Balance Sheet (Unaudited) - USD ($) $ in Thousands	Sep. 30, 2015	Dec. 31, 2014
CURRENT ASSETS:
Cash	$ 140	$ 154
Receivables:
Trade	39,282	42,759
Affiliated companies	1,493	2,039
Advances to affiliate	187,358	135,054
Other	2,981	1,249
Materials and supplies	10,214	10,066
Exchange gas due from others	1,935	4,184
Exchange gas offset	1,852	0
Prepayments and other	6,509	4,881
Total current assets	251,764	200,386
PROPERTY, PLANT AND EQUIPMENT, at cost	3,297,996	3,269,617
Less-Accumulated depreciation	1,354,632	1,288,530
Total property, plant and equipment, net	1,943,364	1,981,087
OTHER ASSETS:
Deferred charges	3,700	4,700
Regulatory assets	44,703	49,923
Total other assets	48,403	54,623
Total assets	2,243,531	2,236,096
Payables:
Trade	21,094	12,709
Affiliated companies	8,742	13,143
Accrued liabilities:
Taxes, other than income taxes	16,404	11,246
Interest	15,155	4,045
Exchange gas due to others	2,667	6,406
Exchange gas offset	0	3,941
Customer advances	5,139	2,363
Other	2,207	1,799
Long-term debt due within one year	174,961	0
Total current liabilities	246,369	55,652
LONG-TERM DEBT	519,607	694,420
OTHER NONCURRENT LIABILITIES:
Asset retirement obligations	80,596	94,678
Regulatory liabilities	25,945	23,375
Other	8,279	8,017
Total other noncurrent liabilities	$ 114,820	$ 126,070
CONTINGENT LIABILITIES AND COMMITMENTS (Note 2)
OWNER'S EQUITY:
Owner's capital	$ 1,073,892	$ 1,073,892
Retained earnings	288,799	285,972
Accumulated other comprehensive income	44	90
Total owner's equity	1,362,735	1,359,954
Total liabilities and owner's equity	$ 2,243,531	$ 2,236,096