td style="background-color:#ffffff;border-top:1pt solid #000;padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"></td></tr><tr><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td></tr><tr><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td></tr><tr><td colspan="3" style="background-color:#cceeff;padding:1.5pt 1pt 1.5pt 12.25pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:700;line-height:100%">Accumulated other comprehensive income at end of period</span></td><td style="background-color:#cceeff;border-bottom:3pt double #000000;border-top:1pt solid #000;padding:1.5pt 0 1.5pt 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:700;line-height:100%">$</span></td><td style="background-color:#cceeff;border-bottom:3pt double #000000;border-top:1pt solid #000;padding:1.5pt 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:700;line-height:100%">1,372</span><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%"> </span></td><td style="background-color:#cceeff;border-bottom:3pt double #000000;border-top:1pt solid #000;padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"></td></tr></table></div> 161000 100000 61000 8534000 375000 319000 9228000 10360000 35000 10395000 1167000 0.10 1176000 238000 938000 2545000 235000 2310000 -1372000 <div style="margin-top:10pt;text-indent:36pt"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%">Components of net periodic benefit cost for the nine months ended September 30, 2026 are as follows (dollars in thousands):</span></div><div style="margin-top:10pt"><table style="border-collapse:collapse;display:inline-table;margin-bottom:5pt;vertical-align:text-bottom;width:100.000%"><tr><td style="width:1.0%"></td><td style="width:39.981%"></td><td style="width:0.1%"></td><td style="width:1.0%"></td><td style="width:18.344%"></td><td style="width:0.1%"></td><td style="width:0.1%"></td><td style="width:0.530%"></td><td style="width:0.1%"></td><td style="width:1.0%"></td><td style="width:18.344%"></td><td style="width:0.1%"></td><td style="width:0.1%"></td><td style="width:0.823%"></td><td style="width:0.1%"></td><td style="width:1.0%"></td><td style="width:17.178%"></td><td style="width:0.1%"></td></tr><tr><td colspan="3" style="padding:0 1pt"></td><td colspan="3" style="padding:1.5pt 1pt;text-align:center;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:700;line-height:100%">Postretirement Benefits</span></td><td colspan="3" style="padding:0 1pt"></td><td colspan="3" style="padding:1.5pt 1pt;text-align:center;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:700;line-height:100%">Executive Benefit Restoration</span></td><td colspan="3" style="padding:0 1pt"></td><td colspan="3" style="padding:1.5pt 1pt;text-align:center;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:700;line-height:100%">Total Periodic Benefit Cost</span></td></tr><tr><td colspan="3" style="background-color:#cceeff;padding:1.5pt 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">Service cost</span></td><td style="background-color:#cceeff;border-top:1pt solid #000;padding:1.5pt 0 1.5pt 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">$</span></td><td style="background-color:#cceeff;border-top:1pt solid #000;padding:1.5pt 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">— </span></td><td style="background-color:#cceeff;border-top:1pt solid #000;padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"></td><td colspan="3" style="background-color:#cceeff;padding:0 1pt"></td><td style="background-color:#cceeff;border-top:1pt solid #000;padding:1.5pt 0 1.5pt 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">$</span></td><td style="background-color:#cceeff;border-top:1pt solid #000;padding:1.5pt 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">375 </span></td><td style="background-color:#cceeff;border-top:1pt solid #000;padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"></td><td colspan="3" style="background-color:#cceeff;padding:0 1pt"></td><td style="background-color:#cceeff;border-top:1pt solid #000;padding:1.5pt 0 1.5pt 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">$</span></td><td style="background-color:#cceeff;border-top:1pt solid #000;padding:1.5pt 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">375 </span></td><td style="background-color:#cceeff;border-top:1pt solid #000;padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"></td></tr><tr><td colspan="3" style="background-color:#ffffff;padding:1.5pt 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">Interest cost</span></td><td colspan="2" style="background-color:#ffffff;padding:1.5pt 0 1.5pt 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">16 </span></td><td style="background-color:#ffffff;padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"></td><td colspan="3" style="background-color:#ffffff;padding:0 1pt"></td><td colspan="2" style="background-color:#ffffff;padding:1.5pt 0 1.5pt 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">319 </span></td><td style="background-color:#ffffff;padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"></td><td colspan="3" style="background-color:#ffffff;padding:0 1pt"></td><td colspan="2" style="background-color:#ffffff;padding:1.5pt 0 1.5pt 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">335 </span></td><td style="background-color:#ffffff;padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"></td></tr><tr><td colspan="3" style="background-color:#cceeff;padding:1.5pt 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">Amortization of prior service cost</span></td><td colspan="2" style="background-color:#cceeff;padding:1.5pt 0 1.5pt 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">— </span></td><td style="background-color:#cceeff;padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"></td><td colspan="3" style="background-color:#cceeff;padding:0 1pt"></td><td colspan="2" style="background-color:#cceeff;padding:1.5pt 0 1.5pt 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">238 </span></td><td style="background-color:#cceeff;padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"></td><td colspan="3" style="background-color:#cceeff;padding:0 1pt"></td><td colspan="2" style="background-color:#cceeff;padding:1.5pt 0 1.5pt 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">238 </span></td><td style="background-color:#cceeff;padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"></td></tr><tr><td colspan="3" style="background-color:#ffffff;padding:1.5pt 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">Amortization of actuarial gain</span></td><td colspan="2" style="background-color:#ffffff;padding:1.5pt 0 1.5pt 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">(100)</span></td><td style="background-color:#ffffff;padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"></td><td colspan="3" style="background-color:#ffffff;padding:0 1pt"></td><td colspan="2" style="background-color:#ffffff;padding:1.5pt 0 1.5pt 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">(235)</span></td><td style="background-color:#ffffff;padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"></td><td colspan="3" style="background-color:#ffffff;padding:0 1pt"></td><td colspan="2" style="background-color:#ffffff;padding:1.5pt 0 1.5pt 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">(335)</span></td><td style="background-color:#ffffff;padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"></td></tr><tr><td colspan="3" style="background-color:#cceeff;padding:1.5pt 1pt 1.5pt 12.25pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:700;line-height:100%">Net periodic benefit cost</span></td><td style="background-color:#cceeff;border-bottom:3pt double #000;border-top:1pt solid #000;padding:1.5pt 0 1.5pt 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">$</span></td><td style="background-color:#cceeff;border-bottom:3pt double #000;border-top:1pt solid #000;padding:1.5pt 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">(84)</span></td><td style="background-color:#cceeff;border-bottom:3pt double #000;border-top:1pt solid #000;padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"></td><td colspan="3" style="background-color:#cceeff;padding:0 1pt"></td><td style="background-color:#cceeff;border-bottom:3pt double #000;border-top:1pt solid #000;padding:1.5pt 0 1.5pt 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">$</span></td><td style="background-color:#cceeff;border-bottom:3pt double #000;border-top:1pt solid #000;padding:1.5pt 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">697 </span></td><td style="background-color:#cceeff;border-bottom:3pt double #000;border-top:1pt solid #000;padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"></td><td colspan="3" style="background-color:#cceeff;padding:0 1pt"></td><td style="background-color:#cceeff;border-bottom:3pt double #000;border-top:1pt solid #000;padding:1.5pt 0 1.5pt 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">$</span></td><td style="background-color:#cceeff;border-bottom:3pt double #000;border-top:1pt solid #000;padding:1.5pt 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">613 </span></td><td style="background-color:#cceeff;border-bottom:3pt double #000;border-top:1pt solid #000;padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"></td></tr></table></div> 0 375000 375000 16000 319000 335000 0 238000 238000 100000 235000 335000 -84000 697000 613000 REVENUE<div style="margin-top:10pt;padding-left:18pt"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-style:italic;font-weight:400;line-height:120%">Revenue from Contracts with Customers</span></div><div style="margin-top:10pt;text-indent:36pt"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%">Tri-State's electric sales revenues are derived from wholesale electric service sales to the Utility Members and non-member purchasers. </span></div><div style="margin-top:10pt;padding-left:18pt"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-style:italic;font-weight:400;line-height:120%">Member electric sales</span><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%">.</span></div><div style="margin-top:10pt;text-indent:36pt"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%">Tri-State's Class A rate schedule (A-41) for power sales to the Utility Members on file with FERC includes a formulary rate, which can be adjusted annually based on the budget approved by Tri-State's Board, including an annual true-up mechanism. Tri-State's A-41 rate includes energy and demand components.</span></div><div style="margin-top:10pt;text-indent:36pt"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%">Energy and demand have the same pattern of transfer to the Utility Members and are both measurements of the power provided to the Utility Members. Therefore, the provision of power to Utility Members is one performance obligation. Prior to Utility Members’ requirement for power, Tri-State does not have a contractual right to consideration as Tri-State is not obligated to provide power until the Utility Member requires each incremental unit of power. Tri-State transfers control of the power to Utility Members over time and Utility Members simultaneously receive and consume the benefits of the power. Progress toward completion of Tri-State's performance obligation is measured using the output method: meter readings are taken at the end of each month for billing purposes, energy and demand are determined after the meter readings and Utility Members are invoiced based on the meter reading. Payments from Utility Members are received in accordance with the wholesale electric service contracts’ terms, which is less than 30 days from the invoice date. Utility Member electric sales revenue is recorded as Utility Member electric sales on Tri-State's consolidated statements of operations and Accounts receivable – Utility Members on Tri-State's consolidated statements of financial position.</span></div><div style="margin-top:10pt;text-indent:36pt"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%">In addition to Utility Member electric sales, Tri-State has non-member electric sales, transmission revenue and other operating revenue which consist of several revenue streams. On April 1, 2026, certain of Tri-State's load and transmission facilities in the Western Interconnection became part of Southwest Power Pool's ("SPP") expansion of its regional transmission organization into the Western Interconnection. Certain of Tri-State's load and generating facilities participate in SPP's integrated </span></div><div style="margin-top:10pt"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%">marketplace. The following revenue is reflected on Tri-State's consolidated statements of operations as follows (dollars in thousands):</span></div><div style="margin-top:5pt"><table style="border-collapse:collapse;display:inline-table;margin-bottom:5pt;vertical-align:text-bottom;width:100.000%"><tr><td style="width:1.0%"></td><td style="width:45.537%"></td><td style="width:0.1%"></td><td style="width:1.0%"></td><td style="width:11.911%"></td><td style="width:0.1%"></td><td style="width:0.1%"></td><td style="width:0.530%"></td><td style="width:0.1%"></td><td style="width:1.0%"></td><td style="width:11.911%"></td><td style="width:0.1%"></td><td style="width:0.1%"></td><td style="width:0.530%"></td><td style="width:0.1%"></td><td style="width:1.0%"></td><td style="width:10.595%"></td><td style="width:0.1%"></td><td style="width:0.1%"></td><td style="width:0.530%"></td><td style="width:0.1%"></td><td style="width:1.0%"></td><td style="width:12.356%"></td><td style="width:0.1%"></td></tr><tr><td colspan="3" style="padding:0 1pt"></td><td colspan="9" style="padding:1.5pt 1pt;text-align:center;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:700;line-height:100%">Three Months Ended September 30,</span></td><td colspan="3" style="padding:0 1pt"></td><td colspan="9" style="padding:1.5pt 1pt;text-align:center;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:700;line-height:100%">Nine Months Ended September 30,</span></td></tr><tr><td colspan="3" style="padding:0 1pt"></td><td colspan="3" style="padding:1.5pt 1pt;text-align:center;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:700;line-height:100%">2026</span></td><td colspan="3" style="padding:0 1pt"></td><td colspan="3" style="padding:1.5pt 1pt;text-align:center;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:700;line-height:100%">2025</span></td><td colspan="3" style="padding:0 1pt"></td><td colspan="3" style="padding:1.5pt 1pt;text-align:center;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:700;line-height:100%">2026</span></td><td colspan="3" style="padding:0 1pt"></td><td colspan="3" style="padding:1.5pt 1pt;text-align:center;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:700;line-height:100%">2025</span></td></tr><tr><td colspan="3" style="background-color:#cceeff;padding:1.5pt 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:700;line-height:100%">Non-member electric sales:</span></td><td colspan="3" style="background-color:#cceeff;border-top:1pt solid #000000;padding:0 1pt"></td><td colspan="3" style="background-color:#cceeff;padding:0 1pt"></td><td colspan="3" style="background-color:#cceeff;border-top:1pt solid #000000;padding:0 1pt"></td><td colspan="3" style="background-color:#cceeff;padding:0 1pt"></td><td colspan="3" style="background-color:#cceeff;border-top:1pt solid #000000;padding:0 1pt"></td><td colspan="3" style="background-color:#cceeff;padding:0 1pt"></td><td colspan="3" style="background-color:#cceeff;border-top:1pt solid #000000;padding:0 1pt"></td></tr><tr><td colspan="3" style="background-color:#ffffff;padding:1.5pt 1pt 1.5pt 12.25pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">Long-term contracts</span></td><td style="background-color:#ffffff;padding:1.5pt 0 1.5pt 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">$</span></td><td style="background-color:#ffffff;padding:1.5pt 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">44,766 </span></td><td style="background-color:#ffffff;padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"></td><td colspan="3" style="background-color:#ffffff;padding:0 1pt"></td><td style="background-color:#ffffff;padding:1.5pt 0 1.5pt 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">$</span></td><td style="background-color:#ffffff;padding:1.5pt 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">39,011 </span></td><td style="background-color:#ffffff;padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"></td><td colspan="3" style="background-color:#ffffff;padding:0 1pt"></td><td style="background-color:#ffffff;padding:1.5pt 0 1.5pt 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">$</span></td><td style="background-color:#ffffff;padding:1.5pt 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">136,900 </span></td><td style="background-color:#ffffff;padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"></td><td colspan="3" style="background-color:#ffffff;padding:0 1pt"></td><td style="background-color:#ffffff;padding:1.5pt 0 1.5pt 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">$</span></td><td style="background-color:#ffffff;padding:1.5pt 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">114,284 </span></td><td style="background-color:#ffffff;padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"></td></tr><tr><td colspan="3" style="background-color:#cceeff;padding:1.5pt 1pt 1.5pt 12.25pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">Short-term contracts</span></td><td colspan="2" style="background-color:#cceeff;padding:1.5pt 0 1.5pt 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">47,787 </span></td><td style="background-color:#cceeff;padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"></td><td colspan="3" style="background-color:#cceeff;padding:0 1pt"></td><td colspan="2" style="background-color:#cceeff;padding:1.5pt 0 1.5pt 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">15,478 </span></td><td style="background-color:#cceeff;padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"></td><td colspan="3" style="background-color:#cceeff;padding:0 1pt"></td><td colspan="2" style="background-color:#cceeff;padding:1.5pt 0 1.5pt 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">67,820 </span></td><td style="background-color:#cceeff;padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"></td><td colspan="3" style="background-color:#cceeff;padding:0 1pt"></td><td colspan="2" style="background-color:#cceeff;padding:1.5pt 0 1.5pt 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">33,108 </span></td><td style="background-color:#cceeff;padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"></td></tr><tr><td colspan="3" style="background-color:#ffffff;padding:1.5pt 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">Rate stabilization</span></td><td colspan="2" style="background-color:#ffffff;padding:1.5pt 0 1.5pt 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">16,491 </span></td><td style="background-color:#ffffff;padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"></td><td colspan="3" style="background-color:#ffffff;padding:0 1pt"></td><td colspan="2" style="background-color:#ffffff;padding:1.5pt 0 1.5pt 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">57,343 </span></td><td style="background-color:#ffffff;padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"></td><td colspan="3" style="background-color:#ffffff;padding:0 1pt"></td><td colspan="2" style="background-color:#ffffff;padding:1.5pt 0 1.5pt 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">50,700 </span></td><td style="background-color:#ffffff;padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"></td><td colspan="3" style="background-color:#ffffff;padding:0 1pt"></td><td colspan="2" style="background-color:#ffffff;padding:1.5pt 0 1.5pt 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">145,469 </span></td><td style="background-color:#ffffff;padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"></td></tr><tr><td colspan="3" style="background-color:#cceeff;padding:1.5pt 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">Provision for rate refunds</span></td><td colspan="2" style="background-color:#cceeff;padding:1.5pt 0 1.5pt 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">(28,320)</span></td><td style="background-color:#cceeff;padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"></td><td colspan="3" style="background-color:#cceeff;padding:0 1pt"></td><td colspan="2" style="background-color:#cceeff;padding:1.5pt 0 1.5pt 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">— </span></td><td style="background-color:#cceeff;padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"></td><td colspan="3" style="background-color:#cceeff;padding:0 1pt"></td><td colspan="2" style="background-color:#cceeff;padding:1.5pt 0 1.5pt 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">(39,893)</span></td><td style="background-color:#cceeff;padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"></td><td colspan="3" style="background-color:#cceeff;padding:0 1pt"></td><td colspan="2" style="background-color:#cceeff;padding:1.5pt 0 1.5pt 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">2,719 </span></td><td style="background-color:#cceeff;padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"></td></tr><tr><td colspan="3" style="background-color:#ffffff;padding:1.5pt 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">Transmission revenue</span></td><td colspan="2" style="background-color:#ffffff;padding:1.5pt 0 1.5pt 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">51,633 </span></td><td style="background-color:#ffffff;padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"></td><td colspan="3" style="background-color:#ffffff;padding:0 1pt"></td><td colspan="2" style="background-color:#ffffff;padding:1.5pt 0 1.5pt 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">25,771 </span></td><td style="background-color:#ffffff;padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"></td><td colspan="3" style="background-color:#ffffff;padding:0 1pt"></td><td colspan="2" style="background-color:#ffffff;padding:1.5pt 0 1.5pt 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">128,746 </span></td><td style="background-color:#ffffff;padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"></td><td colspan="3" style="background-color:#ffffff;padding:0 1pt"></td><td colspan="2" style="background-color:#ffffff;padding:1.5pt 0 1.5pt 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">60,769 </span></td><td style="background-color:#ffffff;padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"></td></tr><tr><td colspan="3" style="background-color:#cceeff;padding:1.5pt 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">Lease revenue</span></td><td colspan="2" style="background-color:#cceeff;padding:1.5pt 0 1.5pt 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">12,602 </span></td><td style="background-color:#cceeff;padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"></td><td colspan="3" style="background-color:#cceeff;padding:0 1pt"></td><td colspan="2" style="background-color:#cceeff;padding:1.5pt 0 1.5pt 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">7,771 </span></td><td style="background-color:#cceeff;padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"></td><td colspan="3" style="background-color:#cceeff;padding:0 1pt"></td><td colspan="2" style="background-color:#cceeff;padding:1.5pt 0 1.5pt 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">36,529 </span></td><td style="background-color:#cceeff;padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"></td><td colspan="3" style="background-color:#cceeff;padding:0 1pt"></td><td colspan="2" style="background-color:#cceeff;padding:1.5pt 0 1.5pt 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">22,329 </span></td><td style="background-color:#cceeff;padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"></td></tr><tr><td colspan="3" style="background-color:#ffffff;padding:1.5pt 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">Coal sales</span></td><td colspan="2" style="background-color:#ffffff;padding:1.5pt 0 1.5pt 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">— </span></td><td style="background-color:#ffffff;padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"></td><td colspan="3" style="background-color:#ffffff;padding:0 1pt"></td><td colspan="2" style="background-color:#ffffff;padding:1.5pt 0 1.5pt 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">1,249 </span></td><td style="background-color:#ffffff;padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"></td><td colspan="3" style="background-color:#ffffff;padding:0 1pt"></td><td colspan="2" style="background-color:#ffffff;padding:1.5pt 0 1.5pt 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">— </span></td><td style="background-color:#ffffff;padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"></td><td colspan="3" style="background-color:#ffffff;padding:0 1pt"></td><td colspan="2" style="background-color:#ffffff;padding:1.5pt 0 1.5pt 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">13,714 </span></td><td style="background-color:#ffffff;padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"></td></tr><tr><td colspan="3" style="background-color:#cceeff;padding:1.5pt 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">Other</span></td><td colspan="2" style="background-color:#cceeff;padding:1.5pt 0 1.5pt 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">1,028 </span></td><td style="background-color:#cceeff;padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"></td><td colspan="3" style="background-color:#cceeff;padding:0 1pt"></td><td colspan="2" style="background-color:#cceeff;padding:1.5pt 0 1.5pt 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">5,115 </span></td><td style="background-color:#cceeff;padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"></td><td colspan="3" style="background-color:#cceeff;padding:0 1pt"></td><td colspan="2" style="background-color:#cceeff;padding:1.5pt 0 1.5pt 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">5,253 </span></td><td style="background-color:#cceeff;padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"></td><td colspan="3" style="background-color:#cceeff;padding:0 1pt"></td><td colspan="2" style="background-color:#cceeff;padding:1.5pt 0 1.5pt 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">11,024 </span></td><td style="background-color:#cceeff;padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"></td></tr><tr><td colspan="3" style="background-color:#ffffff;padding:1.5pt 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:700;line-height:100%">Total non-member electric sales and other operating revenue</span></td><td style="background-color:#ffffff;border-bottom:3pt double #000000;border-top:1pt solid #000000;padding:1.5pt 0 1.5pt 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:700;line-height:100%">$</span></td><td style="background-color:#ffffff;border-bottom:3pt double #000000;border-top:1pt solid #000000;padding:1.5pt 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:700;line-height:100%">145,987</span><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%"> </span></td><td style="background-color:#ffffff;border-bottom:3pt double #000000;border-top:1pt solid #000000;padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"></td><td colspan="3" style="background-color:#ffffff;padding:0 1pt"></td><td style="background-color:#ffffff;border-bottom:3pt double #000000;border-top:1pt solid #000000;padding:1.5pt 0 1.5pt 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:700;line-height:100%">$</span></td><td style="background-color:#ffffff;border-bottom:3pt double #000000;border-top:1pt solid #000000;padding:1.5pt 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:700;line-height:100%">151,738</span><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%"> </span></td><td style="background-color:#ffffff;border-bottom:3pt double #000000;border-top:1pt solid #000000;padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"></td><td colspan="3" style="background-color:#ffffff;padding:0 1pt"></td><td style="background-color:#ffffff;border-bottom:3pt double #000000;border-top:1pt solid #000000;padding:1.5pt 0 1.5pt 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:700;line-height:100%">$</span></td><td style="background-color:#ffffff;border-bottom:3pt double #000000;border-top:1pt solid #000000;padding:1.5pt 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:700;line-height:100%">386,055</span><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%"> </span></td><td style="background-color:#ffffff;border-bottom:3pt double #000000;border-top:1pt solid #000000;padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"></td><td colspan="3" style="background-color:#ffffff;padding:0 1pt"></td><td style="background-color:#ffffff;border-bottom:3pt double #000000;border-top:1pt solid #000000;padding:1.5pt 0 1.5pt 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:700;line-height:100%">$</span></td><td style="background-color:#ffffff;border-bottom:3pt double #000000;border-top:1pt solid #000000;padding:1.5pt 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:700;line-height:100%">403,416</span><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%"> </span></td><td style="background-color:#ffffff;border-bottom:3pt double #000000;border-top:1pt solid #000000;padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"></td></tr></table></div><div style="margin-top:10pt;padding-left:18pt"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-style:italic;font-weight:400;line-height:120%">Non-member electric sales</span></div><div style="margin-top:10pt;text-indent:36pt"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%">Revenues from wholesale power sales to non-members are primarily from long-term contracts and short-term market sales. Prior to Tri-State's customers’ demand for energy, Tri-State does not have a contractual right to consideration as it is not obligated to provide energy until the customer demands each incremental unit of energy. Tri-State transfers control of the energy to its customer over time and its customer simultaneously receives and consumes the benefits of the power. Progress toward completion of Tri-State's performance obligation is measured using the output method. Payments are received in accordance with the contract terms, which is less than 30 days after the invoice is received by the customer.</span></div><div style="margin-top:10pt;padding-left:18pt"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-style:italic;font-weight:400;line-height:120%">Rate Stabilization</span></div><div style="margin-top:10pt;text-indent:36pt"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%">Rate stabilization represents revenue recognition from withdrawal of former Utility Members from membership in Tri-State that was previously deferred in accordance with accounting requirements related to regulated operations. Tri-State recognized $50.7 million of deferred membership withdrawal income for the nine months ended September 30, 2026 compared to $145.5 million of deferred membership withdrawal income being recognized for the nine months ended September 30, 2025.</span></div><div style="margin-top:10pt;padding-left:18pt"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-style:italic;font-weight:400;line-height:120%">Provision for Rate Refunds</span></div><div style="margin-top:10pt;text-indent:36pt"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%">Tri-State is subject to ongoing proceedings at FERC regarding the return on equity and other inputs used in transmission rates of transmission owners under the SPP's OATT related to the expansion of SPP's regional transmission organization into the Western Interconnection. FERC accepted proposed rates subject to refund and established hearing and settlement procedures. These settlement discussions are ongoing and the matter has not been fully resolved. Pending the ultimate outcome of settlement discussions, Tri-State has recorded an estimated provision for rate refund for such amounts that are subject to refund to transmission customers. </span></div><div style="margin-top:10pt;padding-left:18pt"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-style:italic;font-weight:400;line-height:120%">Lease Revenue</span></div><div style="margin-top:10pt;text-indent:36pt"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%">Lease revenue is from lease agreements where Tri-State is the lessor primarily for certain generation facilities with third parties. Tri-State has tolling agreements with third parties for certain combustion turbine units at Knutson, Pyramid and Limon Generating Stations that were determined to be leases as the third parties have the right to the economic benefits of applicable unit and the third parties control the use of such unit by its contractual rights, including the ability to direct the timing of dispatch of energy. See Note 15 - Leases.</span></div><div style="margin-top:10pt;padding-left:18pt"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-style:italic;font-weight:400;line-height:120%">Transmission revenue</span></div><div style="margin-top:10pt;text-indent:36pt"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%">Transmission revenue is received for reservation of capacity or transmission of electricity over Tri-State's transmission facilities, including revenue from SPP related to Tri-State's transmission facilities. Each of these services are provided over time and progress toward completion of Tri-State's performance obligations is measured using the output method. </span></div><div style="margin-top:10pt;padding-left:18pt"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-style:italic;font-weight:400;line-height:120%">Other operating revenue</span></div>Other operating revenue includes income from various dark fiber agreements that Tri-State has with third parties for the use of certain of Tri-State's telecommunication assets and sales of excess intangible assets. The following revenue is reflected on Tri-State's consolidated statements of operations as follows (dollars in thousands):<div style="margin-top:5pt"><table style="border-collapse:collapse;display:inline-table;margin-bottom:5pt;vertical-align:text-bottom;width:100.000%"><tr><td style="width:1.0%"></td><td style="width:45.537%"></td><td style="width:0.1%"></td><td style="width:1.0%"></td><td style="width:11.911%"></td><td style="width:0.1%"></td><td style="width:0.1%"></td><td style="width:0.530%"></td><td style="width:0.1%"></td><td style="width:1.0%"></td><td style="width:11.911%"></td><td style="width:0.1%"></td><td style="width:0.1%"></td><td style="width:0.530%"></td><td style="width:0.1%"></td><td style="width:1.0%"></td><td style="width:10.595%"></td><td style="width:0.1%"></td><td style="width:0.1%"></td><td style="width:0.530%"></td><td style="width:0.1%"></td><td style="width:1.0%"></td><td style="width:12.356%"></td><td style="width:0.1%"></td></tr><tr><td colspan="3" style="padding:0 1pt"></td><td colspan="9" style="padding:1.5pt 1pt;text-align:center;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:700;line-height:100%">Three Months Ended September 30,</span></td><td colspan="3" style="padding:0 1pt"></td><td colspan="9" style="padding:1.5pt 1pt;text-align:center;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:700;line-height:100%">Nine Months Ended September 30,</span></td></tr><tr><td colspan="3" style="padding:0 1pt"></td><td colspan="3" style="padding:1.5pt 1pt;text-align:center;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:700;line-height:100%">2026</span></td><td colspan="3" style="padding:0 1pt"></td><td colspan="3" style="padding:1.5pt 1pt;text-align:center;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:700;line-height:100%">2025</span></td><td colspan="3" style="padding:0 1pt"></td><td colspan="3" style="padding:1.5pt 1pt;text-align:center;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:700;line-height:100%">2026</span></td><td colspan="3" style="padding:0 1pt"></td><td colspan="3" style="padding:1.5pt 1pt;text-align:center;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:700;line-height:100%">2025</span></td></tr><tr><td colspan="3" style="background-color:#cceeff;padding:1.5pt 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:700;line-height:100%">Non-member electric sales:</span></td><td colspan="3" style="background-color:#cceeff;border-top:1pt solid #000000;padding:0 1pt"></td><td colspan="3" style="background-color:#cceeff;padding:0 1pt"></td><td colspan="3" style="background-color:#cceeff;border-top:1pt solid #000000;padding:0 1pt"></td><td colspan="3" style="background-color:#cceeff;padding:0 1pt"></td><td colspan="3" style="background-color:#cceeff;border-top:1pt solid #000000;padding:0 1pt"></td><td colspan="3" style="background-color:#cceeff;padding:0 1pt"></td><td colspan="3" style="background-color:#cceeff;border-top:1pt solid #000000;padding:0 1pt"></td></tr><tr><td colspan="3" style="background-color:#ffffff;padding:1.5pt 1pt 1.5pt 12.25pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">Long-term contracts</span></td><td style="background-color:#ffffff;padding:1.5pt 0 1.5pt 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">$</span></td><td style="background-color:#ffffff;padding:1.5pt 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">44,766 </span></td><td style="background-color:#ffffff;padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"></td><td colspan="3" style="background-color:#ffffff;padding:0 1pt"></td><td style="background-color:#ffffff;padding:1.5pt 0 1.5pt 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">$</span></td><td style="background-color:#ffffff;padding:1.5pt 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">39,011 </span></td><td style="background-color:#ffffff;padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"></td><td colspan="3" style="background-color:#ffffff;padding:0 1pt"></td><td style="background-color:#ffffff;padding:1.5pt 0 1.5pt 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">$</span></td><td style="background-color:#ffffff;padding:1.5pt 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">136,900 </span></td><td style="background-color:#ffffff;padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"></td><td colspan="3" style="background-color:#ffffff;padding:0 1pt"></td><td style="background-color:#ffffff;padding:1.5pt 0 1.5pt 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">$</span></td><td style="background-color:#ffffff;padding:1.5pt 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">114,284 </span></td><td style="background-color:#ffffff;padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"></td></tr><tr><td colspan="3" style="background-color:#cceeff;padding:1.5pt 1pt 1.5pt 12.25pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">Short-term contracts</span></td><td colspan="2" style="background-color:#cceeff;padding:1.5pt 0 1.5pt 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">47,787 </span></td><td style="background-color:#cceeff;padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"></td><td colspan="3" style="background-color:#cceeff;padding:0 1pt"></td><td colspan="2" style="background-color:#cceeff;padding:1.5pt 0 1.5pt 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">15,478 </span></td><td style="background-color:#cceeff;padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"></td><td colspan="3" style="background-color:#cceeff;padding:0 1pt"></td><td colspan="2" style="background-color:#cceeff;padding:1.5pt 0 1.5pt 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">67,820 </span></td><td style="background-color:#cceeff;padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"></td><td colspan="3" style="background-color:#cceeff;padding:0 1pt"></td><td colspan="2" style="background-color:#cceeff;padding:1.5pt 0 1.5pt 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">33,108 </span></td><td style="background-color:#cceeff;padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"></td></tr><tr><td colspan="3" style="background-color:#ffffff;padding:1.5pt 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">Rate stabilization</span></td><td colspan="2" style="background-color:#ffffff;padding:1.5pt 0 1.5pt 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">16,491 </span></td><td style="background-color:#ffffff;padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"></td><td colspan="3" style="background-color:#ffffff;padding:0 1pt"></td><td colspan="2" style="background-color:#ffffff;padding:1.5pt 0 1.5pt 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">57,343 </span></td><td style="background-color:#ffffff;padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"></td><td colspan="3" style="background-color:#ffffff;padding:0 1pt"></td><td colspan="2" style="background-color:#ffffff;padding:1.5pt 0 1.5pt 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">50,700 </span></td><td style="background-color:#ffffff;padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"></td><td colspan="3" style="background-color:#ffffff;padding:0 1pt"></td><td colspan="2" style="background-color:#ffffff;padding:1.5pt 0 1.5pt 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">145,469 </span></td><td style="background-color:#ffffff;padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"></td></tr><tr><td colspan="3" style="background-color:#cceeff;padding:1.5pt 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">Provision for rate refunds</span></td><td colspan="2" style="background-color:#cceeff;padding:1.5pt 0 1.5pt 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">(28,320)</span></td><td style="background-color:#cceeff;padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"></td><td colspan="3" style="background-color:#cceeff;padding:0 1pt"></td><td colspan="2" style="background-color:#cceeff;padding:1.5pt 0 1.5pt 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">— </span></td><td style="background-color:#cceeff;padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"></td><td colspan="3" style="background-color:#cceeff;padding:0 1pt"></td><td colspan="2" style="background-color:#cceeff;padding:1.5pt 0 1.5pt 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">(39,893)</span></td><td style="background-color:#cceeff;padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"></td><td colspan="3" style="background-color:#cceeff;padding:0 1pt"></td><td colspan="2" style="background-color:#cceeff;padding:1.5pt 0 1.5pt 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">2,719 </span></td><td style="background-color:#cceeff;padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"></td></tr><tr><td colspan="3" style="background-color:#ffffff;padding:1.5pt 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">Transmission revenue</span></td><td colspan="2" style="background-color:#ffffff;padding:1.5pt 0 1.5pt 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">51,633 </span></td><td style="background-color:#ffffff;padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"></td><td colspan="3" style="background-color:#ffffff;padding:0 1pt"></td><td colspan="2" style="background-color:#ffffff;padding:1.5pt 0 1.5pt 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">25,771 </span></td><td style="background-color:#ffffff;padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"></td><td colspan="3" style="background-color:#ffffff;padding:0 1pt"></td><td colspan="2" style="background-color:#ffffff;padding:1.5pt 0 1.5pt 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">128,746 </span></td><td style="background-color:#ffffff;padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"></td><td colspan="3" style="background-color:#ffffff;padding:0 1pt"></td><td colspan="2" style="background-color:#ffffff;padding:1.5pt 0 1.5pt 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">60,769 </span></td><td style="background-color:#ffffff;padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"></td></tr><tr><td colspan="3" style="background-color:#cceeff;padding:1.5pt 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">Lease revenue</span></td><td colspan="2" style="background-color:#cceeff;padding:1.5pt 0 1.5pt 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">12,602 </span></td><td style="background-color:#cceeff;padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"></td><td colspan="3" style="background-color:#cceeff;padding:0 1pt"></td><td colspan="2" style="background-color:#cceeff;padding:1.5pt 0 1.5pt 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">7,771 </span></td><td style="background-color:#cceeff;padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"></td><td colspan="3" style="background-color:#cceeff;padding:0 1pt"></td><td colspan="2" style="background-color:#cceeff;padding:1.5pt 0 1.5pt 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">36,529 </span></td><td style="background-color:#cceeff;padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"></td><td colspan="3" style="background-color:#cceeff;padding:0 1pt"></td><td colspan="2" style="background-color:#cceeff;padding:1.5pt 0 1.5pt 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">22,329 </span></td><td style="background-color:#cceeff;padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"></td></tr><tr><td colspan="3" style="background-color:#ffffff;padding:1.5pt 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">Coal sales</span></td><td colspan="2" style="background-color:#ffffff;padding:1.5pt 0 1.5pt 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">— </span></td><td style="background-color:#ffffff;padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"></td><td colspan="3" style="background-color:#ffffff;padding:0 1pt"></td><td colspan="2" style="background-color:#ffffff;padding:1.5pt 0 1.5pt 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">1,249 </span></td><td style="background-color:#ffffff;padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"></td><td colspan="3" style="background-color:#ffffff;padding:0 1pt"></td><td colspan="2" style="background-color:#ffffff;padding:1.5pt 0 1.5pt 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">— </span></td><td style="background-color:#ffffff;padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"></td><td colspan="3" style="background-color:#ffffff;padding:0 1pt"></td><td colspan="2" style="background-color:#ffffff;padding:1.5pt 0 1.5pt 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">13,714 </span></td><td style="background-color:#ffffff;padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"></td></tr><tr><td colspan="3" style="background-color:#cceeff;padding:1.5pt 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">Other</span></td><td colspan="2" style="background-color:#cceeff;padding:1.5pt 0 1.5pt 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">1,028 </span></td><td style="background-color:#cceeff;padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"></td><td colspan="3" style="background-color:#cceeff;padding:0 1pt"></td><td colspan="2" style="background-color:#cceeff;padding:1.5pt 0 1.5pt 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">5,115 </span></td><td style="background-color:#cceeff;padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"></td><td colspan="3" style="background-color:#cceeff;padding:0 1pt"></td><td colspan="2" style="background-color:#cceeff;padding:1.5pt 0 1.5pt 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">5,253 </span></td><td style="background-color:#cceeff;padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"></td><td colspan="3" style="background-color:#cceeff;padding:0 1pt"></td><td colspan="2" style="background-color:#cceeff;padding:1.5pt 0 1.5pt 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">11,024 </span></td><td style="background-color:#cceeff;padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"></td></tr><tr><td colspan="3" style="background-color:#ffffff;padding:1.5pt 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:700;line-height:100%">Total non-member electric sales and other operating revenue</span></td><td style="background-color:#ffffff;border-bottom:3pt double #000000;border-top:1pt solid #000000;padding:1.5pt 0 1.5pt 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:700;line-height:100%">$</span></td><td style="background-color:#ffffff;border-bottom:3pt double #000000;border-top:1pt solid #000000;padding:1.5pt 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:700;line-height:100%">145,987</span><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%"> </span></td><td style="background-color:#ffffff;border-bottom:3pt double #000000;border-top:1pt solid #000000;padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"></td><td colspan="3" style="background-color:#ffffff;padding:0 1pt"></td><td style="background-color:#ffffff;border-bottom:3pt double #000000;border-top:1pt solid #000000;padding:1.5pt 0 1.5pt 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:700;line-height:100%">$</span></td><td style="background-color:#ffffff;border-bottom:3pt double #000000;border-top:1pt solid #000000;padding:1.5pt 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:700;line-height:100%">151,738</span><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%"> </span></td><td style="background-color:#ffffff;border-bottom:3pt double #000000;border-top:1pt solid #000000;padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"></td><td colspan="3" style="background-color:#ffffff;padding:0 1pt"></td><td style="background-color:#ffffff;border-bottom:3pt double #000000;border-top:1pt solid #000000;padding:1.5pt 0 1.5pt 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:700;line-height:100%">$</span></td><td style="background-color:#ffffff;border-bottom:3pt double #000000;border-top:1pt solid #000000;padding:1.5pt 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:700;line-height:100%">386,055</span><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%"> </span></td><td style="background-color:#ffffff;border-bottom:3pt double #000000;border-top:1pt solid #000000;padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"></td><td colspan="3" style="background-color:#ffffff;padding:0 1pt"></td><td style="background-color:#ffffff;border-bottom:3pt double #000000;border-top:1pt solid #000000;padding:1.5pt 0 1.5pt 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:700;line-height:100%">$</span></td><td style="background-color:#ffffff;border-bottom:3pt double #000000;border-top:1pt solid #000000;padding:1.5pt 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:700;line-height:100%">403,416</span><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%"> </span></td><td style="background-color:#ffffff;border-bottom:3pt double #000000;border-top:1pt solid #000000;padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"></td></tr></table></div> 44766000 39011000 136900000 114284000 47787000 15478000 67820000 33108000 16491000 57343000 50700000 145469000 -28320000 0 -39893000 2719000 51633000 25771000 128746000 60769000 12602000 7771000 36529000 22329000 0 1249000 0 13714000 1028000 5115000 5253000 11024000 145987000 151738000 386055000 403416000 50700000 145500000 INCOME TAXES<div style="margin-top:10pt;text-indent:36pt"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%">Tri-State is a taxable cooperative subject to federal and state taxation. As a taxable electric cooperative, Tri-State is allowed a tax exclusion for margins allocated as patronage capital. Tri-State utilizes the liability method of accounting for income taxes which requires that deferred tax assets and liabilities be determined based on the expected future income tax consequences of events that have been recognized in the consolidated financial statements. Tri-State and its subsidiaries use the flow-through method for recognizing deferred income taxes whereby changes in deferred tax assets or liabilities result in the establishment of a regulatory asset or liability, as approved by Tri-State's Board and FERC. A regulatory asset or liability associated with deferred income taxes generally represents the future increase or decrease in income taxes payable that will be settled or received through future rate revenues. Under this regulatory accounting approach, any income tax expense or benefit on Tri-State's consolidated statements of operation includes only the current portion.</span></div><div style="margin-top:10pt;text-indent:36pt"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%">Under ASC 740-270, Tri-State calculates an estimate of the provision for income taxes during interim reporting periods by applying an estimate of the annual effective tax rate for the full fiscal year to income or loss (pretax income or loss excluding unusual or infrequently occurring discrete items) for the reporting period, after regulatory affect. Tri-State's consolidated statements of operations included no income tax expense or benefit for the nine months ended September 30, 2026 and $0.2 million of current income tax expense for the comparable period in 2025. Tri-State is continuing to evaluate the tax impacts of the contract termination payment received in 2026 from a former Utility Member. Any current tax expense expected to be realized as a result of the contract termination payment, if any, will be recorded in the fourth quarter of 2026 when the amount of deferred revenue recognized will be known.</span></div> 0 200000 LEASES<div style="margin-top:10pt;padding-left:18pt"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-style:italic;font-weight:400;line-height:120%">Leasing Arrangements as Lessee</span></div><div style="margin-top:10pt;text-indent:36pt"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%">Tri-State determines if an arrangement is a lease upon commencement of the contract. If an arrangement is determined to be a long-term lease (greater than 12 months), Tri-State recognizes a right-of-use asset and lease liability based on the present value of the future minimum lease payments over the lease term at the commencement date. As most of Tri-State's leases do not provide an implicit rate, it uses its incremental borrowing rate based on the information available at commencement date in determining the present value of future payments. Tri-State's lease terms may also include options to extend or terminate the lease when it is reasonably certain that those options will be exercised. Lease expense for minimum lease payments is recognized on a straight-line basis over the lease term. Right-of-use assets are included in other deferred charges, the current portion of lease liabilities is included in accrued expenses and the long-term portion of lease liabilities is included in other deferred credits and other liabilities on Tri-State's consolidated statements of financial position.</span></div><div style="margin-top:10pt;text-indent:36pt"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%">Tri-State has elected to apply the short-term lease exception for contracts that have a lease term of twelve months or less and do not include an option to purchase the underlying asset. Therefore, Tri-State does not recognize a right-of-use asset or lease liability for such contracts. Tri-State recognizes short-term lease payments as expense on a straight-line basis over the lease term. Variable lease payments that do not depend on an index or rate are recognized as expense.</span></div><div style="margin-top:10pt;text-indent:36pt"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:700;line-height:120%">Operating Leases</span></div><div style="margin-top:10pt;text-indent:36pt"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%">Tri-State has lease agreements as lessee for the right to use various facilities and operational assets. Rent expense for all short-term and long-term operating leases was $0.6 million for the three months ended September 30, 2026 and $1.1 million for the comparable period in 2025. Rent expense for all short-term and long-term operating leases was $2.0 million for the nine months ended September 30, 2026 and $3.5 million for the comparable period in 2025. Rent expense is included in various categories of operating expenses on Tri-State's consolidated statements of operations based on the type and purpose of the lease. </span></div><div style="margin-top:10pt;text-indent:36pt"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%">Tri-State's consolidated statements of financial position include the following lease components (dollars in thousands):</span><table style="border-collapse:collapse;display:inline-table;margin-bottom:5pt;vertical-align:text-bottom;width:100.000%"><tr><td style="width:1.0%"></td><td style="width:64.543%"></td><td style="width:0.1%"></td><td style="width:1.0%"></td><td style="width:15.712%"></td><td style="width:0.1%"></td><td style="width:0.1%"></td><td style="width:0.530%"></td><td style="width:0.1%"></td><td style="width:1.0%"></td><td style="width:15.715%"></td><td style="width:0.1%"></td></tr><tr><td colspan="3" style="padding:0 1pt"></td><td colspan="3" style="padding:1.5pt 1pt;text-align:center;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:700;line-height:100%">September 30,<br/>2026</span></td><td colspan="3" style="padding:0 1pt"></td><td colspan="3" style="padding:1.5pt 1pt;text-align:center;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:700;line-height:100%">December 31,<br/>2025</span></td></tr><tr><td colspan="3" style="background-color:#cceeff;padding:1.5pt 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:700;line-height:100%">Operating leases:</span></td><td colspan="3" style="background-color:#cceeff;border-top:1pt solid #000000;padding:0 1pt"></td><td colspan="3" style="background-color:#cceeff;padding:0 1pt"></td><td colspan="3" style="background-color:#cceeff;border-top:1pt solid #000000;padding:0 1pt"></td></tr><tr><td colspan="3" style="padding:1.5pt 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%"><span style="-sec-ix-hidden:f-790"><span style="-sec-ix-hidden:f-791">Operating lease right-of-use assets</span></span></span></td><td style="padding:1.5pt 0 1.5pt 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">$</span></td><td style="padding:1.5pt 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">14,119 </span></td><td style="padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"></td><td colspan="3" style="padding:0 1pt"></td><td style="padding:1.5pt 0 1.5pt 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">$</span></td><td style="padding:1.5pt 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">13,807 </span></td><td style="padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"></td></tr><tr><td colspan="3" style="background-color:#cceeff;padding:1.5pt 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">Less: Accumulated amortization</span></td><td colspan="2" style="background-color:#cceeff;padding:1.5pt 0 1.5pt 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">(3,714)</span></td><td style="background-color:#cceeff;padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"></td><td colspan="3" style="background-color:#cceeff;padding:0 1pt"></td><td colspan="2" style="background-color:#cceeff;padding:1.5pt 0 1.5pt 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">(2,874)</span></td><td style="background-color:#cceeff;padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"></td></tr><tr><td colspan="3" style="padding:1.5pt 1pt 1.5pt 7.75pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:700;line-height:100%">Net operating lease right-of-use assets</span></td><td style="border-top:1pt solid #000000;padding:1.5pt 0 1.5pt 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:700;line-height:100%">$</span></td><td style="border-top:1pt solid #000000;padding:1.5pt 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:700;line-height:100%">10,405</span><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%"> </span></td><td style="border-top:1pt solid #000000;padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"></td><td colspan="3" style="padding:0 1pt"></td><td style="border-top:1pt solid #000000;padding:1.5pt 0 1.5pt 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:700;line-height:100%">$</span></td><td style="border-top:1pt solid #000000;padding:1.5pt 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:700;line-height:100%">10,933</span><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%"> </span></td><td style="border-top:1pt solid #000000;padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"></td></tr><tr style="height:14pt"><td colspan="3" style="background-color:#cceeff;padding:0 1pt"></td><td colspan="3" style="background-color:#cceeff;border-top:3pt double #000000;padding:0 1pt"></td><td colspan="3" style="background-color:#cceeff;padding:0 1pt"></td><td colspan="3" style="background-color:#cceeff;border-top:3pt double #000000;padding:0 1pt"></td></tr><tr><td colspan="3" style="padding:1.5pt 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%"><span style="-sec-ix-hidden:f-798"><span style="-sec-ix-hidden:f-799">Operating lease liabilities - current</span></span></span></td><td style="padding:1.5pt 0 1.5pt 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">$</span></td><td style="padding:1.5pt 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">(951)</span></td><td style="padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"></td><td colspan="3" style="padding:0 1pt"></td><td style="padding:1.5pt 0 1.5pt 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">$</span></td><td style="padding:1.5pt 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">(803)</span></td><td style="padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"></td></tr><tr><td colspan="3" style="background-color:#cceeff;padding:1.5pt 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%"><span style="-sec-ix-hidden:f-802"><span style="-sec-ix-hidden:f-803">Operating lease liabilities - noncurrent</span></span></span></td><td colspan="2" style="background-color:#cceeff;padding:1.5pt 0 1.5pt 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">(6,038)</span></td><td style="background-color:#cceeff;padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"></td><td colspan="3" style="background-color:#cceeff;padding:0 1pt"></td><td colspan="2" style="background-color:#cceeff;padding:1.5pt 0 1.5pt 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">(6,473)</span></td><td style="background-color:#cceeff;padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"></td></tr><tr><td colspan="3" style="padding:1.5pt 1pt 1.5pt 7.75pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:700;line-height:100%">Total operating lease liabilities</span></td><td style="border-top:1pt solid #000000;padding:1.5pt 0 1.5pt 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:700;line-height:100%">$</span></td><td style="border-top:1pt solid #000000;padding:1.5pt 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:700;line-height:100%">(6,989)</span></td><td style="border-top:1pt solid #000000;padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"></td><td colspan="3" style="padding:0 1pt"></td><td style="border-top:1pt solid #000000;padding:1.5pt 0 1.5pt 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:700;line-height:100%">$</span></td><td style="border-top:1pt solid #000000;padding:1.5pt 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:700;line-height:100%">(7,276)</span></td><td style="border-top:1pt solid #000000;padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"></td></tr><tr style="height:14pt"><td colspan="3" style="background-color:#cceeff;padding:0 1pt"></td><td colspan="3" style="background-color:#cceeff;border-top:3pt double #000000;padding:0 1pt"></td><td colspan="3" style="background-color:#cceeff;padding:0 1pt"></td><td colspan="3" style="background-color:#cceeff;border-top:3pt double #000000;padding:0 1pt"></td></tr><tr><td colspan="3" style="padding:1.5pt 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:700;line-height:100%">Finance leases:</span></td><td colspan="3" style="padding:0 1pt"></td><td colspan="3" style="padding:0 1pt"></td><td colspan="3" style="padding:0 1pt"></td></tr><tr><td colspan="3" style="background-color:#cceeff;padding:1.5pt 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%"><span style="-sec-ix-hidden:f-808"><span style="-sec-ix-hidden:f-809">Finance lease right-of-use assets</span></span></span></td><td style="background-color:#cceeff;padding:1.5pt 0 1.5pt 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">$</span></td><td style="background-color:#cceeff;padding:1.5pt 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">— </span></td><td style="background-color:#cceeff;padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"></td><td colspan="3" style="background-color:#cceeff;padding:0 1pt"></td><td style="background-color:#cceeff;padding:1.5pt 0 1.5pt 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">$</span></td><td style="background-color:#cceeff;padding:1.5pt 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">95 </span></td><td style="background-color:#cceeff;padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"></td></tr><tr><td colspan="3" style="padding:1.5pt 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">Less: Accumulated amortization</span></td><td colspan="2" style="padding:1.5pt 0 1.5pt 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">— </span></td><td style="padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"></td><td colspan="3" style="padding:0 1pt"></td><td colspan="2" style="padding:1.5pt 0 1.5pt 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">(73)</span></td><td style="padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"></td></tr><tr><td colspan="3" style="background-color:#cceeff;padding:1.5pt 1pt 1.5pt 7.75pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:700;line-height:100%">Net finance lease right-of-use assets</span></td><td style="background-color:#cceeff;border-top:1pt solid #000;padding:1.5pt 0 1.5pt 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">$</span></td><td style="background-color:#cceeff;border-top:1pt solid #000;padding:1.5pt 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">— </span></td><td style="background-color:#cceeff;border-top:1pt solid #000;padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"></td><td colspan="3" style="background-color:#cceeff;padding:0 1pt"></td><td style="background-color:#cceeff;border-top:1pt solid #000;padding:1.5pt 0 1.5pt 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">$</span></td><td style="background-color:#cceeff;border-top:1pt solid #000;padding:1.5pt 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">22 </span></td><td style="background-color:#cceeff;border-top:1pt solid #000;padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"></td></tr><tr style="height:14pt"><td colspan="3" style="padding:0 1pt"></td><td colspan="3" style="border-top:3pt double #000;padding:0 1pt"></td><td colspan="3" style="padding:0 1pt"></td><td colspan="3" style="border-top:3pt double #000;padding:0 1pt"></td></tr><tr><td colspan="3" style="background-color:#cceeff;padding:1.5pt 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%"><span style="-sec-ix-hidden:f-816"><span style="-sec-ix-hidden:f-817">Finance lease liabilities - current</span></span></span></td><td style="background-color:#cceeff;padding:1.5pt 0 1.5pt 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">$</span></td><td style="background-color:#cceeff;padding:1.5pt 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">— </span></td><td style="background-color:#cceeff;padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"></td><td colspan="3" style="background-color:#cceeff;padding:0 1pt"></td><td style="background-color:#cceeff;padding:1.5pt 0 1.5pt 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">$</span></td><td style="background-color:#cceeff;padding:1.5pt 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">(13)</span></td><td style="background-color:#cceeff;padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"></td></tr><tr><td colspan="3" style="padding:1.5pt 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%"><span style="-sec-ix-hidden:f-820"><span style="-sec-ix-hidden:f-821">Finance lease liabilities - noncurrent</span></span></span></td><td colspan="2" style="padding:1.5pt 0 1.5pt 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">— </span></td><td style="padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"></td><td colspan="3" style="padding:0 1pt"></td><td colspan="2" style="padding:1.5pt 0 1.5pt 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">— </span></td><td style="padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"></td></tr><tr><td colspan="3" style="background-color:#cceeff;padding:1.5pt 1pt 1.5pt 7.75pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:700;line-height:100%">Total finance lease liabilities</span></td><td style="background-color:#cceeff;border-top:1pt solid #000;padding:1.5pt 0 1.5pt 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">$</span></td><td style="background-color:#cceeff;border-top:1pt solid #000;padding:1.5pt 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">— </span></td><td style="background-color:#cceeff;border-top:1pt solid #000;padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"></td><td colspan="3" style="background-color:#cceeff;padding:0 1pt"></td><td style="background-color:#cceeff;border-top:1pt solid #000;padding:1.5pt 0 1.5pt 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">$</span></td><td style="background-color:#cceeff;border-top:1pt solid #000;padding:1.5pt 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">(13)</span></td><td style="background-color:#cceeff;border-top:1pt solid #000;padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"></td></tr><tr style="height:14pt"><td colspan="3" style="padding:0 1pt"></td><td colspan="3" style="border-top:3pt double #000;padding:0 1pt"></td><td colspan="3" style="padding:0 1pt"></td><td colspan="3" style="border-top:3pt double #000;padding:0 1pt"></td></tr><tr><td colspan="3" style="background-color:#cceeff;padding:1.5pt 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:700;line-height:100%">Lease Term and Discount Rate:</span></td><td colspan="3" style="background-color:#cceeff;padding:0 1pt"></td><td colspan="3" style="background-color:#cceeff;padding:0 1pt"></td><td colspan="3" style="background-color:#cceeff;padding:0 1pt"></td></tr><tr><td colspan="3" style="padding:1.5pt 1pt 1.5pt 7.75pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:700;line-height:100%">Weighted-average remaining lease term (in years)</span></td><td colspan="3" style="padding:0 1pt"></td><td colspan="3" style="padding:0 1pt"></td><td colspan="3" style="padding:0 1pt"></td></tr><tr><td colspan="3" style="background-color:#cceeff;padding:1.5pt 1pt 1.5pt 7.75pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">Operating leases</span></td><td colspan="3" style="background-color:#cceeff;padding:1.5pt 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">27.0</span></td><td colspan="3" style="background-color:#cceeff;padding:0 1pt"></td><td colspan="3" style="background-color:#cceeff;padding:1.5pt 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">26.9</span></td></tr><tr><td colspan="3" style="padding:1.5pt 1pt 1.5pt 7.75pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">Finance leases</span></td><td colspan="3" style="padding:1.5pt 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">0</span></td><td colspan="3" style="padding:0 1pt"></td><td colspan="3" style="padding:1.5pt 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">0.5</span></td></tr><tr><td colspan="3" style="background-color:#cceeff;padding:1.5pt 1pt 1.5pt 7.75pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:700;line-height:100%">Weighted-average discount rate</span></td><td colspan="3" style="background-color:#cceeff;padding:0 1pt"></td><td colspan="3" style="background-color:#cceeff;padding:0 1pt"></td><td colspan="3" style="background-color:#cceeff;padding:0 1pt"></td></tr><tr><td colspan="3" style="padding:1.5pt 1pt 1.5pt 7.75pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">Operating leases</span></td><td colspan="2" style="padding:1.5pt 0 1.5pt 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">6.83 </span></td><td style="padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">%</span></td><td colspan="3" style="padding:0 1pt"></td><td colspan="2" style="padding:1.5pt 0 1.5pt 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">6.82 </span></td><td style="padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">%</span></td></tr><tr><td colspan="3" style="background-color:#cceeff;padding:1.5pt 1pt 1.5pt 7.75pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">Finance leases</span></td><td colspan="2" style="background-color:#cceeff;padding:1.5pt 0 1.5pt 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">—%</span></td><td style="background-color:#cceeff;padding:1.5pt 1pt 1.5pt 0;text-align:left;vertical-align:bottom"></td><td colspan="3" style="background-color:#cceeff;padding:0 1pt"></td><td colspan="2" style="background-color:#cceeff;padding:1.5pt 0 1.5pt 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">6.99%</span></td><td style="background-color:#cceeff;padding:1.5pt 1pt 1.5pt 0;text-align:left;vertical-align:bottom"></td></tr></table><span style="font-family:'Times New Roman',serif;font-size:11pt;font-weight:400;line-height:120%"></span></div><div style="margin-top:10pt;text-indent:36pt"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%">Future expected minimum lease commitments under operating leases are as follows (dollars in thousands):</span></div><div style="margin-top:5pt"><table style="border-collapse:collapse;display:inline-table;margin-bottom:5pt;vertical-align:text-bottom;width:100.000%"><tr><td style="width:1.0%"></td><td style="width:81.356%"></td><td style="width:0.1%"></td><td style="width:1.0%"></td><td style="width:16.444%"></td><td style="width:0.1%"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td></tr><tr><td colspan="3" style="padding:0 1pt"></td><td colspan="3" style="padding:1.5pt 1pt;text-align:center;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:700;line-height:100%">Operating Leases</span></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td></tr><tr><td colspan="3" style="background-color:#cceeff;padding:1.5pt 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">Year 1</span></td><td style="background-color:#cceeff;padding:1.5pt 0 1.5pt 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">$</span></td><td style="background-color:#cceeff;padding:1.5pt 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">1,226 </span></td><td style="background-color:#cceeff;padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td></tr><tr><td colspan="3" style="padding:1.5pt 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">Year 2</span></td><td colspan="2" style="padding:1.5pt 0 1.5pt 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">868 </span></td><td style="padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td></tr><tr><td colspan="3" style="background-color:#cceeff;padding:1.5pt 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">Year 3</span></td><td colspan="2" style="background-color:#cceeff;padding:1.5pt 0 1.5pt 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">739 </span></td><td style="background-color:#cceeff;padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td></tr><tr><td colspan="3" style="padding:1.5pt 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">Year 4</span></td><td colspan="2" style="padding:1.5pt 0 1.5pt 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">657 </span></td><td style="padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td></tr><tr><td colspan="3" style="background-color:#cceeff;padding:1.5pt 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">Year 5</span></td><td colspan="2" style="background-color:#cceeff;padding:1.5pt 0 1.5pt 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">603 </span></td><td style="background-color:#cceeff;padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td></tr><tr><td colspan="3" style="padding:1.5pt 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">Thereafter</span></td><td colspan="2" style="padding:1.5pt 0 1.5pt 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">11,614 </span></td><td style="padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td></tr><tr><td colspan="3" style="background-color:#cceeff;padding:1.5pt 1pt 1.5pt 7.75pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:700;line-height:100%">Total lease payments</span></td><td style="background-color:#cceeff;border-top:1pt solid #000000;padding:1.5pt 0 1.5pt 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:700;line-height:100%">$</span></td><td style="background-color:#cceeff;border-top:1pt solid #000000;padding:1.5pt 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:700;line-height:100%">15,707</span><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%"> </span></td><td style="background-color:#cceeff;border-top:1pt solid #000000;padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td></tr><tr><td colspan="3" style="padding:1.5pt 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">Less imputed interest</span></td><td colspan="2" style="padding:1.5pt 0 1.5pt 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">(8,718)</span></td><td style="padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td></tr><tr><td colspan="3" style="background-color:#cceeff;padding:1.5pt 1pt 1.5pt 7.75pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:700;line-height:100%">Total</span></td><td style="background-color:#cceeff;border-bottom:3pt double #000000;border-top:1pt solid #000000;padding:1.5pt 0 1.5pt 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:700;line-height:100%">$</span></td><td style="background-color:#cceeff;border-bottom:3pt double #000000;border-top:1pt solid #000000;padding:1.5pt 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:700;line-height:100%">6,989</span><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%"> </span></td><td style="background-color:#cceeff;border-bottom:3pt double #000000;border-top:1pt solid #000000;padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td></tr></table></div><div style="margin-top:10pt;padding-left:18pt"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-style:italic;font-weight:400;line-height:120%">Energy Storage Agreements</span></div><div style="margin-top:10pt;text-indent:36pt"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%">Tri-State has entered into agreements for 500 MWs of electrical storage capacity with estimated commercial operation dates starting from 2028 to 2030 and terminating by 2052. These agreements include a fixed monthly capacity price for the right to use the storage capacity of the facilities and are expected to be accounted for as leases. Total undiscounted contractual payments over the agreements' terms are estimated to be $1.6 billion.</span></div><div style="margin-top:10pt;padding-left:18pt"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-style:italic;font-weight:400;line-height:120%">Leasing Arrangements as Lessor</span></div><div style="margin-top:10pt;text-indent:36pt"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%">Tri-State has lease agreements as lessor primarily for certain combustion turbine units. The revenue from these lease agreements of $12.6 million and $7.8 million for the three months ended September 30, 2026 and 2025 and $36.5 million and $22.3 million for the nine months ended September 30, 2026 and 2025 are included in other operating revenue on Tri-State's consolidated statements of operations.</span></div><div style="margin-top:10pt;text-indent:36pt"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%">Tri-State has entered into tolling agreements with third parties related to certain combustion turbine units, including at Knutson, Limon and Pyramid Generating Stations, for all capacity and energy through the operation of the contracted units. One such agreement commenced in January 2026. In substance these agreements were determined to be leases.</span></div>The lease arrangement with the Springerville Partnership is not reflected in Tri-State's lease right-of-use asset or liability balances as the associated revenues and expenses are eliminated in consolidation. See Note 17 - Variable Interest Entities. However, as the non-controlling interest associated with this lease arrangement generates book-tax differences, a deferred tax asset and liability have been recorded. LEASES<div style="margin-top:10pt;padding-left:18pt"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-style:italic;font-weight:400;line-height:120%">Leasing Arrangements as Lessee</span></div><div style="margin-top:10pt;text-indent:36pt"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%">Tri-State determines if an arrangement is a lease upon commencement of the contract. If an arrangement is determined to be a long-term lease (greater than 12 months), Tri-State recognizes a right-of-use asset and lease liability based on the present value of the future minimum lease payments over the lease term at the commencement date. As most of Tri-State's leases do not provide an implicit rate, it uses its incremental borrowing rate based on the information available at commencement date in determining the present value of future payments. Tri-State's lease terms may also include options to extend or terminate the lease when it is reasonably certain that those options will be exercised. Lease expense for minimum lease payments is recognized on a straight-line basis over the lease term. Right-of-use assets are included in other deferred charges, the current portion of lease liabilities is included in accrued expenses and the long-term portion of lease liabilities is included in other deferred credits and other liabilities on Tri-State's consolidated statements of financial position.</span></div><div style="margin-top:10pt;text-indent:36pt"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%">Tri-State has elected to apply the short-term lease exception for contracts that have a lease term of twelve months or less and do not include an option to purchase the underlying asset. Therefore, Tri-State does not recognize a right-of-use asset or lease liability for such contracts. Tri-State recognizes short-term lease payments as expense on a straight-line basis over the lease term. Variable lease payments that do not depend on an index or rate are recognized as expense.</span></div><div style="margin-top:10pt;text-indent:36pt"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:700;line-height:120%">Operating Leases</span></div><div style="margin-top:10pt;text-indent:36pt"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%">Tri-State has lease agreements as lessee for the right to use various facilities and operational assets. Rent expense for all short-term and long-term operating leases was $0.6 million for the three months ended September 30, 2026 and $1.1 million for the comparable period in 2025. Rent expense for all short-term and long-term operating leases was $2.0 million for the nine months ended September 30, 2026 and $3.5 million for the comparable period in 2025. Rent expense is included in various categories of operating expenses on Tri-State's consolidated statements of operations based on the type and purpose of the lease. </span></div><div style="margin-top:10pt;text-indent:36pt"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%">Tri-State's consolidated statements of financial position include the following lease components (dollars in thousands):</span><table style="border-collapse:collapse;display:inline-table;margin-bottom:5pt;vertical-align:text-bottom;width:100.000%"><tr><td style="width:1.0%"></td><td style="width:64.543%"></td><td style="width:0.1%"></td><td style="width:1.0%"></td><td style="width:15.712%"></td><td style="width:0.1%"></td><td style="width:0.1%"></td><td style="width:0.530%"></td><td style="width:0.1%"></td><td style="width:1.0%"></td><td style="width:15.715%"></td><td style="width:0.1%"></td></tr><tr><td colspan="3" style="padding:0 1pt"></td><td colspan="3" style="padding:1.5pt 1pt;text-align:center;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:700;line-height:100%">September 30,<br/>2026</span></td><td colspan="3" style="padding:0 1pt"></td><td colspan="3" style="padding:1.5pt 1pt;text-align:center;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:700;line-height:100%">December 31,<br/>2025</span></td></tr><tr><td colspan="3" style="background-color:#cceeff;padding:1.5pt 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:700;line-height:100%">Operating leases:</span></td><td colspan="3" style="background-color:#cceeff;border-top:1pt solid #000000;padding:0 1pt"></td><td colspan="3" style="background-color:#cceeff;padding:0 1pt"></td><td colspan="3" style="background-color:#cceeff;border-top:1pt solid #000000;padding:0 1pt"></td></tr><tr><td colspan="3" style="padding:1.5pt 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%"><span style="-sec-ix-hidden:f-790"><span style="-sec-ix-hidden:f-791">Operating lease right-of-use assets</span></span></span></td><td style="padding:1.5pt 0 1.5pt 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">$</span></td><td style="padding:1.5pt 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">14,119 </span></td><td style="padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"></td><td colspan="3" style="padding:0 1pt"></td><td style="padding:1.5pt 0 1.5pt 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">$</span></td><td style="padding:1.5pt 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">13,807 </span></td><td style="padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"></td></tr><tr><td colspan="3" style="background-color:#cceeff;padding:1.5pt 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">Less: Accumulated amortization</span></td><td colspan="2" style="background-color:#cceeff;padding:1.5pt 0 1.5pt 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">(3,714)</span></td><td style="background-color:#cceeff;padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"></td><td colspan="3" style="background-color:#cceeff;padding:0 1pt"></td><td colspan="2" style="background-color:#cceeff;padding:1.5pt 0 1.5pt 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">(2,874)</span></td><td style="background-color:#cceeff;padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"></td></tr><tr><td colspan="3" style="padding:1.5pt 1pt 1.5pt 7.75pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:700;line-height:100%">Net operating lease right-of-use assets</span></td><td style="border-top:1pt solid #000000;padding:1.5pt 0 1.5pt 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:700;line-height:100%">$</span></td><td style="border-top:1pt solid #000000;padding:1.5pt 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:700;line-height:100%">10,405</span><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%"> </span></td><td style="border-top:1pt solid #000000;padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"></td><td colspan="3" style="padding:0 1pt"></td><td style="border-top:1pt solid #000000;padding:1.5pt 0 1.5pt 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:700;line-height:100%">$</span></td><td style="border-top:1pt solid #000000;padding:1.5pt 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:700;line-height:100%">10,933</span><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%"> </span></td><td style="border-top:1pt solid #000000;padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"></td></tr><tr style="height:14pt"><td colspan="3" style="background-color:#cceeff;padding:0 1pt"></td><td colspan="3" style="background-color:#cceeff;border-top:3pt double #000000;padding:0 1pt"></td><td colspan="3" style="background-color:#cceeff;padding:0 1pt"></td><td colspan="3" style="background-color:#cceeff;border-top:3pt double #000000;padding:0 1pt"></td></tr><tr><td colspan="3" style="padding:1.5pt 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%"><span style="-sec-ix-hidden:f-798"><span style="-sec-ix-hidden:f-799">Operating lease liabilities - current</span></span></span></td><td style="padding:1.5pt 0 1.5pt 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">$</span></td><td style="padding:1.5pt 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">(951)</span></td><td style="padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"></td><td colspan="3" style="padding:0 1pt"></td><td style="padding:1.5pt 0 1.5pt 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">$</span></td><td style="padding:1.5pt 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">(803)</span></td><td style="padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"></td></tr><tr><td colspan="3" style="background-color:#cceeff;padding:1.5pt 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%"><span style="-sec-ix-hidden:f-802"><span style="-sec-ix-hidden:f-803">Operating lease liabilities - noncurrent</span></span></span></td><td colspan="2" style="background-color:#cceeff;padding:1.5pt 0 1.5pt 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">(6,038)</span></td><td style="background-color:#cceeff;padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"></td><td colspan="3" style="background-color:#cceeff;padding:0 1pt"></td><td colspan="2" style="background-color:#cceeff;padding:1.5pt 0 1.5pt 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">(6,473)</span></td><td style="background-color:#cceeff;padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"></td></tr><tr><td colspan="3" style="padding:1.5pt 1pt 1.5pt 7.75pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:700;line-height:100%">Total operating lease liabilities</span></td><td style="border-top:1pt solid #000000;padding:1.5pt 0 1.5pt 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:700;line-height:100%">$</span></td><td style="border-top:1pt solid #000000;padding:1.5pt 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:700;line-height:100%">(6,989)</span></td><td style="border-top:1pt solid #000000;padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"></td><td colspan="3" style="padding:0 1pt"></td><td style="border-top:1pt solid #000000;padding:1.5pt 0 1.5pt 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:700;line-height:100%">$</span></td><td style="border-top:1pt solid #000000;padding:1.5pt 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:700;line-height:100%">(7,276)</span></td><td style="border-top:1pt solid #000000;padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"></td></tr><tr style="height:14pt"><td colspan="3" style="background-color:#cceeff;padding:0 1pt"></td><td colspan="3" style="background-color:#cceeff;border-top:3pt double #000000;padding:0 1pt"></td><td colspan="3" style="background-color:#cceeff;padding:0 1pt"></td><td colspan="3" style="background-color:#cceeff;border-top:3pt double #000000;padding:0 1pt"></td></tr><tr><td colspan="3" style="padding:1.5pt 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:700;line-height:100%">Finance leases:</span></td><td colspan="3" style="padding:0 1pt"></td><td colspan="3" style="padding:0 1pt"></td><td colspan="3" style="padding:0 1pt"></td></tr><tr><td colspan="3" style="background-color:#cceeff;padding:1.5pt 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%"><span style="-sec-ix-hidden:f-808"><span style="-sec-ix-hidden:f-809">Finance lease right-of-use assets</span></span></span></td><td style="background-color:#cceeff;padding:1.5pt 0 1.5pt 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">$</span></td><td style="background-color:#cceeff;padding:1.5pt 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">— </span></td><td style="background-color:#cceeff;padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"></td><td colspan="3" style="background-color:#cceeff;padding:0 1pt"></td><td style="background-color:#cceeff;padding:1.5pt 0 1.5pt 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">$</span></td><td style="background-color:#cceeff;padding:1.5pt 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">95 </span></td><td style="background-color:#cceeff;padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"></td></tr><tr><td colspan="3" style="padding:1.5pt 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">Less: Accumulated amortization</span></td><td colspan="2" style="padding:1.5pt 0 1.5pt 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">— </span></td><td style="padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"></td><td colspan="3" style="padding:0 1pt"></td><td colspan="2" style="padding:1.5pt 0 1.5pt 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">(73)</span></td><td style="padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"></td></tr><tr><td colspan="3" style="background-color:#cceeff;padding:1.5pt 1pt 1.5pt 7.75pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:700;line-height:100%">Net finance lease right-of-use assets</span></td><td style="background-color:#cceeff;border-top:1pt solid #000;padding:1.5pt 0 1.5pt 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">$</span></td><td style="background-color:#cceeff;border-top:1pt solid #000;padding:1.5pt 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">— </span></td><td style="background-color:#cceeff;border-top:1pt solid #000;padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"></td><td colspan="3" style="background-color:#cceeff;padding:0 1pt"></td><td style="background-color:#cceeff;border-top:1pt solid #000;padding:1.5pt 0 1.5pt 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">$</span></td><td style="background-color:#cceeff;border-top:1pt solid #000;padding:1.5pt 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">22 </span></td><td style="background-color:#cceeff;border-top:1pt solid #000;padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"></td></tr><tr style="height:14pt"><td colspan="3" style="padding:0 1pt"></td><td colspan="3" style="border-top:3pt double #000;padding:0 1pt"></td><td colspan="3" style="padding:0 1pt"></td><td colspan="3" style="border-top:3pt double #000;padding:0 1pt"></td></tr><tr><td colspan="3" style="background-color:#cceeff;padding:1.5pt 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%"><span style="-sec-ix-hidden:f-816"><span style="-sec-ix-hidden:f-817">Finance lease liabilities - current</span></span></span></td><td style="background-color:#cceeff;padding:1.5pt 0 1.5pt 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">$</span></td><td style="background-color:#cceeff;padding:1.5pt 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">— </span></td><td style="background-color:#cceeff;padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"></td><td colspan="3" style="background-color:#cceeff;padding:0 1pt"></td><td style="background-color:#cceeff;padding:1.5pt 0 1.5pt 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">$</span></td><td style="background-color:#cceeff;padding:1.5pt 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">(13)</span></td><td style="background-color:#cceeff;padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"></td></tr><tr><td colspan="3" style="padding:1.5pt 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%"><span style="-sec-ix-hidden:f-820"><span style="-sec-ix-hidden:f-821">Finance lease liabilities - noncurrent</span></span></span></td><td colspan="2" style="padding:1.5pt 0 1.5pt 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">— </span></td><td style="padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"></td><td colspan="3" style="padding:0 1pt"></td><td colspan="2" style="padding:1.5pt 0 1.5pt 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">— </span></td><td style="padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"></td></tr><tr><td colspan="3" style="background-color:#cceeff;padding:1.5pt 1pt 1.5pt 7.75pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:700;line-height:100%">Total finance lease liabilities</span></td><td style="background-color:#cceeff;border-top:1pt solid #000;padding:1.5pt 0 1.5pt 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">$</span></td><td style="background-color:#cceeff;border-top:1pt solid #000;padding:1.5pt 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">— </span></td><td style="background-color:#cceeff;border-top:1pt solid #000;padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"></td><td colspan="3" style="background-color:#cceeff;padding:0 1pt"></td><td style="background-color:#cceeff;border-top:1pt solid #000;padding:1.5pt 0 1.5pt 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">$</span></td><td style="background-color:#cceeff;border-top:1pt solid #000;padding:1.5pt 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">(13)</span></td><td style="background-color:#cceeff;border-top:1pt solid #000;padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"></td></tr><tr style="height:14pt"><td colspan="3" style="padding:0 1pt"></td><td colspan="3" style="border-top:3pt double #000;padding:0 1pt"></td><td colspan="3" style="padding:0 1pt"></td><td colspan="3" style="border-top:3pt double #000;padding:0 1pt"></td></tr><tr><td colspan="3" style="background-color:#cceeff;padding:1.5pt 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:700;line-height:100%">Lease Term and Discount Rate:</span></td><td colspan="3" style="background-color:#cceeff;padding:0 1pt"></td><td colspan="3" style="background-color:#cceeff;padding:0 1pt"></td><td colspan="3" style="background-color:#cceeff;padding:0 1pt"></td></tr><tr><td colspan="3" style="padding:1.5pt 1pt 1.5pt 7.75pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:700;line-height:100%">Weighted-average remaining lease term (in years)</span></td><td colspan="3" style="padding:0 1pt"></td><td colspan="3" style="padding:0 1pt"></td><td colspan="3" style="padding:0 1pt"></td></tr><tr><td colspan="3" style="background-color:#cceeff;padding:1.5pt 1pt 1.5pt 7.75pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">Operating leases</span></td><td colspan="3" style="background-color:#cceeff;padding:1.5pt 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">27.0</span></td><td colspan="3" style="background-color:#cceeff;padding:0 1pt"></td><td colspan="3" style="background-color:#cceeff;padding:1.5pt 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">26.9</span></td></tr><tr><td colspan="3" style="padding:1.5pt 1pt 1.5pt 7.75pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">Finance leases</span></td><td colspan="3" style="padding:1.5pt 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">0</span></td><td colspan="3" style="padding:0 1pt"></td><td colspan="3" style="padding:1.5pt 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">0.5</span></td></tr><tr><td colspan="3" style="background-color:#cceeff;padding:1.5pt 1pt 1.5pt 7.75pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:700;line-height:100%">Weighted-average discount rate</span></td><td colspan="3" style="background-color:#cceeff;padding:0 1pt"></td><td colspan="3" style="background-color:#cceeff;padding:0 1pt"></td><td colspan="3" style="background-color:#cceeff;padding:0 1pt"></td></tr><tr><td colspan="3" style="padding:1.5pt 1pt 1.5pt 7.75pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">Operating leases</span></td><td colspan="2" style="padding:1.5pt 0 1.5pt 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">6.83 </span></td><td style="padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">%</span></td><td colspan="3" style="padding:0 1pt"></td><td colspan="2" style="padding:1.5pt 0 1.5pt 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">6.82 </span></td><td style="padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">%</span></td></tr><tr><td colspan="3" style="background-color:#cceeff;padding:1.5pt 1pt 1.5pt 7.75pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">Finance leases</span></td><td colspan="2" style="background-color:#cceeff;padding:1.5pt 0 1.5pt 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">—%</span></td><td style="background-color:#cceeff;padding:1.5pt 1pt 1.5pt 0;text-align:left;vertical-align:bottom"></td><td colspan="3" style="background-color:#cceeff;padding:0 1pt"></td><td colspan="2" style="background-color:#cceeff;padding:1.5pt 0 1.5pt 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">6.99%</span></td><td style="background-color:#cceeff;padding:1.5pt 1pt 1.5pt 0;text-align:left;vertical-align:bottom"></td></tr></table><span style="font-family:'Times New Roman',serif;font-size:11pt;font-weight:400;line-height:120%"></span></div><div style="margin-top:10pt;text-indent:36pt"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%">Future expected minimum lease commitments under operating leases are as follows (dollars in thousands):</span></div><div style="margin-top:5pt"><table style="border-collapse:collapse;display:inline-table;margin-bottom:5pt;vertical-align:text-bottom;width:100.000%"><tr><td style="width:1.0%"></td><td style="width:81.356%"></td><td style="width:0.1%"></td><td style="width:1.0%"></td><td style="width:16.444%"></td><td style="width:0.1%"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td></tr><tr><td colspan="3" style="padding:0 1pt"></td><td colspan="3" style="padding:1.5pt 1pt;text-align:center;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:700;line-height:100%">Operating Leases</span></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td></tr><tr><td colspan="3" style="background-color:#cceeff;padding:1.5pt 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">Year 1</span></td><td style="background-color:#cceeff;padding:1.5pt 0 1.5pt 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">$</span></td><td style="background-color:#cceeff;padding:1.5pt 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">1,226 </span></td><td style="background-color:#cceeff;padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td></tr><tr><td colspan="3" style="padding:1.5pt 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">Year 2</span></td><td colspan="2" style="padding:1.5pt 0 1.5pt 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">868 </span></td><td style="padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td></tr><tr><td colspan="3" style="background-color:#cceeff;padding:1.5pt 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">Year 3</span></td><td colspan="2" style="background-color:#cceeff;padding:1.5pt 0 1.5pt 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">739 </span></td><td style="background-color:#cceeff;padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td></tr><tr><td colspan="3" style="padding:1.5pt 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">Year 4</span></td><td colspan="2" style="padding:1.5pt 0 1.5pt 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">657 </span></td><td style="padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td></tr><tr><td colspan="3" style="background-color:#cceeff;padding:1.5pt 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">Year 5</span></td><td colspan="2" style="background-color:#cceeff;padding:1.5pt 0 1.5pt 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">603 </span></td><td style="background-color:#cceeff;padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td></tr><tr><td colspan="3" style="padding:1.5pt 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">Thereafter</span></td><td colspan="2" style="padding:1.5pt 0 1.5pt 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">11,614 </span></td><td style="padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td></tr><tr><td colspan="3" style="background-color:#cceeff;padding:1.5pt 1pt 1.5pt 7.75pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:700;line-height:100%">Total lease payments</span></td><td style="background-color:#cceeff;border-top:1pt solid #000000;padding:1.5pt 0 1.5pt 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:700;line-height:100%">$</span></td><td style="background-color:#cceeff;border-top:1pt solid #000000;padding:1.5pt 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:700;line-height:100%">15,707</span><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%"> </span></td><td style="background-color:#cceeff;border-top:1pt solid #000000;padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td></tr><tr><td colspan="3" style="padding:1.5pt 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">Less imputed interest</span></td><td colspan="2" style="padding:1.5pt 0 1.5pt 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">(8,718)</span></td><td style="padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td></tr><tr><td colspan="3" style="background-color:#cceeff;padding:1.5pt 1pt 1.5pt 7.75pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:700;line-height:100%">Total</span></td><td style="background-color:#cceeff;border-bottom:3pt double #000000;border-top:1pt solid #000000;padding:1.5pt 0 1.5pt 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:700;line-height:100%">$</span></td><td style="background-color:#cceeff;border-bottom:3pt double #000000;border-top:1pt solid #000000;padding:1.5pt 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:700;line-height:100%">6,989</span><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%"> </span></td><td style="background-color:#cceeff;border-bottom:3pt double #000000;border-top:1pt solid #000000;padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td></tr></table></div><div style="margin-top:10pt;padding-left:18pt"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-style:italic;font-weight:400;line-height:120%">Energy Storage Agreements</span></div><div style="margin-top:10pt;text-indent:36pt"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%">Tri-State has entered into agreements for 500 MWs of electrical storage capacity with estimated commercial operation dates starting from 2028 to 2030 and terminating by 2052. These agreements include a fixed monthly capacity price for the right to use the storage capacity of the facilities and are expected to be accounted for as leases. Total undiscounted contractual payments over the agreements' terms are estimated to be $1.6 billion.</span></div><div style="margin-top:10pt;padding-left:18pt"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-style:italic;font-weight:400;line-height:120%">Leasing Arrangements as Lessor</span></div><div style="margin-top:10pt;text-indent:36pt"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%">Tri-State has lease agreements as lessor primarily for certain combustion turbine units. The revenue from these lease agreements of $12.6 million and $7.8 million for the three months ended September 30, 2026 and 2025 and $36.5 million and $22.3 million for the nine months ended September 30, 2026 and 2025 are included in other operating revenue on Tri-State's consolidated statements of operations.</span></div><div style="margin-top:10pt;text-indent:36pt"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%">Tri-State has entered into tolling agreements with third parties related to certain combustion turbine units, including at Knutson, Limon and Pyramid Generating Stations, for all capacity and energy through the operation of the contracted units. One such agreement commenced in January 2026. In substance these agreements were determined to be leases.</span></div>The lease arrangement with the Springerville Partnership is not reflected in Tri-State's lease right-of-use asset or liability balances as the associated revenues and expenses are eliminated in consolidation. See Note 17 - Variable Interest Entities. However, as the non-controlling interest associated with this lease arrangement generates book-tax differences, a deferred tax asset and liability have been recorded. 600000 1100000 2000000.0 3500000 <div style="margin-top:10pt;text-indent:36pt"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%">Tri-State's consolidated statements of financial position include the following lease components (dollars in thousands):</span><table style="border-collapse:collapse;display:inline-table;margin-bottom:5pt;vertical-align:text-bottom;width:100.000%"><tr><td style="width:1.0%"></td><td style="width:64.543%"></td><td style="width:0.1%"></td><td style="width:1.0%"></td><td style="width:15.712%"></td><td style="width:0.1%"></td><td style="width:0.1%"></td><td style="width:0.530%"></td><td style="width:0.1%"></td><td style="width:1.0%"></td><td style="width:15.715%"></td><td style="width:0.1%"></td></tr><tr><td colspan="3" style="padding:0 1pt"></td><td colspan="3" style="padding:1.5pt 1pt;text-align:center;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:700;line-height:100%">September 30,<br/>2026</span></td><td colspan="3" style="padding:0 1pt"></td><td colspan="3" style="padding:1.5pt 1pt;text-align:center;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:700;line-height:100%">December 31,<br/>2025</span></td></tr><tr><td colspan="3" style="background-color:#cceeff;padding:1.5pt 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:700;line-height:100%">Operating leases:</span></td><td colspan="3" style="background-color:#cceeff;border-top:1pt solid #000000;padding:0 1pt"></td><td colspan="3" style="background-color:#cceeff;padding:0 1pt"></td><td colspan="3" style="background-color:#cceeff;border-top:1pt solid #000000;padding:0 1pt"></td></tr><tr><td colspan="3" style="padding:1.5pt 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%"><span style="-sec-ix-hidden:f-790"><span style="-sec-ix-hidden:f-791">Operating lease right-of-use assets</span></span></span></td><td style="padding:1.5pt 0 1.5pt 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">$</span></td><td style="padding:1.5pt 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">14,119 </span></td><td style="padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"></td><td colspan="3" style="padding:0 1pt"></td><td style="padding:1.5pt 0 1.5pt 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">$</span></td><td style="padding:1.5pt 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">13,807 </span></td><td style="padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"></td></tr><tr><td colspan="3" style="background-color:#cceeff;padding:1.5pt 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">Less: Accumulated amortization</span></td><td colspan="2" style="background-color:#cceeff;padding:1.5pt 0 1.5pt 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">(3,714)</span></td><td style="background-color:#cceeff;padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"></td><td colspan="3" style="background-color:#cceeff;padding:0 1pt"></td><td colspan="2" style="background-color:#cceeff;padding:1.5pt 0 1.5pt 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">(2,874)</span></td><td style="background-color:#cceeff;padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"></td></tr><tr><td colspan="3" style="padding:1.5pt 1pt 1.5pt 7.75pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:700;line-height:100%">Net operating lease right-of-use assets</span></td><td style="border-top:1pt solid #000000;padding:1.5pt 0 1.5pt 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:700;line-height:100%">$</span></td><td style="border-top:1pt solid #000000;padding:1.5pt 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:700;line-height:100%">10,405</span><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%"> </span></td><td style="border-top:1pt solid #000000;padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"></td><td colspan="3" style="padding:0 1pt"></td><td style="border-top:1pt solid #000000;padding:1.5pt 0 1.5pt 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:700;line-height:100%">$</span></td><td style="border-top:1pt solid #000000;padding:1.5pt 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:700;line-height:100%">10,933</span><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%"> </span></td><td style="border-top:1pt solid #000000;padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"></td></tr><tr style="height:14pt"><td colspan="3" style="background-color:#cceeff;padding:0 1pt"></td><td colspan="3" style="background-color:#cceeff;border-top:3pt double #000000;padding:0 1pt"></td><td colspan="3" style="background-color:#cceeff;padding:0 1pt"></td><td colspan="3" style="background-color:#cceeff;border-top:3pt double #000000;padding:0 1pt"></td></tr><tr><td colspan="3" style="padding:1.5pt 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%"><span style="-sec-ix-hidden:f-798"><span style="-sec-ix-hidden:f-799">Operating lease liabilities - current</span></span></span></td><td style="padding:1.5pt 0 1.5pt 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">$</span></td><td style="padding:1.5pt 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">(951)</span></td><td style="padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"></td><td colspan="3" style="padding:0 1pt"></td><td style="padding:1.5pt 0 1.5pt 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">$</span></td><td style="padding:1.5pt 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">(803)</span></td><td style="padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"></td></tr><tr><td colspan="3" style="background-color:#cceeff;padding:1.5pt 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%"><span style="-sec-ix-hidden:f-802"><span style="-sec-ix-hidden:f-803">Operating lease liabilities - noncurrent</span></span></span></td><td colspan="2" style="background-color:#cceeff;padding:1.5pt 0 1.5pt 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">(6,038)</span></td><td style="background-color:#cceeff;padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"></td><td colspan="3" style="background-color:#cceeff;padding:0 1pt"></td><td colspan="2" style="background-color:#cceeff;padding:1.5pt 0 1.5pt 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">(6,473)</span></td><td style="background-color:#cceeff;padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"></td></tr><tr><td colspan="3" style="padding:1.5pt 1pt 1.5pt 7.75pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:700;line-height:100%">Total operating lease liabilities</span></td><td style="border-top:1pt solid #000000;padding:1.5pt 0 1.5pt 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:700;line-height:100%">$</span></td><td style="border-top:1pt solid #000000;padding:1.5pt 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:700;line-height:100%">(6,989)</span></td><td style="border-top:1pt solid #000000;padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"></td><td colspan="3" style="padding:0 1pt"></td><td style="border-top:1pt solid #000000;padding:1.5pt 0 1.5pt 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:700;line-height:100%">$</span></td><td style="border-top:1pt solid #000000;padding:1.5pt 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:700;line-height:100%">(7,276)</span></td><td style="border-top:1pt solid #000000;padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"></td></tr><tr style="height:14pt"><td colspan="3" style="background-color:#cceeff;padding:0 1pt"></td><td colspan="3" style="background-color:#cceeff;border-top:3pt double #000000;padding:0 1pt"></td><td colspan="3" style="background-color:#cceeff;padding:0 1pt"></td><td colspan="3" style="background-color:#cceeff;border-top:3pt double #000000;padding:0 1pt"></td></tr><tr><td colspan="3" style="padding:1.5pt 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:700;line-height:100%">Finance leases:</span></td><td colspan="3" style="padding:0 1pt"></td><td colspan="3" style="padding:0 1pt"></td><td colspan="3" style="padding:0 1pt"></td></tr><tr><td colspan="3" style="background-color:#cceeff;padding:1.5pt 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%"><span style="-sec-ix-hidden:f-808"><span style="-sec-ix-hidden:f-809">Finance lease right-of-use assets</span></span></span></td><td style="background-color:#cceeff;padding:1.5pt 0 1.5pt 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">$</span></td><td style="background-color:#cceeff;padding:1.5pt 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">— </span></td><td style="background-color:#cceeff;padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"></td><td colspan="3" style="background-color:#cceeff;padding:0 1pt"></td><td style="background-color:#cceeff;padding:1.5pt 0 1.5pt 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">$</span></td><td style="background-color:#cceeff;padding:1.5pt 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">95 </span></td><td style="background-color:#cceeff;padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"></td></tr><tr><td colspan="3" style="padding:1.5pt 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">Less: Accumulated amortization</span></td><td colspan="2" style="padding:1.5pt 0 1.5pt 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">— </span></td><td style="padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"></td><td colspan="3" style="padding:0 1pt"></td><td colspan="2" style="padding:1.5pt 0 1.5pt 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">(73)</span></td><td style="padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"></td></tr><tr><td colspan="3" style="background-color:#cceeff;padding:1.5pt 1pt 1.5pt 7.75pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:700;line-height:100%">Net finance lease right-of-use assets</span></td><td style="background-color:#cceeff;border-top:1pt solid #000;padding:1.5pt 0 1.5pt 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">$</span></td><td style="background-color:#cceeff;border-top:1pt solid #000;padding:1.5pt 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">— </span></td><td style="background-color:#cceeff;border-top:1pt solid #000;padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"></td><td colspan="3" style="background-color:#cceeff;padding:0 1pt"></td><td style="background-color:#cceeff;border-top:1pt solid #000;padding:1.5pt 0 1.5pt 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">$</span></td><td style="background-color:#cceeff;border-top:1pt solid #000;padding:1.5pt 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">22 </span></td><td style="background-color:#cceeff;border-top:1pt solid #000;padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"></td></tr><tr style="height:14pt"><td colspan="3" style="padding:0 1pt"></td><td colspan="3" style="border-top:3pt double #000;padding:0 1pt"></td><td colspan="3" style="padding:0 1pt"></td><td colspan="3" style="border-top:3pt double #000;padding:0 1pt"></td></tr><tr><td colspan="3" style="background-color:#cceeff;padding:1.5pt 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%"><span style="-sec-ix-hidden:f-816"><span style="-sec-ix-hidden:f-817">Finance lease liabilities - current</span></span></span></td><td style="background-color:#cceeff;padding:1.5pt 0 1.5pt 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">$</span></td><td style="background-color:#cceeff;padding:1.5pt 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">— </span></td><td style="background-color:#cceeff;padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"></td><td colspan="3" style="background-color:#cceeff;padding:0 1pt"></td><td style="background-color:#cceeff;padding:1.5pt 0 1.5pt 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">$</span></td><td style="background-color:#cceeff;padding:1.5pt 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">(13)</span></td><td style="background-color:#cceeff;padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"></td></tr><tr><td colspan="3" style="padding:1.5pt 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%"><span style="-sec-ix-hidden:f-820"><span style="-sec-ix-hidden:f-821">Finance lease liabilities - noncurrent</span></span></span></td><td colspan="2" style="padding:1.5pt 0 1.5pt 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">— </span></td><td style="padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"></td><td colspan="3" style="padding:0 1pt"></td><td colspan="2" style="padding:1.5pt 0 1.5pt 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">— </span></td><td style="padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"></td></tr><tr><td colspan="3" style="background-color:#cceeff;padding:1.5pt 1pt 1.5pt 7.75pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:700;line-height:100%">Total finance lease liabilities</span></td><td style="background-color:#cceeff;border-top:1pt solid #000;padding:1.5pt 0 1.5pt 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">$</span></td><td style="background-color:#cceeff;border-top:1pt solid #000;padding:1.5pt 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">— </span></td><td style="background-color:#cceeff;border-top:1pt solid #000;padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"></td><td colspan="3" style="background-color:#cceeff;padding:0 1pt"></td><td style="background-color:#cceeff;border-top:1pt solid #000;padding:1.5pt 0 1.5pt 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">$</span></td><td style="background-color:#cceeff;border-top:1pt solid #000;padding:1.5pt 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">(13)</span></td><td style="background-color:#cceeff;border-top:1pt solid #000;padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"></td></tr><tr style="height:14pt"><td colspan="3" style="padding:0 1pt"></td><td colspan="3" style="border-top:3pt double #000;padding:0 1pt"></td><td colspan="3" style="padding:0 1pt"></td><td colspan="3" style="border-top:3pt double #000;padding:0 1pt"></td></tr><tr><td colspan="3" style="background-color:#cceeff;padding:1.5pt 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:700;line-height:100%">Lease Term and Discount Rate:</span></td><td colspan="3" style="background-color:#cceeff;padding:0 1pt"></td><td colspan="3" style="background-color:#cceeff;padding:0 1pt"></td><td colspan="3" style="background-color:#cceeff;padding:0 1pt"></td></tr><tr><td colspan="3" style="padding:1.5pt 1pt 1.5pt 7.75pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:700;line-height:100%">Weighted-average remaining lease term (in years)</span></td><td colspan="3" style="padding:0 1pt"></td><td colspan="3" style="padding:0 1pt"></td><td colspan="3" style="padding:0 1pt"></td></tr><tr><td colspan="3" style="background-color:#cceeff;padding:1.5pt 1pt 1.5pt 7.75pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">Operating leases</span></td><td colspan="3" style="background-color:#cceeff;padding:1.5pt 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">27.0</span></td><td colspan="3" style="background-color:#cceeff;padding:0 1pt"></td><td colspan="3" style="background-color:#cceeff;padding:1.5pt 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">26.9</span></td></tr><tr><td colspan="3" style="padding:1.5pt 1pt 1.5pt 7.75pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">Finance leases</span></td><td colspan="3" style="padding:1.5pt 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">0</span></td><td colspan="3" style="padding:0 1pt"></td><td colspan="3" style="padding:1.5pt 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">0.5</span></td></tr><tr><td colspan="3" style="background-color:#cceeff;padding:1.5pt 1pt 1.5pt 7.75pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:700;line-height:100%">Weighted-average discount rate</span></td><td colspan="3" style="background-color:#cceeff;padding:0 1pt"></td><td colspan="3" style="background-color:#cceeff;padding:0 1pt"></td><td colspan="3" style="background-color:#cceeff;padding:0 1pt"></td></tr><tr><td colspan="3" style="padding:1.5pt 1pt 1.5pt 7.75pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">Operating leases</span></td><td colspan="2" style="padding:1.5pt 0 1.5pt 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">6.83 </span></td><td style="padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">%</span></td><td colspan="3" style="padding:0 1pt"></td><td colspan="2" style="padding:1.5pt 0 1.5pt 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">6.82 </span></td><td style="padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">%</span></td></tr><tr><td colspan="3" style="background-color:#cceeff;padding:1.5pt 1pt 1.5pt 7.75pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">Finance leases</span></td><td colspan="2" style="background-color:#cceeff;padding:1.5pt 0 1.5pt 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">—%</span></td><td style="background-color:#cceeff;padding:1.5pt 1pt 1.5pt 0;text-align:left;vertical-align:bottom"></td><td colspan="3" style="background-color:#cceeff;padding:0 1pt"></td><td colspan="2" style="background-color:#cceeff;padding:1.5pt 0 1.5pt 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">6.99%</span></td><td style="background-color:#cceeff;padding:1.5pt 1pt 1.5pt 0;text-align:left;vertical-align:bottom"></td></tr></table><span style="font-family:'Times New Roman',serif;font-size:11pt;font-weight:400;line-height:120%"></span></div> 14119000 13807000 3714000 2874000 10405000 10933000 951000 803000 6038000 6473000 6989000 7276000 0 95000 0 73000 0 22000 0 13000 0 0 0 13000 P27Y P26Y10M24D P0Y P0Y6M 0.0683 0.0682 0 0.0699 <div style="margin-top:10pt;text-indent:36pt"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%">Future expected minimum lease commitments under operating leases are as follows (dollars in thousands):</span></div><div style="margin-top:5pt"><table style="border-collapse:collapse;display:inline-table;margin-bottom:5pt;vertical-align:text-bottom;width:100.000%"><tr><td style="width:1.0%"></td><td style="width:81.356%"></td><td style="width:0.1%"></td><td style="width:1.0%"></td><td style="width:16.444%"></td><td style="width:0.1%"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td></tr><tr><td colspan="3" style="padding:0 1pt"></td><td colspan="3" style="padding:1.5pt 1pt;text-align:center;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:700;line-height:100%">Operating Leases</span></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td></tr><tr><td colspan="3" style="background-color:#cceeff;padding:1.5pt 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">Year 1</span></td><td style="background-color:#cceeff;padding:1.5pt 0 1.5pt 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">$</span></td><td style="background-color:#cceeff;padding:1.5pt 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">1,226 </span></td><td style="background-color:#cceeff;padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td></tr><tr><td colspan="3" style="padding:1.5pt 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">Year 2</span></td><td colspan="2" style="padding:1.5pt 0 1.5pt 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">868 </span></td><td style="padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td></tr><tr><td colspan="3" style="background-color:#cceeff;padding:1.5pt 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">Year 3</span></td><td colspan="2" style="background-color:#cceeff;padding:1.5pt 0 1.5pt 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">739 </span></td><td style="background-color:#cceeff;padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td></tr><tr><td colspan="3" style="padding:1.5pt 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">Year 4</span></td><td colspan="2" style="padding:1.5pt 0 1.5pt 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">657 </span></td><td style="padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td></tr><tr><td colspan="3" style="background-color:#cceeff;padding:1.5pt 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">Year 5</span></td><td colspan="2" style="background-color:#cceeff;padding:1.5pt 0 1.5pt 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">603 </span></td><td style="background-color:#cceeff;padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td></tr><tr><td colspan="3" style="padding:1.5pt 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">Thereafter</span></td><td colspan="2" style="padding:1.5pt 0 1.5pt 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">11,614 </span></td><td style="padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td></tr><tr><td colspan="3" style="background-color:#cceeff;padding:1.5pt 1pt 1.5pt 7.75pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:700;line-height:100%">Total lease payments</span></td><td style="background-color:#cceeff;border-top:1pt solid #000000;padding:1.5pt 0 1.5pt 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:700;line-height:100%">$</span></td><td style="background-color:#cceeff;border-top:1pt solid #000000;padding:1.5pt 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:700;line-height:100%">15,707</span><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%"> </span></td><td style="background-color:#cceeff;border-top:1pt solid #000000;padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td></tr><tr><td colspan="3" style="padding:1.5pt 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">Less imputed interest</span></td><td colspan="2" style="padding:1.5pt 0 1.5pt 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">(8,718)</span></td><td style="padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td></tr><tr><td colspan="3" style="background-color:#cceeff;padding:1.5pt 1pt 1.5pt 7.75pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:700;line-height:100%">Total</span></td><td style="background-color:#cceeff;border-bottom:3pt double #000000;border-top:1pt solid #000000;padding:1.5pt 0 1.5pt 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:700;line-height:100%">$</span></td><td style="background-color:#cceeff;border-bottom:3pt double #000000;border-top:1pt solid #000000;padding:1.5pt 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:700;line-height:100%">6,989</span><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%"> </span></td><td style="background-color:#cceeff;border-bottom:3pt double #000000;border-top:1pt solid #000000;padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td></tr></table></div> 1226000 868000 739000 657000 603000 11614000 15707000 8718000 6989000 1600000000 12600000 7800000 36500000 22300000 FAIR VALUE<div style="margin-top:10pt;text-indent:36pt"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%">Fair value is defined as the price that would be received to sell an asset or paid to transfer a liability between market participants in the principal market, or in the most advantageous market when no principal market exists. The fair value measurement accounting guidance emphasizes that fair value is a market-based measurement, not an entity-specific measurement. Therefore, a fair value measurement should be determined based on the assumptions that market participants would use in pricing the asset or liability (market participants are assumed to be independent, knowledgeable, able and willing to transact an exchange and not under duress). In considering market participant assumptions in fair value measurements, a three-tier fair value hierarchy for measuring fair value was established which prioritizes the inputs used in measuring fair value as follows:</span></div><div style="margin-top:10pt;padding-left:36pt"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%">Level 1 inputs are based upon quoted prices for identical instruments traded in active (exchange-traded) markets. Valuations are obtained from readily available pricing sources for market transactions (observable market data) involving identical assets or liabilities.</span></div><div style="margin-top:10pt;padding-left:36pt"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%">Level 2 inputs are based upon quoted prices for similar instruments in active markets, quoted prices for identical or similar instruments in markets that are not active and model-based valuation techniques (such as option pricing models, discounted cash flow models) for which all significant assumptions are observable in the market.</span></div><div style="margin-top:10pt;padding-left:36pt"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%">Level 3 inputs consist of unobservable market data which is typically based on an entity’s own assumptions of what a market participant would use in pricing an asset or liability as there is little, if any, related market activity.</span></div><div style="margin-top:10pt;text-indent:36pt"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%">In instances where the determination of the fair value measurement is based on inputs from different levels of the fair value hierarchy, the level in the fair value hierarchy within which the entire fair value measurement falls is based on the lowest level input that is significant to the fair value measurement in its entirety. The assessment of the significance of a particular input to the fair value measurement in its entirety requires judgment and considers factors specific to the asset or liability. </span></div><div style="margin-top:10pt;padding-left:18pt"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-style:italic;font-weight:400;line-height:120%">Executive Benefit Restoration Plan Trust</span></div><div style="margin-top:10pt;text-indent:36pt"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%">Tri-State has an irrevocable trust with an independent third party to fund the NRECA Executive Benefit Restoration Plan. The trust is funded quarterly to the prior year obligation as determined by the NRECA actuary. The trust consists of investments in equity and debt securities and are measured at fair value on a recurring basis. Changes in the fair value of investments in equity securities are recognized in earnings and changes in fair value of investments in debt securities classified as available-for-sale are recognized in other comprehensive income until realized. The estimated fair value of the investments is based upon their active market value (Level 1 inputs) and is included in other noncurrent assets on Tri-State's consolidated </span></div><div style="margin-top:10pt"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%">statements of financial position. The cost and fair values of Tri-State's marketable securities related to the executive benefit restoration plan trust are as follows (dollars in thousands):</span></div><div style="margin-top:5pt"><table style="border-collapse:collapse;display:inline-table;margin-bottom:5pt;vertical-align:text-bottom;width:100.000%"><tr><td style="width:1.0%"></td><td style="width:45.245%"></td><td style="width:0.1%"></td><td style="width:1.0%"></td><td style="width:11.765%"></td><td style="width:0.1%"></td><td style="width:0.1%"></td><td style="width:0.530%"></td><td style="width:0.1%"></td><td style="width:1.0%"></td><td style="width:11.765%"></td><td style="width:0.1%"></td><td style="width:0.1%"></td><td style="width:0.530%"></td><td style="width:0.1%"></td><td style="width:1.0%"></td><td style="width:11.765%"></td><td style="width:0.1%"></td><td style="width:0.1%"></td><td style="width:0.530%"></td><td style="width:0.1%"></td><td style="width:1.0%"></td><td style="width:11.770%"></td><td style="width:0.1%"></td></tr><tr><td colspan="3" style="padding:0 1pt"></td><td colspan="9" style="padding:1.5pt 1pt;text-align:center;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:8pt;font-weight:700;line-height:120%">September 30, 2026</span></td><td colspan="3" style="padding:0 1pt"></td><td colspan="9" style="padding:1.5pt 1pt;text-align:center;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:8pt;font-weight:700;line-height:120%">December 31, 2025</span></td></tr><tr><td colspan="3" style="padding:0 1pt"></td><td colspan="3" style="border-top:1pt solid #000000;padding:1.5pt 1pt;text-align:center;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:8pt;font-weight:700;line-height:120%">Cost</span></td><td colspan="3" style="border-top:1pt solid #000000;padding:0 1pt"></td><td colspan="3" style="border-top:1pt solid #000000;padding:1.5pt 1pt;text-align:center;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:8pt;font-weight:700;line-height:120%">Estimated<br/>Fair Value</span></td><td colspan="3" style="padding:0 1pt"></td><td colspan="3" style="border-top:1pt solid #000000;padding:1.5pt 1pt;text-align:center;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:8pt;font-weight:700;line-height:120%">Cost</span></td><td colspan="3" style="border-top:1pt solid #000000;padding:0 1pt"></td><td colspan="3" style="border-top:1pt solid #000000;padding:1.5pt 1pt;text-align:center;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:8pt;font-weight:700;line-height:120%">Estimated<br/>Fair Value</span></td></tr><tr><td colspan="3" style="background-color:#cceeff;padding:1.5pt 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%">Executive benefit restoration plan trust</span></td><td style="background-color:#cceeff;border-top:1pt solid #000000;padding:1.5pt 0 1.5pt 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%">$</span></td><td style="background-color:#cceeff;border-top:1pt solid #000000;padding:1.5pt 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%">10,609 </span></td><td style="background-color:#cceeff;border-top:1pt solid #000000;padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"></td><td colspan="3" style="background-color:#cceeff;padding:0 1pt"></td><td style="background-color:#cceeff;border-top:1pt solid #000000;padding:1.5pt 0 1.5pt 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%">$</span></td><td style="background-color:#cceeff;border-top:1pt solid #000000;padding:1.5pt 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%">10,395 </span></td><td style="background-color:#cceeff;border-top:1pt solid #000000;padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"></td><td colspan="3" style="background-color:#cceeff;padding:0 1pt"></td><td style="background-color:#cceeff;border-top:1pt solid #000000;padding:1.5pt 0 1.5pt 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%">$</span></td><td style="background-color:#cceeff;border-top:1pt solid #000000;padding:1.5pt 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%">10,337 </span></td><td style="background-color:#cceeff;border-top:1pt solid #000000;padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"></td><td colspan="3" style="background-color:#cceeff;padding:0 1pt"></td><td style="background-color:#cceeff;border-top:1pt solid #000000;padding:1.5pt 0 1.5pt 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%">$</span></td><td style="background-color:#cceeff;border-top:1pt solid #000000;padding:1.5pt 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%">10,360 </span></td><td style="background-color:#cceeff;border-top:1pt solid #000000;padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"></td></tr></table></div><div style="margin-top:10pt;padding-left:18pt"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-style:italic;font-weight:400;line-height:120%">Deferred Compensation</span></div><div style="margin-top:10pt;text-indent:36pt"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%">Tri-State holds marketable securities in connection with the directors’ and executives’ elective deferred compensation plans which consist of investments in stock funds, bond funds and money market funds. These securities are measured at fair value on a recurring basis with changes in fair value recognized in earnings. The estimated fair value of the investments is based upon their active market value (Level 1 inputs) and is included in other noncurrent assets on Tri-State's consolidated statements of financial position. The cost and fair values of Tri-State's marketable securities related to the deferred compensation plans are as follows (dollars in thousands):</span></div><div style="margin-top:5pt"><table style="border-collapse:collapse;display:inline-table;margin-bottom:5pt;vertical-align:text-bottom;width:100.000%"><tr><td style="width:1.0%"></td><td style="width:45.245%"></td><td style="width:0.1%"></td><td style="width:1.0%"></td><td style="width:11.765%"></td><td style="width:0.1%"></td><td style="width:0.1%"></td><td style="width:0.530%"></td><td style="width:0.1%"></td><td style="width:1.0%"></td><td style="width:11.765%"></td><td style="width:0.1%"></td><td style="width:0.1%"></td><td style="width:0.530%"></td><td style="width:0.1%"></td><td style="width:1.0%"></td><td style="width:11.765%"></td><td style="width:0.1%"></td><td style="width:0.1%"></td><td style="width:0.530%"></td><td style="width:0.1%"></td><td style="width:1.0%"></td><td style="width:11.770%"></td><td style="width:0.1%"></td></tr><tr><td colspan="3" style="padding:0 1pt"></td><td colspan="9" style="padding:1.5pt 1pt;text-align:center;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:8pt;font-weight:700;line-height:120%">September 30, 2026</span></td><td colspan="3" style="padding:0 1pt"></td><td colspan="9" style="padding:1.5pt 1pt;text-align:center;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:8pt;font-weight:700;line-height:120%">December 31, 2025</span></td></tr><tr><td colspan="3" style="padding:0 1pt"></td><td colspan="3" style="border-top:1pt solid #000000;padding:1.5pt 1pt;text-align:center;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:8pt;font-weight:700;line-height:120%">Cost</span></td><td colspan="3" style="border-top:1pt solid #000000;padding:0 1pt"></td><td colspan="3" style="border-top:1pt solid #000000;padding:1.5pt 1pt;text-align:center;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:8pt;font-weight:700;line-height:120%">Estimated<br/>Fair Value</span></td><td colspan="3" style="padding:0 1pt"></td><td colspan="3" style="border-top:1pt solid #000000;padding:1.5pt 1pt;text-align:center;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:8pt;font-weight:700;line-height:120%">Cost</span></td><td colspan="3" style="border-top:1pt solid #000000;padding:0 1pt"></td><td colspan="3" style="border-top:1pt solid #000000;padding:1.5pt 1pt;text-align:center;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:8pt;font-weight:700;line-height:120%">Estimated<br/>Fair Value</span></td></tr><tr><td colspan="3" style="background-color:#cceeff;padding:1.5pt 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%">Deferred compensation</span></td><td style="background-color:#cceeff;border-bottom:3pt double #000000;border-top:1pt solid #000000;padding:1.5pt 0 1.5pt 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%">$</span></td><td style="background-color:#cceeff;border-bottom:3pt double #000000;border-top:1pt solid #000000;padding:1.5pt 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%">654 </span></td><td style="background-color:#cceeff;border-bottom:3pt double #000000;border-top:1pt solid #000000;padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"></td><td colspan="3" style="background-color:#cceeff;padding:0 1pt"></td><td style="background-color:#cceeff;border-bottom:3pt double #000000;border-top:1pt solid #000000;padding:1.5pt 0 1.5pt 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%">$</span></td><td style="background-color:#cceeff;border-bottom:3pt double #000000;border-top:1pt solid #000000;padding:1.5pt 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%">738 </span></td><td style="background-color:#cceeff;border-bottom:3pt double #000000;border-top:1pt solid #000000;padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"></td><td colspan="3" style="background-color:#cceeff;padding:0 1pt"></td><td style="background-color:#cceeff;border-bottom:3pt double #000000;border-top:1pt solid #000000;padding:1.5pt 0 1.5pt 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%">$</span></td><td style="background-color:#cceeff;border-bottom:3pt double #000000;border-top:1pt solid #000000;padding:1.5pt 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%">597 </span></td><td style="background-color:#cceeff;border-bottom:3pt double #000000;border-top:1pt solid #000000;padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"></td><td colspan="3" style="background-color:#cceeff;padding:0 1pt"></td><td style="background-color:#cceeff;border-bottom:3pt double #000000;border-top:1pt solid #000000;padding:1.5pt 0 1.5pt 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%">$</span></td><td style="background-color:#cceeff;border-bottom:3pt double #000000;border-top:1pt solid #000000;padding:1.5pt 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%">637 </span></td><td style="background-color:#cceeff;border-bottom:3pt double #000000;border-top:1pt solid #000000;padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"></td></tr></table></div><div style="margin-top:10pt;padding-left:18pt"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-style:italic;font-weight:400;line-height:120%">Cash Equivalents</span></div><div style="margin-top:10pt;text-indent:36pt"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%">Tri-State invests portions of its cash and cash equivalents in commercial paper, money market funds, and other highly liquid investments. The fair value of these investments approximates Tri-State's cost basis in the investments. In aggregate, the fair value was $177.0 million as of September 30, 2026 and $137.0 million as of December 31, 2025.</span></div><div style="margin-top:10pt;padding-left:18pt"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-style:italic;font-weight:400;line-height:120%">Asset Retirement and Environmental Remediation obligations</span></div><div style="margin-top:10pt;text-indent:36pt"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%">Accounting for asset retirement and environmental remediation obligations requires legal obligations associated with the retirement of long-lived assets to be recognized at fair value when incurred and capitalized as part of the related long-lived asset. In the absence of quoted market prices, Tri-State estimates the fair value of its asset retirement obligations using present value techniques, in which estimates of future cash flows associated with retirement activities are discounted using a credit-adjusted risk-free rate. Estimating the amount and timing of future expenditures includes, among other things, making projections of when assets will be retired and ultimately decommissioned, the amount of decommissioning costs, and how costs</span></div><div><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%">will escalate with inflation.</span></div><div style="margin-top:10pt;padding-left:18pt"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-style:italic;font-weight:400;line-height:120%">Debt</span></div><div style="margin-top:10pt;text-indent:36pt"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%">The fair values of long-term debt were estimated using discounted cash flow analyses based on the current incremental borrowing rates for similar types of borrowing arrangements. These valuation assumptions utilize observable inputs based on market data obtained from independent sources and are therefore considered Level 2 inputs (quoted prices for similar assets, liabilities (adjusted) and market corroborated inputs). The principal amounts and fair values of debt are as follows (dollars in thousands):</span></div><div style="margin-top:5pt"><table style="border-collapse:collapse;display:inline-table;margin-bottom:5pt;vertical-align:text-bottom;width:100.000%"><tr><td style="width:1.0%"></td><td style="width:45.245%"></td><td style="width:0.1%"></td><td style="width:1.0%"></td><td style="width:11.765%"></td><td style="width:0.1%"></td><td style="width:0.1%"></td><td style="width:0.530%"></td><td style="width:0.1%"></td><td style="width:1.0%"></td><td style="width:11.765%"></td><td style="width:0.1%"></td><td style="width:0.1%"></td><td style="width:0.530%"></td><td style="width:0.1%"></td><td style="width:1.0%"></td><td style="width:11.765%"></td><td style="width:0.1%"></td><td style="width:0.1%"></td><td style="width:0.530%"></td><td style="width:0.1%"></td><td style="width:1.0%"></td><td style="width:11.770%"></td><td style="width:0.1%"></td></tr><tr><td colspan="3" style="padding:0 1pt"></td><td colspan="9" style="padding:1.5pt 1pt;text-align:center;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:8pt;font-weight:700;line-height:120%">September 30, 2026</span></td><td colspan="3" style="padding:0 1pt"></td><td colspan="9" style="padding:1.5pt 1pt;text-align:center;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:8pt;font-weight:700;line-height:120%">December 31, 2025</span></td></tr><tr><td colspan="3" style="padding:0 1pt"></td><td colspan="3" style="border-top:1pt solid #000000;padding:1.5pt 1pt;text-align:center;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:8pt;font-weight:700;line-height:100%">Principal<br/>Amount</span></td><td colspan="3" style="border-top:1pt solid #000000;padding:0 1pt"></td><td colspan="3" style="border-top:1pt solid #000000;padding:1.5pt 1pt;text-align:center;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:8pt;font-weight:700;line-height:120%">Estimated<br/>Fair Value</span></td><td colspan="3" style="padding:0 1pt"></td><td colspan="3" style="border-top:1pt solid #000000;padding:1.5pt 1pt;text-align:center;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:8pt;font-weight:700;line-height:120%">Principal<br/>Amount</span></td><td colspan="3" style="border-top:1pt solid #000000;padding:0 1pt"></td><td colspan="3" style="border-top:1pt solid #000000;padding:1.5pt 1pt;text-align:center;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:8pt;font-weight:700;line-height:120%">Estimated<br/>Fair Value</span></td></tr><tr><td colspan="3" style="background-color:#cceeff;padding:1.5pt 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">Total long-term debt</span></td><td style="background-color:#cceeff;border-bottom:3pt double #000000;border-top:1pt solid #000000;padding:1.5pt 0 1.5pt 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">$</span></td><td style="background-color:#cceeff;border-bottom:3pt double #000000;border-top:1pt solid #000000;padding:1.5pt 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">2,937,156 </span></td><td style="background-color:#cceeff;border-bottom:3pt double #000000;border-top:1pt solid #000000;padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"></td><td colspan="3" style="background-color:#cceeff;padding:0 1pt"></td><td style="background-color:#cceeff;border-bottom:3pt double #000000;border-top:1pt solid #000000;padding:1.5pt 0 1.5pt 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">$</span></td><td style="background-color:#cceeff;border-bottom:3pt double #000000;border-top:1pt solid #000000;padding:1.5pt 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">2,647,691 </span></td><td style="background-color:#cceeff;border-bottom:3pt double #000000;border-top:1pt solid #000000;padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"></td><td colspan="3" style="background-color:#cceeff;padding:0 1pt"></td><td style="background-color:#cceeff;border-bottom:3pt double #000000;border-top:1pt solid #000000;padding:1.5pt 0 1.5pt 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">$</span></td><td style="background-color:#cceeff;border-bottom:3pt double #000000;border-top:1pt solid #000000;padding:1.5pt 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">3,188,697 </span></td><td style="background-color:#cceeff;border-bottom:3pt double #000000;border-top:1pt solid #000000;padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"></td><td colspan="3" style="background-color:#cceeff;padding:0 1pt"></td><td style="background-color:#cceeff;border-bottom:3pt double #000000;border-top:1pt solid #000000;padding:1.5pt 0 1.5pt 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">$</span></td><td style="background-color:#cceeff;border-bottom:3pt double #000000;border-top:1pt solid #000000;padding:1.5pt 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">3,068,509 </span></td><td style="background-color:#cceeff;border-bottom:3pt double #000000;border-top:1pt solid #000000;padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"></td></tr></table></div> The cost and fair values of Tri-State's marketable securities related to the executive benefit restoration plan trust are as follows (dollars in thousands):<div style="margin-top:5pt"><table style="border-collapse:collapse;display:inline-table;margin-bottom:5pt;vertical-align:text-bottom;width:100.000%"><tr><td style="width:1.0%"></td><td style="width:45.245%"></td><td style="width:0.1%"></td><td style="width:1.0%"></td><td style="width:11.765%"></td><td style="width:0.1%"></td><td style="width:0.1%"></td><td style="width:0.530%"></td><td style="width:0.1%"></td><td style="width:1.0%"></td><td style="width:11.765%"></td><td style="width:0.1%"></td><td style="width:0.1%"></td><td style="width:0.530%"></td><td style="width:0.1%"></td><td style="width:1.0%"></td><td style="width:11.765%"></td><td style="width:0.1%"></td><td style="width:0.1%"></td><td style="width:0.530%"></td><td style="width:0.1%"></td><td style="width:1.0%"></td><td style="width:11.770%"></td><td style="width:0.1%"></td></tr><tr><td colspan="3" style="padding:0 1pt"></td><td colspan="9" style="padding:1.5pt 1pt;text-align:center;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:8pt;font-weight:700;line-height:120%">September 30, 2026</span></td><td colspan="3" style="padding:0 1pt"></td><td colspan="9" style="padding:1.5pt 1pt;text-align:center;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:8pt;font-weight:700;line-height:120%">December 31, 2025</span></td></tr><tr><td colspan="3" style="padding:0 1pt"></td><td colspan="3" style="border-top:1pt solid #000000;padding:1.5pt 1pt;text-align:center;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:8pt;font-weight:700;line-height:120%">Cost</span></td><td colspan="3" style="border-top:1pt solid #000000;padding:0 1pt"></td><td colspan="3" style="border-top:1pt solid #000000;padding:1.5pt 1pt;text-align:center;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:8pt;font-weight:700;line-height:120%">Estimated<br/>Fair Value</span></td><td colspan="3" style="padding:0 1pt"></td><td colspan="3" style="border-top:1pt solid #000000;padding:1.5pt 1pt;text-align:center;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:8pt;font-weight:700;line-height:120%">Cost</span></td><td colspan="3" style="border-top:1pt solid #000000;padding:0 1pt"></td><td colspan="3" style="border-top:1pt solid #000000;padding:1.5pt 1pt;text-align:center;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:8pt;font-weight:700;line-height:120%">Estimated<br/>Fair Value</span></td></tr><tr><td colspan="3" style="background-color:#cceeff;padding:1.5pt 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%">Executive benefit restoration plan trust</span></td><td style="background-color:#cceeff;border-top:1pt solid #000000;padding:1.5pt 0 1.5pt 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%">$</span></td><td style="background-color:#cceeff;border-top:1pt solid #000000;padding:1.5pt 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%">10,609 </span></td><td style="background-color:#cceeff;border-top:1pt solid #000000;padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"></td><td colspan="3" style="background-color:#cceeff;padding:0 1pt"></td><td style="background-color:#cceeff;border-top:1pt solid #000000;padding:1.5pt 0 1.5pt 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%">$</span></td><td style="background-color:#cceeff;border-top:1pt solid #000000;padding:1.5pt 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%">10,395 </span></td><td style="background-color:#cceeff;border-top:1pt solid #000000;padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"></td><td colspan="3" style="background-color:#cceeff;padding:0 1pt"></td><td style="background-color:#cceeff;border-top:1pt solid #000000;padding:1.5pt 0 1.5pt 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%">$</span></td><td style="background-color:#cceeff;border-top:1pt solid #000000;padding:1.5pt 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%">10,337 </span></td><td style="background-color:#cceeff;border-top:1pt solid #000000;padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"></td><td colspan="3" style="background-color:#cceeff;padding:0 1pt"></td><td style="background-color:#cceeff;border-top:1pt solid #000000;padding:1.5pt 0 1.5pt 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%">$</span></td><td style="background-color:#cceeff;border-top:1pt solid #000000;padding:1.5pt 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%">10,360 </span></td><td style="background-color:#cceeff;border-top:1pt solid #000000;padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"></td></tr></table></div>The cost and fair values of Tri-State's marketable securities related to the deferred compensation plans are as follows (dollars in thousands):<div style="margin-top:5pt"><table style="border-collapse:collapse;display:inline-table;margin-bottom:5pt;vertical-align:text-bottom;width:100.000%"><tr><td style="width:1.0%"></td><td style="width:45.245%"></td><td style="width:0.1%"></td><td style="width:1.0%"></td><td style="width:11.765%"></td><td style="width:0.1%"></td><td style="width:0.1%"></td><td style="width:0.530%"></td><td style="width:0.1%"></td><td style="width:1.0%"></td><td style="width:11.765%"></td><td style="width:0.1%"></td><td style="width:0.1%"></td><td style="width:0.530%"></td><td style="width:0.1%"></td><td style="width:1.0%"></td><td style="width:11.765%"></td><td style="width:0.1%"></td><td style="width:0.1%"></td><td style="width:0.530%"></td><td style="width:0.1%"></td><td style="width:1.0%"></td><td style="width:11.770%"></td><td style="width:0.1%"></td></tr><tr><td colspan="3" style="padding:0 1pt"></td><td colspan="9" style="padding:1.5pt 1pt;text-align:center;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:8pt;font-weight:700;line-height:120%">September 30, 2026</span></td><td colspan="3" style="padding:0 1pt"></td><td colspan="9" style="padding:1.5pt 1pt;text-align:center;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:8pt;font-weight:700;line-height:120%">December 31, 2025</span></td></tr><tr><td colspan="3" style="padding:0 1pt"></td><td colspan="3" style="border-top:1pt solid #000000;padding:1.5pt 1pt;text-align:center;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:8pt;font-weight:700;line-height:120%">Cost</span></td><td colspan="3" style="border-top:1pt solid #000000;padding:0 1pt"></td><td colspan="3" style="border-top:1pt solid #000000;padding:1.5pt 1pt;text-align:center;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:8pt;font-weight:700;line-height:120%">Estimated<br/>Fair Value</span></td><td colspan="3" style="padding:0 1pt"></td><td colspan="3" style="border-top:1pt solid #000000;padding:1.5pt 1pt;text-align:center;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:8pt;font-weight:700;line-height:120%">Cost</span></td><td colspan="3" style="border-top:1pt solid #000000;padding:0 1pt"></td><td colspan="3" style="border-top:1pt solid #000000;padding:1.5pt 1pt;text-align:center;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:8pt;font-weight:700;line-height:120%">Estimated<br/>Fair Value</span></td></tr><tr><td colspan="3" style="background-color:#cceeff;padding:1.5pt 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%">Deferred compensation</span></td><td style="background-color:#cceeff;border-bottom:3pt double #000000;border-top:1pt solid #000000;padding:1.5pt 0 1.5pt 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%">$</span></td><td style="background-color:#cceeff;border-bottom:3pt double #000000;border-top:1pt solid #000000;padding:1.5pt 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%">654 </span></td><td style="background-color:#cceeff;border-bottom:3pt double #000000;border-top:1pt solid #000000;padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"></td><td colspan="3" style="background-color:#cceeff;padding:0 1pt"></td><td style="background-color:#cceeff;border-bottom:3pt double #000000;border-top:1pt solid #000000;padding:1.5pt 0 1.5pt 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%">$</span></td><td style="background-color:#cceeff;border-bottom:3pt double #000000;border-top:1pt solid #000000;padding:1.5pt 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%">738 </span></td><td style="background-color:#cceeff;border-bottom:3pt double #000000;border-top:1pt solid #000000;padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"></td><td colspan="3" style="background-color:#cceeff;padding:0 1pt"></td><td style="background-color:#cceeff;border-bottom:3pt double #000000;border-top:1pt solid #000000;padding:1.5pt 0 1.5pt 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%">$</span></td><td style="background-color:#cceeff;border-bottom:3pt double #000000;border-top:1pt solid #000000;padding:1.5pt 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%">597 </span></td><td style="background-color:#cceeff;border-bottom:3pt double #000000;border-top:1pt solid #000000;padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"></td><td colspan="3" style="background-color:#cceeff;padding:0 1pt"></td><td style="background-color:#cceeff;border-bottom:3pt double #000000;border-top:1pt solid #000000;padding:1.5pt 0 1.5pt 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%">$</span></td><td style="background-color:#cceeff;border-bottom:3pt double #000000;border-top:1pt solid #000000;padding:1.5pt 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%">637 </span></td><td style="background-color:#cceeff;border-bottom:3pt double #000000;border-top:1pt solid #000000;padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"></td></tr></table></div>The principal amounts and fair values of debt are as follows (dollars in thousands):<div style="margin-top:5pt"><table style="border-collapse:collapse;display:inline-table;margin-bottom:5pt;vertical-align:text-bottom;width:100.000%"><tr><td style="width:1.0%"></td><td style="width:45.245%"></td><td style="width:0.1%"></td><td style="width:1.0%"></td><td style="width:11.765%"></td><td style="width:0.1%"></td><td style="width:0.1%"></td><td style="width:0.530%"></td><td style="width:0.1%"></td><td style="width:1.0%"></td><td style="width:11.765%"></td><td style="width:0.1%"></td><td style="width:0.1%"></td><td style="width:0.530%"></td><td style="width:0.1%"></td><td style="width:1.0%"></td><td style="width:11.765%"></td><td style="width:0.1%"></td><td style="width:0.1%"></td><td style="width:0.530%"></td><td style="width:0.1%"></td><td style="width:1.0%"></td><td style="width:11.770%"></td><td style="width:0.1%"></td></tr><tr><td colspan="3" style="padding:0 1pt"></td><td colspan="9" style="padding:1.5pt 1pt;text-align:center;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:8pt;font-weight:700;line-height:120%">September 30, 2026</span></td><td colspan="3" style="padding:0 1pt"></td><td colspan="9" style="padding:1.5pt 1pt;text-align:center;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:8pt;font-weight:700;line-height:120%">December 31, 2025</span></td></tr><tr><td colspan="3" style="padding:0 1pt"></td><td colspan="3" style="border-top:1pt solid #000000;padding:1.5pt 1pt;text-align:center;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:8pt;font-weight:700;line-height:100%">Principal<br/>Amount</span></td><td colspan="3" style="border-top:1pt solid #000000;padding:0 1pt"></td><td colspan="3" style="border-top:1pt solid #000000;padding:1.5pt 1pt;text-align:center;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:8pt;font-weight:700;line-height:120%">Estimated<br/>Fair Value</span></td><td colspan="3" style="padding:0 1pt"></td><td colspan="3" style="border-top:1pt solid #000000;padding:1.5pt 1pt;text-align:center;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:8pt;font-weight:700;line-height:120%">Principal<br/>Amount</span></td><td colspan="3" style="border-top:1pt solid #000000;padding:0 1pt"></td><td colspan="3" style="border-top:1pt solid #000000;padding:1.5pt 1pt;text-align:center;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:8pt;font-weight:700;line-height:120%">Estimated<br/>Fair Value</span></td></tr><tr><td colspan="3" style="background-color:#cceeff;padding:1.5pt 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">Total long-term debt</span></td><td style="background-color:#cceeff;border-bottom:3pt double #000000;border-top:1pt solid #000000;padding:1.5pt 0 1.5pt 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">$</span></td><td style="background-color:#cceeff;border-bottom:3pt double #000000;border-top:1pt solid #000000;padding:1.5pt 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">2,937,156 </span></td><td style="background-color:#cceeff;border-bottom:3pt double #000000;border-top:1pt solid #000000;padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"></td><td colspan="3" style="background-color:#cceeff;padding:0 1pt"></td><td style="background-color:#cceeff;border-bottom:3pt double #000000;border-top:1pt solid #000000;padding:1.5pt 0 1.5pt 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">$</span></td><td style="background-color:#cceeff;border-bottom:3pt double #000000;border-top:1pt solid #000000;padding:1.5pt 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">2,647,691 </span></td><td style="background-color:#cceeff;border-bottom:3pt double #000000;border-top:1pt solid #000000;padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"></td><td colspan="3" style="background-color:#cceeff;padding:0 1pt"></td><td style="background-color:#cceeff;border-bottom:3pt double #000000;border-top:1pt solid #000000;padding:1.5pt 0 1.5pt 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">$</span></td><td style="background-color:#cceeff;border-bottom:3pt double #000000;border-top:1pt solid #000000;padding:1.5pt 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">3,188,697 </span></td><td style="background-color:#cceeff;border-bottom:3pt double #000000;border-top:1pt solid #000000;padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"></td><td colspan="3" style="background-color:#cceeff;padding:0 1pt"></td><td style="background-color:#cceeff;border-bottom:3pt double #000000;border-top:1pt solid #000000;padding:1.5pt 0 1.5pt 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">$</span></td><td style="background-color:#cceeff;border-bottom:3pt double #000000;border-top:1pt solid #000000;padding:1.5pt 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">3,068,509 </span></td><td style="background-color:#cceeff;border-bottom:3pt double #000000;border-top:1pt solid #000000;padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"></td></tr></table></div> 10609000 10395000 10337000 10360000 654000 738000 597000 637000 177000000.0 137000000.0 2937156000 2647691000 3188697000 3068509000 VARIABLE INTEREST ENTITIES<div style="margin-top:10pt;text-indent:36pt"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%">The following is a description of Tri-State's financial interests in variable interest entities that it considers significant. This includes an entity for which Tri-State is determined to be the primary beneficiary and therefore consolidate.</span></div><div style="margin-top:10pt;padding-left:18pt"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-style:italic;font-weight:400;line-height:120%">Consolidated Variable Interest Entity</span></div><div style="margin-top:10pt;text-indent:36pt"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:700;line-height:120%">Springerville Partnership:</span><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%"> Tri-State owns a 51 percent equity interest, including the 1 percent general partner equity interest, in the Springerville Partnership, which is the 100 percent owner of Springerville Unit 3 Holding LLC (“Owner Lessor”). The Owner Lessor is the owner of Springerville Unit 3. Tri-State, as general partner of the Springerville Partnership, </span></div><div style="margin-top:10pt"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%">has the full, exclusive and complete right, power and discretion to operate, manage and control the affairs of the Springerville Partnership and take certain actions necessary to maintain the Springerville Partnership in good standing without the consent of the limited partners. Additionally, the Owner Lessor has historically not demonstrated an ability to finance its activities without additional financial support. The financial support is provided by Tri-State's remittance of lease payments in order to permit the Owner Lessor, the holder of the Springerville Unit 3 assets, to pay the debt obligations and equity returns of the Springerville Partnership. Tri-State has the primary risk (expense) exposure in operating the Springerville Unit 3 assets and is responsible for 100 percent of the operation, maintenance and capital expenditures of Springerville Unit 3 and the decisions related to those expenditures including budgeting, financing and dispatch of power. Based on all these facts, it was determined that Tri-State is the primary beneficiary of the Owner Lessor. Therefore, the Springerville Partnership and Owner Lessor have been consolidated by Tri-State.</span></div><div style="margin-top:10pt;text-indent:36pt"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%">Assets and liabilities of the Springerville Partnership that are included in Tri-State's consolidated statements of financial position are as follows (dollars in thousands):</span></div><div style="margin-top:5pt"><table style="border-collapse:collapse;display:inline-table;margin-bottom:5pt;vertical-align:text-bottom;width:100.000%"><tr><td style="width:1.0%"></td><td style="width:64.543%"></td><td style="width:0.1%"></td><td style="width:1.0%"></td><td style="width:15.712%"></td><td style="width:0.1%"></td><td style="width:0.1%"></td><td style="width:0.530%"></td><td style="width:0.1%"></td><td style="width:1.0%"></td><td style="width:15.715%"></td><td style="width:0.1%"></td></tr><tr><td colspan="3" style="padding:0 1pt"></td><td colspan="3" style="padding:1.5pt 1pt;text-align:center;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:700;line-height:100%">September 30,<br/>2026</span></td><td colspan="3" style="padding:0 1pt"></td><td colspan="3" style="padding:1.5pt 1pt;text-align:center;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:700;line-height:100%">December 31,<br/>2025</span></td></tr><tr><td colspan="3" style="background-color:#cceeff;padding:1.5pt 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%">Net electric plant</span></td><td style="background-color:#cceeff;border-top:1pt solid #000000;padding:1.5pt 0 1.5pt 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%">$</span></td><td style="background-color:#cceeff;border-top:1pt solid #000000;padding:1.5pt 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%">605,335 </span></td><td style="background-color:#cceeff;border-top:1pt solid #000000;padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"></td><td colspan="3" style="background-color:#cceeff;padding:0 1pt"></td><td style="background-color:#cceeff;border-top:1pt solid #000000;padding:1.5pt 0 1.5pt 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%">$</span></td><td style="background-color:#cceeff;border-top:1pt solid #000000;padding:1.5pt 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%">635,777 </span></td><td style="background-color:#cceeff;border-top:1pt solid #000000;padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"></td></tr><tr><td colspan="3" style="padding:1.5pt 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%">Noncontrolling interest</span></td><td colspan="2" style="padding:1.5pt 0 1.5pt 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%">129,358 </span></td><td style="padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"></td><td colspan="3" style="padding:0 1pt"></td><td colspan="2" style="padding:1.5pt 0 1.5pt 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%">130,132 </span></td><td style="padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"></td></tr><tr><td colspan="3" style="background-color:#cceeff;padding:1.5pt 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%">Long-term debt</span></td><td colspan="2" style="background-color:#cceeff;padding:1.5pt 0 1.5pt 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%">171,657 </span></td><td style="background-color:#cceeff;padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"></td><td colspan="3" style="background-color:#cceeff;padding:0 1pt"></td><td colspan="2" style="background-color:#cceeff;padding:1.5pt 0 1.5pt 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%">172,158 </span></td><td style="background-color:#cceeff;padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"></td></tr><tr><td colspan="3" style="padding:1.5pt 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%">Accrued interest</span></td><td colspan="2" style="padding:1.5pt 0 1.5pt 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%">1,999 </span></td><td style="padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"></td><td colspan="3" style="padding:0 1pt"></td><td colspan="2" style="padding:1.5pt 0 1.5pt 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%">4,997 </span></td><td style="padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"></td></tr></table></div><div style="margin-top:10pt;text-indent:36pt"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%">Tri-State's consolidated statements of operations include the following Springerville Partnership expenses for the three and nine months ended September 30, 2026 and 2025 (dollars in thousands):</span></div><div style="margin-top:5pt"><table style="border-collapse:collapse;display:inline-table;margin-bottom:5pt;vertical-align:text-bottom;width:100.000%"><tr><td style="width:1.0%"></td><td style="width:44.660%"></td><td style="width:0.1%"></td><td style="width:1.0%"></td><td style="width:11.911%"></td><td style="width:0.1%"></td><td style="width:0.1%"></td><td style="width:0.530%"></td><td style="width:0.1%"></td><td style="width:1.0%"></td><td style="width:11.911%"></td><td style="width:0.1%"></td><td style="width:0.1%"></td><td style="width:0.530%"></td><td style="width:0.1%"></td><td style="width:1.0%"></td><td style="width:11.911%"></td><td style="width:0.1%"></td><td style="width:0.1%"></td><td style="width:0.530%"></td><td style="width:0.1%"></td><td style="width:1.0%"></td><td style="width:11.917%"></td><td style="width:0.1%"></td></tr><tr><td colspan="3" style="padding:0 1pt"></td><td colspan="9" style="padding:1.5pt 1pt;text-align:center;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:700;line-height:100%">Three Months Ended September 30,</span></td><td colspan="3" style="padding:0 1pt"></td><td colspan="9" style="padding:1.5pt 1pt;text-align:center;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:700;line-height:100%">Nine Months Ended September 30,</span></td></tr><tr><td colspan="3" style="padding:0 1pt"></td><td colspan="3" style="padding:1.5pt 1pt;text-align:center;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:700;line-height:100%">2026</span></td><td colspan="3" style="padding:0 1pt"></td><td colspan="3" style="padding:1.5pt 1pt;text-align:center;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:700;line-height:100%">2025</span></td><td colspan="3" style="padding:0 1pt"></td><td colspan="3" style="padding:1.5pt 1pt;text-align:center;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:700;line-height:100%">2026</span></td><td colspan="3" style="padding:0 1pt"></td><td colspan="3" style="padding:1.5pt 1pt;text-align:center;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:700;line-height:100%">2025</span></td></tr><tr><td colspan="3" style="background-color:#cceeff;padding:1.5pt 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">Depreciation, amortization and depletion</span></td><td style="background-color:#cceeff;border-top:1pt solid #000000;padding:1.5pt 0 1.5pt 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">$</span></td><td style="background-color:#cceeff;border-top:1pt solid #000000;padding:1.5pt 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">10,147 </span></td><td style="background-color:#cceeff;border-top:1pt solid #000000;padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"></td><td colspan="3" style="background-color:#cceeff;padding:0 1pt"></td><td style="background-color:#cceeff;border-top:1pt solid #000000;padding:1.5pt 0 1.5pt 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">$</span></td><td style="background-color:#cceeff;border-top:1pt solid #000000;padding:1.5pt 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">10,147 </span></td><td style="background-color:#cceeff;border-top:1pt solid #000000;padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"></td><td colspan="3" style="background-color:#cceeff;padding:0 1pt"></td><td style="background-color:#cceeff;border-top:1pt solid #000000;padding:1.5pt 0 1.5pt 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">$</span></td><td style="background-color:#cceeff;border-top:1pt solid #000000;padding:1.5pt 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">30,442 </span></td><td style="background-color:#cceeff;border-top:1pt solid #000000;padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"></td><td colspan="3" style="background-color:#cceeff;padding:0 1pt"></td><td style="background-color:#cceeff;border-top:1pt solid #000000;padding:1.5pt 0 1.5pt 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">$</span></td><td style="background-color:#cceeff;border-top:1pt solid #000000;padding:1.5pt 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">30,442 </span></td><td style="background-color:#cceeff;border-top:1pt solid #000000;padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"></td></tr><tr><td colspan="3" style="padding:1.5pt 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">Interest</span></td><td colspan="2" style="padding:1.5pt 0 1.5pt 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">2,828 </span></td><td style="padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"></td><td colspan="3" style="padding:0 1pt"></td><td colspan="2" style="padding:1.5pt 0 1.5pt 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">2,839 </span></td><td style="padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"></td><td colspan="3" style="padding:0 1pt"></td><td colspan="2" style="padding:1.5pt 0 1.5pt 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">8,493 </span></td><td style="padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"></td><td colspan="3" style="padding:0 1pt"></td><td colspan="2" style="padding:1.5pt 0 1.5pt 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">8,525 </span></td><td style="padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"></td></tr></table></div><div style="margin-top:10pt;text-indent:36pt"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%">The revenue associated with the Springerville Partnership lease has been eliminated in consolidation. Income, losses and cash flows of the Springerville Partnership are allocated to the general and limited partners based on their equity ownership percentages. The net income or loss attributable to the 49 percent non-controlling equity interest in the Springerville Partnership is reflected on Tri-State's consolidated statements of operations.</span></div> 0.51 0.01 1 1 <div style="margin-top:10pt;text-indent:36pt"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%">Assets and liabilities of the Springerville Partnership that are included in Tri-State's consolidated statements of financial position are as follows (dollars in thousands):</span></div><div style="margin-top:5pt"><table style="border-collapse:collapse;display:inline-table;margin-bottom:5pt;vertical-align:text-bottom;width:100.000%"><tr><td style="width:1.0%"></td><td style="width:64.543%"></td><td style="width:0.1%"></td><td style="width:1.0%"></td><td style="width:15.712%"></td><td style="width:0.1%"></td><td style="width:0.1%"></td><td style="width:0.530%"></td><td style="width:0.1%"></td><td style="width:1.0%"></td><td style="width:15.715%"></td><td style="width:0.1%"></td></tr><tr><td colspan="3" style="padding:0 1pt"></td><td colspan="3" style="padding:1.5pt 1pt;text-align:center;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:700;line-height:100%">September 30,<br/>2026</span></td><td colspan="3" style="padding:0 1pt"></td><td colspan="3" style="padding:1.5pt 1pt;text-align:center;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:700;line-height:100%">December 31,<br/>2025</span></td></tr><tr><td colspan="3" style="background-color:#cceeff;padding:1.5pt 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%">Net electric plant</span></td><td style="background-color:#cceeff;border-top:1pt solid #000000;padding:1.5pt 0 1.5pt 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%">$</span></td><td style="background-color:#cceeff;border-top:1pt solid #000000;padding:1.5pt 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%">605,335 </span></td><td style="background-color:#cceeff;border-top:1pt solid #000000;padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"></td><td colspan="3" style="background-color:#cceeff;padding:0 1pt"></td><td style="background-color:#cceeff;border-top:1pt solid #000000;padding:1.5pt 0 1.5pt 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%">$</span></td><td style="background-color:#cceeff;border-top:1pt solid #000000;padding:1.5pt 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%">635,777 </span></td><td style="background-color:#cceeff;border-top:1pt solid #000000;padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"></td></tr><tr><td colspan="3" style="padding:1.5pt 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%">Noncontrolling interest</span></td><td colspan="2" style="padding:1.5pt 0 1.5pt 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%">129,358 </span></td><td style="padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"></td><td colspan="3" style="padding:0 1pt"></td><td colspan="2" style="padding:1.5pt 0 1.5pt 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%">130,132 </span></td><td style="padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"></td></tr><tr><td colspan="3" style="background-color:#cceeff;padding:1.5pt 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%">Long-term debt</span></td><td colspan="2" style="background-color:#cceeff;padding:1.5pt 0 1.5pt 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%">171,657 </span></td><td style="background-color:#cceeff;padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"></td><td colspan="3" style="background-color:#cceeff;padding:0 1pt"></td><td colspan="2" style="background-color:#cceeff;padding:1.5pt 0 1.5pt 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%">172,158 </span></td><td style="background-color:#cceeff;padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"></td></tr><tr><td colspan="3" style="padding:1.5pt 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%">Accrued interest</span></td><td colspan="2" style="padding:1.5pt 0 1.5pt 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%">1,999 </span></td><td style="padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"></td><td colspan="3" style="padding:0 1pt"></td><td colspan="2" style="padding:1.5pt 0 1.5pt 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%">4,997 </span></td><td style="padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"></td></tr></table></div><div style="margin-top:10pt;text-indent:36pt"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%">Tri-State's consolidated statements of operations include the following Springerville Partnership expenses for the three and nine months ended September 30, 2026 and 2025 (dollars in thousands):</span></div><div style="margin-top:5pt"><table style="border-collapse:collapse;display:inline-table;margin-bottom:5pt;vertical-align:text-bottom;width:100.000%"><tr><td style="width:1.0%"></td><td style="width:44.660%"></td><td style="width:0.1%"></td><td style="width:1.0%"></td><td style="width:11.911%"></td><td style="width:0.1%"></td><td style="width:0.1%"></td><td style="width:0.530%"></td><td style="width:0.1%"></td><td style="width:1.0%"></td><td style="width:11.911%"></td><td style="width:0.1%"></td><td style="width:0.1%"></td><td style="width:0.530%"></td><td style="width:0.1%"></td><td style="width:1.0%"></td><td style="width:11.911%"></td><td style="width:0.1%"></td><td style="width:0.1%"></td><td style="width:0.530%"></td><td style="width:0.1%"></td><td style="width:1.0%"></td><td style="width:11.917%"></td><td style="width:0.1%"></td></tr><tr><td colspan="3" style="padding:0 1pt"></td><td colspan="9" style="padding:1.5pt 1pt;text-align:center;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:700;line-height:100%">Three Months Ended September 30,</span></td><td colspan="3" style="padding:0 1pt"></td><td colspan="9" style="padding:1.5pt 1pt;text-align:center;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:700;line-height:100%">Nine Months Ended September 30,</span></td></tr><tr><td colspan="3" style="padding:0 1pt"></td><td colspan="3" style="padding:1.5pt 1pt;text-align:center;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:700;line-height:100%">2026</span></td><td colspan="3" style="padding:0 1pt"></td><td colspan="3" style="padding:1.5pt 1pt;text-align:center;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:700;line-height:100%">2025</span></td><td colspan="3" style="padding:0 1pt"></td><td colspan="3" style="padding:1.5pt 1pt;text-align:center;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:700;line-height:100%">2026</span></td><td colspan="3" style="padding:0 1pt"></td><td colspan="3" style="padding:1.5pt 1pt;text-align:center;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:700;line-height:100%">2025</span></td></tr><tr><td colspan="3" style="background-color:#cceeff;padding:1.5pt 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">Depreciation, amortization and depletion</span></td><td style="background-color:#cceeff;border-top:1pt solid #000000;padding:1.5pt 0 1.5pt 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">$</span></td><td style="background-color:#cceeff;border-top:1pt solid #000000;padding:1.5pt 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">10,147 </span></td><td style="background-color:#cceeff;border-top:1pt solid #000000;padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"></td><td colspan="3" style="background-color:#cceeff;padding:0 1pt"></td><td style="background-color:#cceeff;border-top:1pt solid #000000;padding:1.5pt 0 1.5pt 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">$</span></td><td style="background-color:#cceeff;border-top:1pt solid #000000;padding:1.5pt 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">10,147 </span></td><td style="background-color:#cceeff;border-top:1pt solid #000000;padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"></td><td colspan="3" style="background-color:#cceeff;padding:0 1pt"></td><td style="background-color:#cceeff;border-top:1pt solid #000000;padding:1.5pt 0 1.5pt 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">$</span></td><td style="background-color:#cceeff;border-top:1pt solid #000000;padding:1.5pt 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">30,442 </span></td><td style="background-color:#cceeff;border-top:1pt solid #000000;padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"></td><td colspan="3" style="background-color:#cceeff;padding:0 1pt"></td><td style="background-color:#cceeff;border-top:1pt solid #000000;padding:1.5pt 0 1.5pt 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">$</span></td><td style="background-color:#cceeff;border-top:1pt solid #000000;padding:1.5pt 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">30,442 </span></td><td style="background-color:#cceeff;border-top:1pt solid #000000;padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"></td></tr><tr><td colspan="3" style="padding:1.5pt 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">Interest</span></td><td colspan="2" style="padding:1.5pt 0 1.5pt 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">2,828 </span></td><td style="padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"></td><td colspan="3" style="padding:0 1pt"></td><td colspan="2" style="padding:1.5pt 0 1.5pt 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">2,839 </span></td><td style="padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"></td><td colspan="3" style="padding:0 1pt"></td><td colspan="2" style="padding:1.5pt 0 1.5pt 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">8,493 </span></td><td style="padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"></td><td colspan="3" style="padding:0 1pt"></td><td colspan="2" style="padding:1.5pt 0 1.5pt 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">8,525 </span></td><td style="padding:1.5pt 1pt 1.5pt 0;text-align:right;vertical-align:bottom"></td></tr></table></div> 605335000 635777000 129358000 130132000 171657000 172158000 1999000 4997000 10147000 10147000 30442000 30442000 2828000 2839000 8493000 8525000 0.49 LEGAL<div style="margin-top:10pt;text-indent:36pt"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%">Other than as disclosed be</span><span style="background-color:#ffffff;color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%">low or in Tri-State's annual report on Form 10-K for the year ended December 31, 2025 filed with the SEC, Tri-State does not expect any litigation or proceeding pending or threatened against it to have a potential material effect on its financial condition, results of operations or cash flows.</span></div><div style="margin-top:10pt;text-indent:36pt"><span style="background-color:#ffffff;color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-style:italic;font-weight:400;line-height:120%">NRPPD Section 206 Complaint:</span><span style="background-color:#ffffff;color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%"> On March 25, 2024, Northwest Rural Public Power District ("NRPPD") filed a Federal Power Act ("FPA") section 206 proceeding with FERC, Docket No. EL24-93, against Tri-State and Basin Electric Power Cooperative ("Basin") asking FERC to exercise primary jurisdiction over the interpretation of FERC's December 19, 2023 order related to Tri-State's contract termination payment tariff and Tri-State's Amended and Restated Wholesale Power Contract for the Eastern Interconnection with Basin ("Basin Eastern WPC"). In particular, NRPPD requested that FERC hold that NRPPD’s withdrawal from Tri-State is permissible under the Basin Eastern WPC and that NRPPD’s contract termination payment calculation is the appropriate contract termination payment. On December 5, 2024, FERC issued an order denying NRPPD's complaint because NRPPD failed to satisfy its burden under FPA section 206. FERC's order also determined that NRPPD's withdrawal from Tri-State does not cause a breach of the Basin Eastern WPC ("FERC NRPPD Order"). On February 13, 2025, Basin filed a petition for review of the FERC NRPPD Order, Case No. 25-1060, with the United States Court of Appeals for the District of Columbia Circuit ("DC Circuit Court of Appeals"). On March 17, 2025, Tri-State filed a notice of intervention in Basin's petition for review.</span><span style="background-color:#ffffff;color:#181818;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%"> On October 2, 2026, the </span><span style="background-color:#ffffff;color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%">DC Circuit Court of Appeals</span><span style="background-color:#ffffff;color:#181818;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%"> issued an opinion denying Basin's petitions for review and affirming FERC's determination that </span><span style="background-color:#ffffff;color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%">NRPPD's withdrawal from Tri-State does not cause a breach of the Basin Eastern WPC.</span></div><div style="margin-top:10pt;text-indent:36pt"><span style="background-color:#ffffff;color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-style:italic;font-weight:400;line-height:120%">Las Tusas Fire. </span><span style="background-color:#ffffff;color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%">In the first quarter of 2026, Tri-State was added as a co-defendant to an existing lawsuit against its Utility Member, Mora San Miguel Electric Cooperative, I</span><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%">nc. (“MSMEC”), relating to the Las Tusas fire that occurred in May 2023 in San Miguel County, New Mexico. Tri-State’s operations, assets or personnel are not alleged to be the cause of the fire. </span></div><div style="margin-top:10pt"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%">Rather, it is alleged that MSMEC’s facilities started the fire and that Tri-State had influence over or oversight of MSMEC’s activitie</span><span style="background-color:#ffffff;color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%">s. Tri-State filed an answer to the amended complaint on May 20, 2026. Tri-S</span><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%">tate plans a vigorous defense in close coordination with its insurance carrier and with primary defense costs covered by insurance. It is not possible to predict the outcome of this matter or whether Tri-State will incur any resulting liability.</span></div> false false false false