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Note 3 - Property, Plant and Equipment | 12 Months Ended
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Dec. 31, 2022
Notes to Financial Statements |
PROPERTY, PLANT AND EQUIPMENT | NOTE 3—PROPERTY, PLANT AND EQUIPMENT Property, plant and equipment consisted of the following: ​
​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | December 31,
(In thousands) | ​ | 2022 |  | 2021
Plant and equipment | ​ | $ | 232,885 | ​ | $ | 167,019
Mining property and mineral rights | ​ | ​ | 120,760 | ​ | ​ | 26,064
Construction in process | ​ |  | 34,698 | ​ |  | 9,972
Capitalized mine development costs | ​ |  | 153,436 | ​ |  | 104,291
Less: accumulated depreciation and amortization | ​ |  | (111,937) | ​ |  | (80,269)
Total property, plant and equipment, net | ​ | $ | 429,842 | ​ | $ | 227,077
​ Capitalized amounts related to coal reserves at properties where we are not currently engaged in mining operations totaled $33.4 million as of December 31, 2022 and $25.1 million as of December 31, 2021. In addition to the amounts discussed above, on July 10, 2022, the Company experienced a methane ignition at the Berwind No. 1 mine, which was one of the active mines at our Berwind mining complex. The other mines resumed production while the Berwind No. 1 mine was idled until a full investigation could be conducted. There were no personnel in the mine at the time of the incident and no injuries or fatalities occurred. The overall impact to pre-tax earnings in 2022 was immaterial except for idle mine costs of $9.5 million recognized during the year. Production from the Berwind No. 1 mine restarted in the first quarter of 2023. Mining property and mineral rights are made up primarily of significant asset acquisitions that occurred in 2022 and 2021. Refer to Note 4 for more information. Depreciation, depletion, and amortization included: ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | Year ended December 31,
(In thousands) |  | 2022 |  | 2021 |  | 2020
Depreciation of plant and equipment | ​ | $ | 24,132 | ​ | $ | 17,945 | ​ | $ | 17,094
Amortization of right of use assets (finance leases) | ​ | ​ | 4,846 | ​ | ​ | 1,109 | ​ | ​ | —
Amortization and depletion of | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
capitalized mine development costs and mineral rights | ​ |  | 12,216 | ​ |  | 7,151 | ​ | ​ | 3,818
Total depreciation, depletion, and amortization | ​ | $ | 41,194 | ​ | $ | 26,205 | ​ | $ | 20,912
​

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