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INVENTORIES (Tables)
3 Months Ended
Mar. 31, 2019
Inventory Disclosure [Abstract]  
Schedule of Inventory
Inventory components consist of the following:
 
March 31,
2019
 
December 31,
2018
Coal
$
8,853

 
$
4,642

Supplies
46,035

 
44,004

Total Inventories
$
54,888

 
$
48,646