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INVENTORIES (Tables)
 6 Months Ended
Jun. 30, 2018
Inventory Disclosure [Abstract]  
Schedule of Inventory
Inventory components consist of the following:
 
June 30,
2018
 
December 31,
2017
Coal
$
4,924

 
$
11,411

Supplies
43,421

 
42,009

Total Inventories
$
48,345

 
$
53,420