COMMITMENTS AND CONTINGENCIES: (Tables)

9 Months Ended

Sep. 30, 2022

COMMITMENTS AND CONTINGENCIES:

Schedule of environmental capital investments

Environmental capital investments in the nine-month periods ended September 30, 2022 and 2021 were as follows (in millions):

	2022		2021
Peruvian operations	$	7.1	$	2.9
Mexican operations		35.4		57.7
	$	42.5	$	60.6