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COMMITMENTS AND CONTINGENCIES: (Tables)

12 Months Ended

Dec. 31, 2015

COMMITMENTS AND CONTINGENCIES:

Schedule of environmental capital investments

Environmental capital investments in years 2015, 2014 and 2013, were as follows (in millions):

		2015			2014			2013
Peruvian operations		$	98.8		$	127.8		$	76.9
Mexican operations		22.0			24.4			39.8
Total		$	120.8		$	152.2		$	116.7

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