Statement of Cash Flows (Unaudited) (USD $) In Thousands	6 Months Ended
Jun. 30, 2011	Jun. 30, 2010
OPERATING ACTIVITIES:
Net income	$ 75,062	$ 72,261
Adjustments to reconcile to net cash provided by operating activities -
Depreciation	45,101	43,903
Regulatory credits	(534)	(801)
Amortization of deferred charges and credits	859	1,905
Allowance for equity funds used during construction	(407)	(733)
Cash provided (used) by changes in current assets and liabilities:
Trade accounts receivable	4,541	6,133
Affiliated receivables	84	4,246
Exchange gas due from others	7,780	5,132
Materials and supplies	499	(460)
Other current assets	(1,320)	(465)
Trade accounts payable	(2,620)	(905)
Affiliated payables	3,650	(12,636)
Exchange gas due to others	(7,781)	(5,132)
Other accrued liabilities	2,821	1,382
Changes in noncurrent assets and liabilities:
Deferred charges	(1,130)	(1,924)
Other deferred credits	2,748	3,129
Net cash provided by operating activities	129,353	115,035
FINANCING ACTIVITIES:
Proceeds from issuance of long-term debt		8,000
Retirement of long-term debt		(8,000)
Capital contributions from parent	3,500	4,000
Distributions paid	(64,000)	(75,280)
Other	(1,424)	(3,361)
Net cash used in financing activities	(61,924)	(74,641)
Property, plant and equipment -
Capital expenditures	(36,245)	(34,438)
Proceeds from sales	1,150	2,680
Advances to affiliates	(32,332)	(8,975)
Net cash used in investing activities	(67,427)	(40,733)
NET INCREASE (DECREASE) IN CASH AND CASH EQUIVALENTS	2	(339)
CASH AND CASH EQUIVALENTS AT BEGINNING OF PERIOD	5	402
CASH AND CASH EQUIVALENTS AT END OF PERIOD	$ 7	$ 63

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