RETIREMENT PLAN AND POST-RETIREMENT BENEFITS (Tables)

6 Months Ended

Jun. 30, 2011

RETIREMENT PLAN AND POST-RETIREMENT BENEFITS [Abstract]

Components of Net Periodic Pension and Other Postretirement Costs

A summary of the components of net periodic pension and other postretirement costs for the three and six months ended June 30 follows.  This summary is based on a December 31, measurement date (dollars in thousands):

NVE
	Pension Benefits						Other Postretirement Benefits
	For the three months ended June 30,						For the three months ended June 30,
	2011			2010			2011			2010
Service cost	$	4,607		$	4,727		$	653		$	617
Interest cost		10,169			10,718			2,090			2,184
Expected return on plan assets		(12,192	)		(11,069	)		(1,596	)		(1,556	)
Amortization of prior service cost		(738	)		(448	)		(987	)		(972	)
Amortization of net loss		4,155			3,777			1,083			1,085
Net periodic benefit cost	$	6,001		$	7,705		$	1,243		$	1,358
	Pension Benefits						Other Postretirement Benefits
	For the six months ended June 30,						For the six months ended June 30,
		2011			2010			2011			2010
Service cost	$	9,213		$	9,455		$	1,306		$	1,233
Interest cost		20,338			21,436			4,180			4,368
Expected return on plan assets		(24,383	)		(22,138	)		(3,193	)		(3,111	)
Amortization of prior service cost		(1,476	)		(897	)		(1,973	)		(1,945	)
Amortization of net loss		8,310			7,553			2,166			2,171
Net periodic benefit cost	$	12,002		$	15,409		$	2,486		$	2,716
The average percentage of NVE net periodic costs capitalized during 2011 and 2010 was 32.77% and 33.58% respectively.

NPC
	Pension Benefits						Other Postretirement Benefits
	For the three months ended June 30,						For the three months ended June 30,
	2011			2010			2011			2010
Service cost	$	2,445		$	2,392		$	363		$	353
Interest cost		4,880			5,023			615			619
Expected return on plan assets		(6,169	)		(5,362	)		(590	)		(567	)
Amortization of prior service cost		(470	)		(433	)		229			236
Amortization of net loss		1,690			1,764			302			300
Net periodic benefit cost	$	2,376		$	3,384		$	919		$	941
	Pension Benefits						Other Postretirement Benefits
	For the six months ended June 30,						For the six months ended June 30,
		2011			2010			2011			2010
Service cost	$	4,891		$	4,784		$	727		$	707
Interest cost		9,760			10,046			1,230			1,237
Expected return on plan assets		(12,339	)		(10,724	)		(1,180	)		(1,135	)
Amortization of prior service cost		(939	)		(866	)		458			473
Amortization of net loss		3,379			3,528			604			599
Net periodic benefit cost	$	4,752		$	6,768		$	1,839		$	1,881
The average percentage of NPC net periodic costs capitalized during 2011 and 2010 was 37.32% and 35.71% respectively.

SPPC
	Pension Benefits						Other Postretirement Benefits
	For the three months ended June 30,						For the three months ended June 30,
	2011			2010			2011			2010
Service cost	$	1,840		$	2,004		$	271		$	245
Interest cost		5,013			5,389			1,457			1,547
Expected return on plan assets		(5,741	)		(5,431	)		(976	)		(961	)
Amortization of prior service cost		(277	)		(26	)		(1,219	)		(1,213	)
Amortization of net loss		2,412			1,969			773			777
Net periodic benefit cost	$	3,247		$	3,905		$	306		$	395
	Pension Benefits						Other Postretirement Benefits
	For the six months ended June 30,						For the six months ended June 30,
		2011			2010			2011			2010
Service cost	$	3,680		$	4,008		$	543		$	489
Interest cost		10,025			10,779			2,915			3,094
Expected return on plan assets		(11,482	)		(10,862	)		(1,952	)		(1,922	)
Amortization of prior service cost		(554	)		(52	)		(2,439	)		(2,426	)
Amortization of net loss		4,824			3,938			1,546			1,554
Net periodic benefit cost	$	6,493		$	7,811		$	613		$	789
The average percentage of SPPC net periodic costs capitalized during 2011 and 2010 was 30.22% and 34.55% respectively.