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COMMITMENTS AND CONTINGENCIES: (Tables)

9 Months Ended

Sep. 30, 2016

COMMITMENTS AND CONTINGENCIES:

Schedule of environmental capital investments

Environmental capital investments in the nine months ended September 30, 2016 and 2015 were as follows ($ in millions):

		2016			2015
Peruvian operations		$	58.7		$	60.8
Mexican operations		101.2			15.4
		$	159.9		$	76.2

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Tabular disclosure of environmental capital expenditures incurred during the period.

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