Joint Ownership of Generation, Transmission and Gas Facilities (Tables)

12 Months Ended

Dec. 31, 2011

Joint Ownership of Generation, Transmission and Gas Facilities [Abstract]

Investments by Subsidiaries in Jointly Owned Generation, Transmission and Gas Facilities and Related Ownership Percentages

Following are the investments by Xcel Energy Inc.'s utility subsidiaries in jointly owned generation, transmission and gas facilities and the related ownership percentages as of Dec. 31, 2011:

					Construction
	Plant in		Accumulated		Work in
(Thousands of Dollars)	Service		Depreciation		Progress		Ownership %
NSP-Minnesota
Electric Generation:
Sherco Unit 3	$	565,832	$	358,907	$	3,731		59.0	%
Sherco Common Facilities Units 1, 2 and 3		138,790		82,229		531		80.0
Sherco Substation		4,790		2,621		-		59.0
Electric Transmission:
Grand Meadow Line and Substation		11,204		855		-		50.0
CapX2020 Transmission		57,856		8,899		74,404		49.6
Total NSP-Minnesota	$	778,472	$	453,511	$	78,666

					Construction
	Plant in		Accumulated		Work in
(Thousands of Dollars)	Service		Depreciation		Progress		Ownership %
PSCo
Electric Generation:
Hayden Unit 1	$	88,337	$	60,549	$	830		75.5	%
Hayden Unit 2		119,621		55,126		722		37.4
Hayden Common Facilities		34,558		14,155		1		53.1
Craig Units 1 and 2		54,058		33,225		193		9.7
Craig Common Facilities 1, 2 and 3		35,241		15,896		2,863		6.5 - 9.7
Comanche Unit 3		867,976		28,973		1,014		66.7
Comanche Common Facilities		12,628		219		169		82.0
Electric Transmission:
Transmission and other facilities, including substations		150,420		56,654		449	Various
Gas Transportation:
Rifle to Avon		16,278		6,333		-		60.0
Total PSCo	$	1,379,117	$	271,130	$	6,241

- 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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