Balance Sheet (Unaudited) (USD $) In Thousands, unless otherwise specified	Sep. 30, 2014	Dec. 31, 2013
CURRENT ASSETS:
Cash	$ 128	$ 133
Receivables:
Trade	39,114	42,776
Affiliated companies	4,363	40,427
Advances to affiliate	137,953	119,168
Other	5,967	1,627
Materials and supplies, less reserves of $17 at September 30, 2014 and $17 at December 31, 2013	10,095	10,269
Exchange gas due from others	2,987	2,751
Prepayments and other	2,954	3,555
Total current assets	203,561	220,706
PROPERTY, PLANT AND EQUIPMENT, at cost	3,264,489	3,205,576
Less-Accumulated depreciation	1,272,053	1,220,737
Total property, plant and equipment, net	1,992,436	1,984,839
OTHER ASSETS:
Deferred charges	5,081	6,408
Regulatory assets	52,977	58,141
Total other assets	58,058	64,549
Total assets	2,254,055	2,270,094
Payables:
Trade	19,906	24,013
Affiliated companies	9,539	11,136
Accrued liabilities:
Taxes, other than income taxes	16,520	10,974
Interest	15,155	4,045
Exchange gas due to others	5,064	5,847
Exchange gas offset	5,150	572
Customer advances	3,305	6,371
Other	2,936	1,965
Total current liabilities	77,575	64,923
LONG-TERM DEBT	694,371	694,224
OTHER NONCURRENT LIABILITIES:
Asset retirement obligations	93,138	60,753
Regulatory liabilities	22,293	19,252
Other	6,634	7,479
Total other noncurrent liabilities	122,065	87,484
CONTINGENT LIABILITIES AND COMMITMENTS (Note 2)
OWNER'S EQUITY:
Owner's capital	1,073,892	1,073,892
Retained earnings	286,046	349,419
Accumulated other comprehensive income	106	152
Total owner's equity	1,360,044	1,423,463
Total liabilities and owner's equity	$ 2,254,055	$ 2,270,094