CONSOLIDATED BALANCE SHEETS (UNAUDITED) (USD $) In Thousands	Jun. 30, 2011	Dec. 31, 2010
Current assets
Cash and cash equivalents	$ 1,419	$ 6,445
Accounts receivable, net	47,638	51,667
Accrued unbilled revenues	37,064	51,579
Inventories	20,812	26,616
Regulatory assets	12,395	14,084
Prepaid taxes	20,060	21,097
Prepayments and other	1,879	2,555
Total current assets	141,267	174,043
Property, plant and equipment, net	1,153,063	1,130,342
Other assets
Regulatory assets	210,533	214,402
Other investments	4,078	4,036
Other	3,680	3,705
Total other assets	218,291	222,143
Total assets	1,512,621	1,526,528
Current liabilities
Current portion of long-term debt	1,473	1,502
Short-term debt	35,000	0
Notes payable to affiliates	550	37,550
Accounts payable	20,830	35,124
Accounts payable to affiliates	26,739	36,320
Dividends payable to parent	8,112	8,441
Regulatory liabilities	8,636	10,377
Accrued interest	6,646	6,438
Taxes accrued	2,303	867
Derivative instruments	293	1,787
Other	17,826	17,543
Total current liabilities	128,408	155,949
Deferred credits and other liabilities
Deferred income taxes	212,164	198,793
Deferred investment tax credits	8,803	9,110
Regulatory liabilities	118,105	117,318
Environmental liabilities	98,486	97,740
Pension and employee benefit obligations	44,877	51,592
Customer advances	17,844	17,352
Other	6,589	8,142
Total deferred credits and other liabilities	506,868	500,047
Commitments and contingent liabilities
Capitalization
Long-term debt	367,907	367,854
Common stock - authorized 1,000,000 shares of $100 par value; outstanding 933,000 shares	93,300	93,300
Additional paid in capital	187,071	187,071
Retained earnings	229,619	222,897
Accumulated other comprehensive loss	(552)	(590)
Total common stockholder's equity	509,438	502,678
Total liabilities and equity	$ 1,512,621	$ 1,526,528