COMMITMENTS AND CONTINGENCIES: (Tables)

12 Months Ended

Dec. 31, 2013

COMMITMENTS AND CONTINGENCIES:

Schedule of environmental capital expenditures

Environmental capital expenditures in years 2013, 2012 and 2011, were as follows (in millions):

	2013		2012		2011
Peruvian operations	$	20.9	$	6.7	$	2.5
Mexican operations	39.8		20.7		11.5
Total	$	60.7	$	27.4	$	14.0