Balance Sheet (USD $) In Thousands, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012
CURRENT ASSETS:
Cash	$ 133	$ 117
Receivables:
Trade	42,776	39,836
Affiliated companies	40,427	1,683
Advances to affiliate	119,168	29,322
Other	1,627	6,700
Materials and supplies, less reserves of $17 at December 31, 2013 and $81 at December 31, 2012	10,269	10,137
Exchange gas due from others	2,751	3,426
Exchange gas offset	0	1,277
Prepayments and other	3,555	3,353
Total current assets	220,706	95,851
PROPERTY, PLANT AND EQUIPMENT, at cost	3,205,576	3,163,489
Less-Accumulated depreciation	1,220,737	1,159,944
Total property, plant and equipment, net	1,984,839	2,003,545
OTHER ASSETS:
Deferred charges	6,408	7,918
Regulatory assets	58,141	60,298
Total other assets	64,549	68,216
Total assets	2,270,094	2,167,612
Payables:
Trade	24,013	18,383
Affiliated companies	11,136	10,912
Accrued liabilities:
Taxes, other than income taxes	10,974	10,961
Interest	4,045	4,045
Exchange gas due to others	5,847	6,572
Exchange gas offset	572	0
Customer advances	6,371	2,232
Other	1,965	2,235
Total current liabilities	64,923	55,340
LONG-TERM DEBT	694,224	694,027
OTHER NONCURRENT LIABILITIES:
Asset retirement obligations	60,753	67,557
Regulatory liabilities	19,252	17,395
Other	7,479	5,055
Total other noncurrent liabilities	87,484	90,007
CONTINGENT LIABILITIES AND COMMITMENTS (Note 3)
OWNER'S EQUITY:
Owner's capital	1,073,892	1,060,592
Retained earnings	349,419	267,432
Accumulated other comprehensive income	152	214
Total owner's equity	1,423,463	1,328,238
Total liabilities and owner's equity	$ 2,270,094	$ 2,167,612