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COMMITMENTS AND CONTINGENCIES: (Tables)

9 Months Ended

Sep. 30, 2018

COMMITMENTS AND CONTINGENCIES:

Schedule of environmental capital investments

Environmental capital investments in the nine months ended September 30, 2018 and 2017 were as follows (in millions):

		2018			2017
Peruvian operations		$	38.0		$	60.5
Mexican operations		35.3			95.1
		$	73.3		$	155.6

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Tabular disclosure of environmental capital expenditures incurred during the period.

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