v3.26.3
Consolidated Statements of Financial Position - USD ($)
$ in Thousands
Sep. 30, 2026
Dec. 31, 2025
Electric plant    
In service $ 6,149,506 $ 6,075,291
Construction work in progress 197,543 143,940
Total electric plant 6,347,049 6,219,231
Less allowances for depreciation and amortization (3,005,440) (2,913,707)
Net electric plant 3,341,609 3,305,524
Other plant 804,945 853,410
Less allowances for depreciation, amortization and depletion (725,089) (760,477)
Net other plant 79,856 92,933
Total property, plant and equipment 3,421,465 3,398,457
Other assets and investments    
Investments in other associations 193,696 194,825
Investments in and advances to coal mines 1,138 1,533
Restricted cash and investments 1,468 2,137
Intangible assets, net 166,925 157,915
Other noncurrent assets 12,380 14,674
Total other assets and investments 375,607 371,084
Current assets    
Cash and cash equivalents 218,696 177,557
Restricted cash and investments 17,940 1,111
Deposits and advances 34,749 32,620
Accounts receivable—Utility Members 94,592 83,743
Other accounts receivable 77,059 32,892
Coal inventory 91,194 124,170
Materials and supplies 105,018 109,146
Total current assets 639,248 561,239
Deferred charges    
Regulatory assets 824,285 853,834
Deferred Income Tax Assets, Net 3,503 0
Other 55,169 58,546
Total deferred charges 882,957 912,380
Total assets 5,319,277 5,243,160
Capitalization    
Patronage capital equity 891,660 917,276
Accumulated other comprehensive loss 1,285 1,545
Noncontrolling interest 129,358 130,132
Total equity 1,022,303 1,048,953
Long-term debt 2,859,974 3,093,216
Total capitalization 3,882,277 4,142,169
Current liabilities    
Utility Member advances 19,965 10,383
Accounts payable 201,994 129,552
Short-term borrowings 181,862 100
Accrued expenses 17,440 28,717
Current asset retirement and environmental remediation obligations 119,979 136,501
Accrued interest 41,912 22,632
Accrued property taxes 30,087 33,505
Current maturities of long-term debt 61,879 80,052
Total current liabilities 675,118 441,442
Deferred credits and other liabilities    
Regulatory liabilities 510,741 358,446
Deferred income tax liability 0 (254)
Asset retirement and environmental remediation obligations 167,842 200,267
Other 73,544 91,880
Total deferred credits and other liabilities 752,127 650,339
Accumulated postretirement benefit and postemployment obligations 9,755 9,210
Total equity and liabilities $ 5,319,277 $ 5,243,160