Balance Sheet (Unaudited) - USD ($) $ in Thousands	Jun. 30, 2015	Dec. 31, 2014
CURRENT ASSETS:
Cash	$ 189	$ 154
Receivables:
Trade	38,809	42,759
Affiliated companies	1,510	2,039
Advances to affiliate	161,147	135,054
Other	1,345	1,249
Materials and supplies	10,141	10,066
Exchange gas due from others	2,584	4,184
Prepayments and other	7,633	4,881
Total current assets	223,358	200,386
PROPERTY, PLANT AND EQUIPMENT, at cost	3,292,073	3,269,617
Less-Accumulated depreciation	1,332,545	1,288,530
Total property, plant and equipment, net	1,959,528	1,981,087
OTHER ASSETS:
Deferred charges	3,940	4,700
Regulatory assets	46,298	49,923
Total other assets	50,238	54,623
Total assets	2,233,124	2,236,096
Payables:
Trade	12,840	12,709
Affiliated companies	8,595	13,143
Accrued liabilities:
Taxes, other than income taxes	12,420	11,246
Interest	4,045	4,045
Exchange gas due to others	2,343	6,406
Exchange gas offset	869	3,941
Customer advances	2,803	2,363
Other	2,203	1,799
Long-term debt due within one year	174,947	0
Total current liabilities	221,065	55,652
LONG-TERM DEBT	519,572	694,420
OTHER NONCURRENT LIABILITIES:
Asset retirement obligations	98,051	94,678
Regulatory liabilities	25,088	23,375
Other	8,908	8,017
Total other noncurrent liabilities	$ 132,047	$ 126,070
CONTINGENT LIABILITIES AND COMMITMENTS (Note 2)
OWNER'S EQUITY:
Owner's capital	$ 1,073,892	$ 1,073,892
Retained earnings	286,489	285,972
Accumulated other comprehensive income	59	90
Total owner's equity	1,360,440	1,359,954
Total liabilities and owner's equity	$ 2,233,124	$ 2,236,096