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COMMITMENTS AND CONTINGENCIES: (Tables)

3 Months Ended

Mar. 31, 2018

COMMITMENTS AND CONTINGENCIES:

Schedule of environmental capital investments

Environmental capital investments in the three months ended March 31, 2018 and 2017 were as follows (in millions):

		2018			2017
Peruvian operations		$	6.5		$	16.5
Mexican operations		19.9			22.1
		$	26.4		$	38.6

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Tabular disclosure of environmental capital expenditures incurred during the period.

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