REGULATORY ACTIONS (Tables)

12 Months Ended

Dec. 31, 2012

				2012
			NVE Total		NPC Electric		SPPC Electric		SPPC Gas
Deferred Energy
	Cumulative Balance authorized in 2012 DEAA		$	(262,845)	$	(177,336)	$	(56,422)	$	(29,087)
	2012 Amortization			293,185		185,339		78,601		29,245
	2012 Deferred Energy Over Collections⁽¹⁾			(182,221)		(109,121)		(54,872)		(18,228)
Deferred Energy Balance at December 31, 2012 - Subtotal			$	(151,881)	$	(101,118)	$	(32,693)	$	(18,070)
Reinstatement of deferred energy (effective 6/07, 10 years)				102,088		102,088		-		-
		Total Deferred Energy	$	(49,793)	$	970	$	(32,693)	$	(18,070)

Deferred Assets
	Deferred energy		$	87,072	$	87,072	$	-	$	-
Current Liabilities
	Deferred energy			(136,865)		(86,102)		(32,693)		(18,070)
		Total Net Deferred Energy	$	(49,793)	$	970	$	(32,693)	$	(18,070)


⁽¹⁾		These deferred energy over collections are subject to quarterly rate resets as discussed in Note 1, Summary of Significant Accounting Policies, Deferred Energy Accounting.

			2011
			NVE Total		NPC Electric		SPPC Electric		SPPC Gas
Deferred Energy
	Cumulative Balance authorized in 2011 DEAA		$	(334,102)	$	(189,032)	$	(115,955)	$	(29,115)
	2011 Amortization			247,489		120,340		104,909		22,240
	2011 Deferred Energy Over Collections⁽¹⁾			(173,466)		(106,022)		(45,291)		(22,153)
Deferred Energy Balance at December 31, 2011 - Subtotal			$	(260,079)	$	(174,714)	$	(56,337)	$	(29,028)
Reinstatement of deferred energy (effective 6/07, 10 years)				117,440		117,440		-		-
	Total Deferred Energy		$	(142,639)	$	(57,274)	$	(56,337)	$	(29,028)

Deferred Assets
	Deferred energy		$	102,525	$	102,525	$	-	$	-
Current Liabilities
	Deferred energy			(245,164)		(159,799)		(56,337)		(29,028)
		Total Net Deferred Energy	$	(142,639)	$	(57,274)	$	(56,337)	$	(29,028)

⁽¹⁾		Refer to "Settled Regulatory Actions" below for separate discussions regarding NPC and SPPC's 2012 DEAA rate filings.

Schedule of Regulatory Assets and Liabilities [Text Block]

		NVE
		OTHER REGULATORY ASSETS AND LIABILITIES

		As of December 31, 2012
		Remaining	Receiving Regulatory Recovery					Pending					As of
DESCRIPTION		Amortization	Earning a			Not Earning		Regulatory			2012		December 31, 2011
		Period	Return		(1)	a Return		Review			Total		Total
Regulatory assets
	Loss on reacquired debt	Term of Related Debt	$	66,911		$	-	$	-		$	66,911	$	72,408
	Income taxes	Various		-			269,693		-			269,693		283,315
	Merger costs	Various thru 2046		-			257,185		-			257,185		268,668
	Lenzie Generating Station	2042		-			65,139		-			65,139		67,351
	Mohave Generating Station and deferred costs	2017		6,931			10,545		4,230			21,706		24,160
	Piñon Pine	Various thru 2029		25,805			3,837		-	⁽²⁾		29,642		34,393
	Asset retirement obligations			-			-		66,559			66,559		67,891
	Conservation programs	Various thru 2017		110,246			-		12,310	⁽²⁾		122,556		158,447
	EEPR	Various thru 2014		4,744			-		-	⁽³⁾		4,744		30,379
	EEIR	Various thru 2014		12,597			-		-			12,597		14,062
	Ely Energy Center	2017		-			19,503		34,359			53,862		57,966
	Legacy Meters			-			-		64,112	⁽²⁾		64,112		21,777
	Renewable energy programs	Various thru 2014		23,703			-		-	⁽²⁾		23,703		29,592
	Peabody coal costs			-			18,305		-			18,305		17,899
	Deferred Rate Increase	2013		8,550			-		-			8,550		12,177
	Other costs	Various thru 2031		21,451			17,745		8,308			47,504		57,643
	Subtotal		$	280,938		$	661,952	$	189,878	^{(2, 3)}	$	1,132,768	$	1,218,128
	Pensions			281,195			-		-			281,195		215,656
Total regulatory assets			$	562,133		$	661,952	$	189,878		$	1,413,963	$	1,433,784

Regulatory liabilities
	Cost of removal	Various	$	457,074		$	-	$	-		$	457,074	$	422,033
	Income taxes	Various		-			15,142		-			15,142		17,433
	Gain on property sales	2013		2,222			-		27,300			29,522		37,288
	EEPR	2014		34,727	(4)		-		-			34,727		-
	EEIR	2014		6,790	(4)		-		-			6,790		-
	Renewable energy programs	2014		460	(4)		-		-			460		1,046
	Other	Various thru 2043		5,400			-		1,572	⁽³⁾		6,972		8,459
Total regulatory liabilities			$	506,673		$	15,142	$	28,872		$	550,687	$	486,259

		NPC
		OTHER REGULATORY ASSETS AND LIABILITIES

		As of December 31, 2012
		Remaining	Receiving Regulatory Recovery					Pending					As of
DESCRIPTION		Amortization	Earning a			Not Earning		Regulatory			2012		December 31, 2011
		Period	Return		(1)	a Return		Review			Total		Total
Regulatory assets
	Loss on reacquired debt	Term of Related Debt	$	37,821		$	-	$	-		$	37,821	$	39,958
	Income taxes	Various		-			169,211		-			169,211		178,060
	Merger costs	Various thru 2044		-			161,833		-			161,833		168,212
	Lenzie Generating Station	2042		-			65,139		-			65,139		67,351
	Mohave Generating Station and deferred costs	Various thru 2017		6,931			10,545		4,230	⁽²⁾		21,706		24,160
	Asset retirement obligations			-			-		58,368	⁽²⁾		58,368		60,797
	Conservation programs	Various thru 2017		99,671			-		7,511	⁽³⁾		107,182		133,889
	EEPR	Various thru 2014		4,174			-		-			4,174		25,250
	EEIR	Various thru 2014		9,302			-		-			9,302		12,342
	Ely Energy Center	2017		-			19,503		22,815	⁽²⁾		42,318		46,373
	Legacy Meters			-			-		61,420	⁽²⁾		61,420		21,777
	Renewable energy programs	Various thru 2014		9,495			-		-			9,495		10,694
	Peabody coal costs			-			18,305		-			18,305		17,899
	Deferred Rate Increase	2013		8,550			-		-			8,550		12,177
	Other costs	2017		9,578			14,319		5,292	^{(2, 3)}		29,189		34,050
	Subtotal		$	185,522		$	458,855	$	159,636		$	804,013	$	852,989
	Pensions			136,682			-		-			136,682		108,528
Total regulatory assets			$	322,204		$	458,855	$	159,636		$	940,695	$	961,517


Regulatory liabilities
	Cost of removal	Various	$	252,648		$	-	$	-		$	252,648	$	232,093
	Income taxes	Various		-			4,707		-			4,707		5,798
	Gain on property sales			-			-		27,300			27,300		32,844
	EEPR	2014		29,808	⁽⁴⁾		-		-			29,808		-
	EEIR	2014		6,790	⁽⁴⁾		-		-			6,790		-
	Other	Various thru 2018		639			-		1,508	⁽³⁾		2,147		4,216
Total regulatory liabilities			$	289,885		$	4,707	$	28,808		$	323,400	$	274,951

		SPPC
		OTHER REGULATORY ASSETS AND LIABILITIES

		As of December 31, 2012
		Remaining	Receiving Regulatory Recovery					Pending					As of
DESCRIPTION		Amortization	Earning a			Not Earning		Regulatory			2012		December 31, 2011
		Period	Return		(1)	a Return		Review			Total		Total
Regulatory assets
	Loss on reacquired debt	Term of Related Debt	$	29,090		$	-	$	-		$	29,090	$	32,450
	Income taxes	Various		-			100,482		-			100,482		105,255
	Merger costs	Various thru 2046		-			95,352		-			95,352		100,456
	Piñon Pine	Various thru 2029		25,805			3,837		-			29,642		34,393
	Asset retirement obligations			-			-		8,191	⁽²⁾		8,191		7,094
	Conservation programs	Various thru 2013		10,575			-		4,799	⁽³⁾		15,374		24,558
	EEPR	Various thru 2014		570			-		-			570		5,129
	EEIR	Various thru 2014		3,295			-		-			3,295		1,720
	Renewable energy programs	Various thru 2014		14,208			-		-			14,208		18,898
	Ely Energy Center			-			-		11,544	⁽²⁾		11,544		11,593
	Legacy Meters			-			-		2,692	⁽²⁾		2,692		-
	Other costs	Various thru 2031		11,873			3,426		3,016	^{(2, 3)}		18,315		23,593
	Subtotal		$	95,416		$	203,097	$	30,242		$	328,755	$	365,139
	Pensions			140,268			-		-			140,268		104,159
Total regulatory assets			$	235,684		$	203,097	$	30,242		$	469,023	$	469,298


Regulatory liabilities
	Cost of removal	Various	$	204,426		$	-	$	-		$	204,426	$	189,940
	Income taxes	Various		-			10,435		-			10,435		11,635
	Gain on property sales	2013		2,222			-		-			2,222		4,444
	EEPR	2014		4,919	⁽⁴⁾		-		-			4,919		-
	Renewable energy programs	2014		460	⁽⁴⁾		-		-			460		-
	Other costs	Various thru 2043		4,761			-		64	⁽³⁾		4,825		5,289
Total regulatory liabilities			$	216,788		$	10,435	$	64		$	227,287	$	211,308

Summary of Rate Filings


					Authorized			Present			$ Change in
				Effective	Revenue			Revenue			Revenue
				Date	Requirement			Requirement		(3)	Requirement
Revenue Requirement Subject To Change:
		2008 GRC Deferred Rate Increase ⁽¹⁾		Oct. 2012	$	11.5		$	0.0		$	11.5
		REPR ⁽²⁾		Oct. 2012		37.4			8.5			28.9
		TRED ⁽²⁾		Oct. 2012		15.3			18.0			(2.7)
		EEPR Base ⁽²⁾		Jan. 2013		33.1			57.3			(24.2)
		EEPR Amortization ⁽²⁾		Jan. 2013		8.9			21.2			(12.3)
		EEIR Base		Jan. 2013		11.0			16.8			(5.8)
		EEIR Amortization		Jan. 2013		10.4	⁽¹⁾		4.8			5.6
			Total Revenue Requirement		$	127.6		$	126.6		$	1.0

	⁽¹⁾	This rate request represents revenues previously recorded as a result of NPC's 2008 GRC. As such, NPC will not record further
		revenue related to this rate component, but will collect such amounts from its customers. Refer to Regulatory Actions, NPC 2012
		DEAA, below for further discussion.
	⁽²⁾	Represents programs that require the Utilities to collect funds from customers for which the related costs are equal to the
		revenues collected. As a result, such programs have no effect on Operating or Net Income.
	⁽³⁾	Represents present revenue requirement at the time of filing.


				Authorized			Present			$ Change in
			Effective	Revenue			Revenue			Revenue
			Date	Requirement			Requirement		(2)	Requirement
Revenue Requirement Subject To Change:
	DEAA		Oct. 2011	$	(188.9)		$	(101.0)		$	(87.9)
	REPR		Oct. 2011		8.6			29.8			(21.2)
	TRED		Oct. 2011		18.1			16.3			1.8
	EEPR Base		Oct. 2011		58.4			58.4			0.0
	EEPR Amortization		Oct. 2011		21.3			0.0			21.3
	EEIR Base		Oct. 2011		17.1			14.5			2.6
	EEIR Amortization		Oct. 2011		4.8	⁽¹⁾		0.0			4.8
		Total Revenue Requirement		$	(60.6)		$	18.0		$	(78.6)

⁽¹⁾	In accordance with Alternative Revenue Accounting, NPC recognized approximately $4.8 million in revenues pertaining to 2010.
	Based on the order from the PUCN in May 2011, which clarified the calculation of EEIR revenues, NPC does not expect to record
	further revenue from this rate request; however, NPC does expect to collect approximately $4.8 million from its customers.
⁽²⁾	Represents present revenue requirement at the time of filing.


				Authorized		Present			$ Change in
			Effective	Revenue		Revenue			Revenue
			Date	Requirement		Requirement		(2)	Requirement
Revenue Requirement Subject To Change:
	REPR⁽¹⁾		Oct. 2012	$	43.3	$	38.5		$	4.8
	TRED⁽¹⁾		Oct. 2012		6.1		9.2			(3.1)
	EEPR Base⁽¹⁾		Jan. 2013		5.4		9.8			(4.4)
	EEPR Amortization⁽¹⁾		Jan. 2013		1.7		4.7			(3.0)
	EEIR Base		Jan. 2013		4.9		3.1			1.8
	EEIR Amortization		Jan. 2013		1.9		0.5			1.4
		Total Revenue Requirement		$	63.3	$	65.8		$	(2.5)

⁽¹⁾	Represents programs that require the Utilities to collect funds from customers for which the related costs are equal to the revenues
	collected. As a result, such programs have no effect on Operating or Net Income.
⁽²⁾	Represents present revenue requirement at the time of filing.


				Authorized			Present			$ Change in
			Effective	Revenue			Revenue			Revenue
			Date	Requirement			Requirement		(2)	Requirement
Revenue Requirement Subject To Change:
	DEAA		Oct. 2011	$	(115.9)		$	(99.5)		$	(16.4)
	REPR		Oct. 2011		38.0			36.6			1.4
	TRED		Oct. 2011		9.1			7.9			1.2
	EEPR Base		Oct. 2011		9.7			9.7			0.0
	EEPR Amortization		Oct. 2011		4.6			0.0			4.6
	EEIR Base		Oct. 2011		3.1			2.6			0.5
	EEIR Amortization		Oct. 2011		0.5	⁽¹⁾		0.0			0.5
		Total Revenue Requirement		$	(50.9)		$	(42.7)		$	(8.2)

⁽¹⁾	In accordance with Alternative Revenue Accounting, SPPC recognized approximately $0.5 million in revenues pertaining to 2010.
	Based on the order from the PUCN in May 2011, which clarified the calculation of EEIR revenues, SPPC does not expect to record
	further revenue from this rate request; however, SPPC does expect to collect approximately $0.5 million from its customers.
⁽²⁾	Represents present revenue requirement at the time of filing.