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INVENTORIES
3 Months Ended
Mar. 31, 2022
Inventory Disclosure [Abstract]  
INVENTORIES INVENTORIES
The components of Inventories for the periods ended March 31, 2022 and December 31, 2021 are as follows (in thousands):
March 31, 2022December 31, 2021
Materials and supplies$97,741 $79,372 
Stockpiled ore 33,200 27,589 
Leach pad inventory257,577 243,627 
Work-in-process 5,820 4,951 
Finished goods25,411 33,877 
Total current inventories
$419,749 $389,416 
Stockpiled ore 219,853 220,324 
Materials and supplies1,505 1,293 
Total non-current inventories 
$221,358 $221,617