| PROPERTY, PLANT AND EQUIPMENT |
NOTE 4—PROPERTY, PLANT AND EQUIPMENT Property, plant, and equipment, net consisted of the following: | | | | | | | | | | (In thousands) | | | March 31, 2026 | | | December 31, 2025 | Plant and equipment | | $ | 398,285 | | $ | 390,359 | Mining property and mineral rights | | | 139,077 | | | 139,077 | Construction in process | | | 28,975 | | | 22,264 | Capitalized mine development costs | | | 227,286 | | | 221,852 | Less: accumulated depreciation, depletion, and amortization | | | (276,533) | | | (261,609) | Total property, plant, and equipment, net | | $ | 517,090 | | $ | 511,943 |
Depreciation, depletion, and amortization included: | | | | | | | | | | | | | | | | Three months ended March 31, | (In thousands) | | 2026 | | 2025 | Depreciation of plant and equipment | | $ | 11,230 | | $ | 10,365 | Amortization of right of use assets (finance leases) | | | 1,699 | | | 1,892 | Amortization and depletion of capitalized | | | | | | | mine development costs and mineral rights | | | 3,684 | | | 5,285 | Total depreciation, depletion, and amortization | | $ | 16,613 | | $ | 17,542 |
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