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COMMITMENTS AND CONTINGENCIES: (Tables)

12 Months Ended

Dec. 31, 2014

COMMITMENTS AND CONTINGENCIES:

Schedule of environmental capital expenditures

Environmental capital expenditures in years 2014, 2013 and 2012, were as follows (in millions):

		2014			2013			2012
Peruvian operations		$	127.0		$	76.9		$	27.0
Mexican operations		24.4			39.8			20.7
Total		$	151.4		$	116.7		$	47.7

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