BALANCE SHEETS (UNAUDITED) (USD $) In Thousands, unless otherwise specified	Jun. 30, 2013	Dec. 31, 2012
Current assets
Cash and cash equivalents	$ 910	$ 482
Accounts receivable, net	72,467	62,067
Accounts receivable from affiliates	3,135	4,791
Accrued unbilled revenues	135,063	98,892
Inventories	28,235	31,337
Regulatory assets	26,103	24,020
Derivative instruments	7,892	7,892
Deferred income taxes	36,947	27,528
Prepayments and other	17,421	11,387
Total current assets	328,173	268,396
Property, plant and equipment, net	3,059,874	2,861,756
Other assets
Regulatory assets	313,373	324,081
Derivative instruments	45,003	48,949
Other	17,559	14,759
Total other assets	375,935	387,789
Total assets	3,763,982	3,517,941
Current liabilities
Short-term debt	49,000	9,000
Borrowings under utility money pool arrangement	66,000	0
Accounts payable	174,829	141,327
Accounts payable to affiliates	11,185	12,363
Regulatory liabilities	45,685	75,891
Taxes accrued	21,918	19,380
Accrued interest	15,440	15,104
Dividends payable	17,475	16,773
Derivative instruments	3,601	3,601
Other	31,890	31,084
Total current liabilities	437,023	324,523
Deferred credits and other liabilities
Deferred income taxes	699,248	662,201
Regulatory liabilities	81,143	91,815
Asset retirement obligations	18,104	17,607
Derivative instruments	35,990	37,790
Pension and employee benefit obligations	77,427	97,273
Other	3,009	6,093
Total deferred credits and other liabilities	914,921	912,779
Commitments and contingencies
Capitalization
Long-term debt	1,103,797	1,103,684
Common stock – 200 shares authorized of $1.00 par value; 100 shares outstanding at June 30, 2013 and Dec. 31, 2012, respectively	0	0
Additional paid in capital	968,186	843,186
Retained earnings	341,302	335,101
Accumulated other comprehensive loss	(1,247)	(1,332)
Total common stockholder’s equity	1,308,241	1,176,955
Total liabilities and equity	$ 3,763,982	$ 3,517,941