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INVENTORIES: (Tables)

9 Months Ended

Sep. 30, 2016

INVENTORIES:

Schedule of inventories

Inventories were as follows ($ in millions):

		At September 30, 2016			At December 31, 2015
Inventory, current:
Metals at average cost:
Finished goods		$	115.8		$	104.1
Work-in-process		196.5			188.6
Ore stockpiles on leach pads		304.2			243.2
Supplies at average cost		356.1			321.3
Total current inventory		$	972.6		$	857.2
Inventory, non-current:
Ore stockpiles on leach pads		$	786.6		$	752.3

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