Statement of Comprehensive Income (Unaudited) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2012	Sep. 30, 2011	Sep. 30, 2012	Sep. 30, 2011
STATEMENT OF COMPREHENSIVE INCOME
Operating Revenues	$ 107,643	$ 107,216	$ 325,326	$ 323,711
OPERATING EXPENSES:
General and administrative	17,250	13,647	51,138	42,150
Operation and maintenance	20,061	20,811	55,477	55,794
Depreciation	23,245	22,515	69,780	67,616
Regulatory credits	(37)	(266)	(441)	(800)
Taxes, other than income taxes	4,741	4,427	14,519	15,041
Total operating expenses	65,260	61,134	190,473	179,801
Operating Income	42,383	46,082	134,853	143,910
OTHER (INCOME) AND OTHER DEDUCTIONS:
Interest on long-term debt	11,110	11,110	33,329	33,329
Other interest	563	492	1,524	1,506
Allowance for equity and borrowed funds used during construction	(724)	(874)	(1,777)	(1,468)
Miscellaneous other (income) deductions, net	220	113	369	240
Total other (income) and other deductions	11,169	10,841	33,445	33,607
NET INCOME	31,214	35,241	101,408	110,303
CASH FLOW HEDGES:
Amortization of cash flow hedges	(15)	(16)	(46)	(47)
COMPREHENSIVE INCOME	$ 31,199	$ 35,225	$ 101,362	$ 110,256