Related Party Transactions

12 Months Ended

Dec. 31, 2012

Related Party Transactions [Abstract]

Related Party Transactions

14. Related Party Transactions

Xcel Energy Services Inc. provides management, administrative and other services for the subsidiaries of Xcel Energy Inc., including NSP-Wisconsin. The services are provided and billed to each subsidiary in accordance with service agreements executed by each subsidiary. NSP-Wisconsin uses services provided by Xcel Energy Services Inc. whenever possible. Costs are charged directly to the subsidiary and are allocated if they cannot be directly assigned.

The electric production and transmission costs of the entire NSP System are shared by NSP-Minnesota and NSP-Wisconsin. The Interchange Agreement provides for the sharing of all costs of generation and transmission facilities of the system, including capital costs.

The table below contains significant affiliate transactions among the companies and related parties including billings under the Interchange Agreement for the years ended Dec. 31:

(Thousands of Dollars)	2012		2011		2010
Operating revenues:
Electric	$	125,344	$	124,334	$	116,312
Operating expenses:
Purchased power		405,016		399,649		377,518
Transmission expense		44,942		40,870		38,558
Natural gas purchased for resale		116		98		163
Other operating expenses - paid to Xcel Energy Services Inc.		54,137		54,885		52,826
Interest expense		22		48		56

Accounts receivable and payable with affiliates at Dec. 31 were:

	2012				2011
	Accounts		Accounts		Accounts		Accounts
(Thousands of Dollars)	Receivable		Payable		Receivable		Payable
NSP-Minnesota	$	-	$	26,632	$	-	$	18,003
PSCo		-		71		-		112
SPS		-		4		-		-
Other subsidiaries of Xcel Energy Inc.		586		4,849		-		5,170
	$	586	$	31,556	$	-	$	23,285