Balance Sheet (Unaudited) (USD $) In Thousands, unless otherwise specified	Jun. 30, 2012	Dec. 31, 2011
CURRENT ASSETS:
Cash	$ 240	$ 37
Receivables:
Trade	36,147	38,245
Affiliated companies	0	2,250
Advances to affiliate	61,462	52,024
Materials and supplies, less reserves of $59 at June 30, 2012 and $816 at December 31, 2011	10,049	10,488
Exchange gas due from others	1,145	3,441
Prepayments and other	4,447	3,469
Total current assets	113,490	109,954
PROPERTY, PLANT AND EQUIPMENT, at cost	3,120,625	3,068,915
Less-Accumulated depreciation	1,128,771	1,076,943
Total property, plant and equipment, net	1,991,854	1,991,972
OTHER ASSETS:
Deferred charges	8,742	10,250
Regulatory assets	59,394	59,605
Total other assets	68,136	69,855
Total assets	2,173,480	2,171,781
Payables:
Trade	16,848	13,634
Affiliated companies	13,441	8,812
Accrued liabilities:
Taxes, other than income taxes	11,622	10,252
Interest	4,045	4,045
Exchange gas due to others	2,126	10,472
Exchange gas offset	2,049	2,241
Other	3,940	5,006
Total current liabilities	54,071	54,462
LONG-TERM DEBT	693,929	693,831
DEFERRED CREDITS AND OTHER NONCURRENT LIABILITIES	105,540	103,041
CONTINGENT LIABILITIES AND COMMITMENTS (Note 3)
OWNER'S EQUITY:
Owner's capital	1,054,292	1,051,962
Retained earnings	265,403	268,209
Accumulated other comprehensive income	245	276
Total owner's equity	1,319,940	1,320,447
Total liabilities and owner's equity	$ 2,173,480	$ 2,171,781