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Inventories
3 Months Ended
Mar. 31, 2017
Inventory Disclosure [Abstract]  
Inventories
Inventories
Inventories as of March 31, 2017 and December 31, 2016 consisted of the following:
 
March 31, 2017
 
December 31, 2016
 
(Dollars in millions)
Materials and supplies
$
101.6

 
$
104.5

Raw coal
40.9

 
29.6

Saleable coal
108.3

 
69.6

Total
$
250.8

 
$
203.7

Materials and supplies inventories presented above have been shown net of reserves of $6.1 million and $5.6 million as of March 31, 2017 and December 31, 2016, respectively.