| Schedule of property and equipment, net |
| | | | | | | | | | | | | | | | June 30, 2026 | | December 31, 2025 | | | | (in thousands) | Machinery and equipment | | $ | 574,611 | | $ | 561,560 | Gathering and disposal infrastructure | | | 466,695 | | | 418,044 | Pipelines | | | 262,302 | | | 226,303 | Recycling facilities | | | 184,521 | | | 168,714 | Buildings and leasehold improvements | | | 115,444 | | | 108,872 | Land | | | 54,931 | | | 46,412 | Computer equipment and software | | | 7,796 | | | 8,260 | Vehicles and equipment | | | 5,335 | | | 7,247 | Machinery and equipment - finance lease | | | 3,137 | | | 3,137 | Office furniture and equipment | | | 1,208 | | | 1,213 | Computer equipment and software - finance lease | | | 815 | | | 824 | Construction in progress | | | 119,771 | | | 78,820 | | | | 1,796,566 | | | 1,629,406 | Less accumulated depreciation(1) | | | (770,358) | | | (717,223) | Total property and equipment, net | | $ | 1,026,208 | | $ | 912,183 |
| (1) | Includes $1.9 million and $1.6 million of accumulated depreciation related to finance leases as of June 30, 2026 and December 31, 2025, respectively. |
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| Schedule of amortization and depreciation expenses |
| | | | | | | | | | | | | | | | Three months ended June 30, | | Six months ended June 30, | | | | 2026 | | 2025 | | 2026 | | 2025 | | | | | (in thousands) | | Category | | | | | | | | | | | | | | Depreciation expense from property and equipment | | $ | 42,561 | | $ | 37,376 | | $ | 83,602 | | $ | 71,420 | | Amortization expense from finance leases | | | 180 | | | 182 | | | 361 | | | 351 | | Amortization expense from intangible assets | | | 4,386 | | | 4,378 | | | 8,765 | | | 8,756 | | Accretion expense from asset retirement obligations | | | 1,307 | | | 1,036 | | | 2,569 | | | 2,045 | | Total depreciation, amortization and accretion | | $ | 48,434 | | $ | 42,972 | | $ | 95,297 | | $ | 82,572 | |
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