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INVENTORIES | 12 Months Ended
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Dec. 31, 2021
Inventory Disclosure [Abstract] |
INVENTORIES | INVENTORIES The components of Inventories were as follows (in thousands):
|  | December 31,
|  | 2021 |  | 2020
Materials and supplies |  | $ | 79,372 |  |  | $ | 85,766 |
Stockpiled ore |  |  | 27,589 |  |  |  | 25,582 |
Leach pad inventory |  |  | 243,627 |  |  |  | 282,793 |
Work-in-process |  |  | 4,951 |  |  |  | 4,368 |
Finished goods |  |  | 33,877 |  |  |  | 38,525 |
Total current inventories |  | $ | 389,416 |  |  | $ | 437,034 |
Stockpiled ore |  |  | 220,324 |  |  |  | 133,500 |
Materials and supplies |  |  | 1,293 |  |  |  | 1,700 |
Total non-current inventories |  | $ | 221,617 |  |  | $ | 135,200 |
As of December 31, 2021 and 2020, the Company has recognized a reserve of $8.1 million and $7.2 million for obsolete materials and supplies inventory, respectively. During the year ended December 31, 2021, 2020 and 2019, the Company recognized write-downs of stockpiled ore inventories of $— million, $12.1 million, and $11.8 million respectively, classified as components of Production Costs and Depreciation, depletion and amortization.

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- Definition The entire disclosure for inventory. Includes, but is not limited to, the basis of stating inventory, the method of determining inventory cost, the classes of inventory, and the nature of the cost elements included in inventory. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 330 -URI http://asc.fasb.org/topic&trid=2126998 + Details
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