Balance Sheet (Unaudited) (USD $) In Thousands	Jun. 30, 2011	Dec. 31, 2010
CURRENT ASSETS:
Cash and cash equivalents	$ 7	$ 5
Advances to affiliate	77,377	45,045
Accounts receivable:
Trade	33,974	38,515
Affiliated companies	2,034	2,118
Materials and supplies, less reserves of $39 at June 30, 2011 and $613 at December 31, 2010	11,220	11,719
Exchange gas due from others	2,778	2,323
Exchange gas offset	917	3,854
Prepayments and other	4,735	3,415
Total current assets	133,042	106,994
PROPERTY, PLANT AND EQUIPMENT, at cost	2,990,014	2,965,097
Less-Accumulated depreciation	1,054,705	1,017,634
Total property, plant and equipment, net	1,935,309	1,947,463
OTHER ASSETS:
Deferred charges	10,751	11,817
Regulatory assets	59,849	60,176
Total other assets	70,600	71,993
Total assets	2,138,951	2,126,450
Accounts payable-
Trade	9,738	13,177
Affiliated companies	13,755	10,105
Accrued liabilities-
Taxes, other than income taxes	12,021	10,186
Interest	4,045	4,045
Exchange gas due to others	5,334	13,115
Other	5,230	4,245
Total current liabilities	50,123	54,873
LONG-TERM DEBT	693,732	693,634
DEFERRED CREDITS AND OTHER NONCURRENT LIABILITIES	90,969	88,347
CONTINGENT LIABILITIES AND COMMITMENTS (Note 2)
OWNER'S EQUITY:
Owner's capital	1,050,362	1,046,862
Retained earnings	253,458	242,396
Accumulated other comprehensive income	307	338
Total owner's equity	1,304,127	1,289,596
Total liabilities and owner's equity	$ 2,138,951	$ 2,126,450