BENEFIT PLANS: (Tables)

6 Months Ended

Jun. 30, 2011

SCC Defined Benefit Pension Plans

Components of net periodic benefit costs

Schedule of components of net periodic benefit costs

	2011			2010
Interest cost	$	0.3		$	0.3
Expected return on plan assets	(0.3		)	(0.3		)
Amortization of net loss (gain)	*			*
Net periodic benefit costs	$	—		$	—

(*) amount is lower than $0.1 million

Minera Mexico Pension Plans

Components of net periodic benefit costs

Schedule of components of net periodic benefit costs

	2011			2010
Interest cost	$	0.3		$	0.8
Service cost	0.5			1.0
Expected return on plan assets	(1.7		)	(1.4		)
Amortization of transition assets, net	(*		)	(*		)
Amortization of net actuarial loss	(0.8		)	(0.5		)
Amortization of prior services cost	(*		)	0.1
Net periodic benefit cost	$	(1.7	)	$	—

(*) amount is lower than $0.1 million

Minera Mexico Post-retirement Healthcare Plan

Components of net periodic benefit costs

Schedule of components of net periodic benefit costs

	2011			2010
Interest cost	$	1.9		$	2.1
Service cost	(*		)	0.2
Amortization of net loss (gain)	(*		)	(*		)
Amortization of transition obligation	0.8			(0.7		)
Net periodic benefit cost	$	2.7		$	1.6

(*) amount is lower than $0.1 million