BALANCE SHEETS (UNAUDITED) (USD $) In Thousands, unless otherwise specified	Jun. 30, 2012	Dec. 31, 2011
Current assets
Cash and cash equivalents	$ 1,182	$ 650
Accounts receivable, net	75,351	65,030
Accounts receivable from affiliates	6,557	1,314
Investments in utility money pool arrangement	5,000	0
Accrued unbilled revenues	115,319	104,142
Inventories	25,190	35,575
Regulatory assets	23,004	25,244
Derivative instruments	7,892	7,892
Deferred income taxes	30,123	18,247
Prepayments and other	12,042	7,486
Total current assets	301,660	265,580
Property, plant and equipment, net	2,720,775	2,594,732
Other assets
Regulatory assets	292,718	294,813
Derivative instruments	52,895	56,841
Other	13,771	11,883
Total other assets	359,384	363,537
Total assets	3,381,819	3,223,849
Current liabilities
Borrowings under utility money pool arrangement	0	5,000
Accounts payable	132,924	140,412
Accounts payable to affiliates	13,362	11,828
Regulatory liabilities	84,987	57,104
Taxes accrued	14,961	19,910
Accrued interest	15,087	13,842
Dividends payable	16,400	16,913
Derivative instruments	3,601	3,601
Other	30,948	29,841
Total current liabilities	312,270	298,451
Deferred credits and other liabilities
Deferred income taxes	636,237	596,581
Regulatory liabilities	100,008	105,335
Asset retirement obligations	28,090	27,266
Derivative instruments	39,590	41,391
Pension and employee benefit obligations	64,666	76,307
Other	8,158	8,345
Total deferred credits and other liabilities	876,749	855,225
Commitments and contingencies
Capitalization
Long-term debt	1,103,566	993,314
Common stock - 200 shares authorized of $1.00 par value; 100 shares outstanding at June 30, 2012 and Dec. 31, 2011, respectively	0	0
Additional paid in capital	786,973	783,162
Retained earnings	303,679	295,201
Accumulated other comprehensive loss	(1,418)	(1,504)
Total common stockholder's equity	1,089,234	1,076,859
Total liabilities and equity	$ 3,381,819	$ 3,223,849