JOINTLY OWNED FACILITIES (Tables)

12 Months Ended

Dec. 31, 2011

Jointly Owned Electric Utility Facilities

		2011

			Plant in		Accumulated		Net Plant in
		% Owned	Service		Depreciation		Service		CWIP

NPC
	Navajo Generating Station	11.3%	$	270,448	$	148,582	$	121,866	$	1,117
	Reid Gardner Generating Station No. 4	32.2%		171,485		97,042		74,443		7,600
	Silverhawk Generating Station	75.0%		247,342		50,822		196,520		203
			$	689,275	$	296,446	$	392,829	$	8,920
SPPC
	Valmy Generating Station	50.0%	$	331,753	$	215,642	$	116,111	$	6,682

		2010
			Plant in		Accumulated		Net Plant in
		% Owned	Service		Depreciation		Service		CWIP

NPC
	Navajo Generating Station	11.3%	$	249,646	$	141,326	$	108,320	$	1
	Reid Gardner Generating Station No. 4	32.2%		165,795		98,047		67,748		21,016
	Silverhawk Generating Station	75.0%		250,790		47,194		203,596		183
			$	666,231	$	286,567	$	379,664	$	21,200
SPPC
	Valmy Generating Station	50.0%	$	313,378	$	210,165	$	103,213	$	5,605

- Definition

Tabular disclosure of proportionate interests in jointly owned utility plants. Includes the amount of plants in service, the accumulated provision for depreciation (if available), the amount of plants under construction, and the proportionate share. The amounts presented may be further subdivided to show amounts applicable to plant subcategories (for example, production, transmission, distribution). Includes statements that the amounts represent the utility's share in each joint plant and that it must provide its own financing. Information concerning two or more generating plants on the same site may be combined. States that the utility's share of direct expenses of the joint plants is included in the corresponding operating expenses on its income statement (for example, fuel, maintenance of plant, other operating expense). If the share of direct expenses is charged to purchased power, then disclose the amount so charged and the proportionate amounts charged to specific operating expenses on the records maintained for the joint plants.

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