COMMITMENTS AND CONTINGENCIES: (Tables)

6 Months Ended

Jun. 30, 2013

COMMITMENTS AND CONTINGENCIES:

Schedule of environmental capital expenditures

Environmental capital expenditures in the six months ended June 30, 2013 and 2012 were as follows (in millions):

	2013		2012
Peruvian operations	$	2.1	$	2.1
Mexican operations	21.2		10.7
	$	23.3	$	12.8