Balance Sheet (Unaudited) - USD ($) $ in Thousands	Sep. 30, 2018	Dec. 31, 2017
CURRENT ASSETS:
Cash	$ 0	$ 0
Receivables:
Trade	37,062	38,884
Affiliated companies	31	1,921
Advances to affiliate	219,266	137,666
Other	1,011	2,618
Materials and supplies	10,117	10,084
Exchange gas due from others	1,554	2,720
Prepayments and other	2,110	6,423
Total current assets	271,151	200,316
PROPERTY, PLANT AND EQUIPMENT, at cost	3,444,227	3,396,776
Less-Accumulated depreciation and amortization	1,575,862	1,508,245
Total property, plant and equipment, net	1,868,365	1,888,531
OTHER ASSETS:
Deferred charges	632	934
Regulatory assets	24,008	22,747
Total other assets	24,640	23,681
Total assets	2,164,156	2,112,528
Payables:
Trade	15,507	11,053
Affiliated companies	11,588	11,298
Accrued liabilities:
Taxes, other than income taxes	16,530	11,617
Interest	12,019	3,677
Exchange gas due to others	2,903	4,500
Exchange gas offset	51	1,499
Customer advances	509	2,092
Other	3,128	6,655
Long-term debt due within one year	0	249,874
Total current liabilities	62,235	302,265
LONG-TERM DEBT	576,494	331,748
OTHER NONCURRENT LIABILITIES:
Asset retirement obligations	68,289	67,100
Regulatory liabilities	282,260	246,504
Other	1,626	1,730
Total other noncurrent liabilities	352,175	315,334
CONTINGENT LIABILITIES AND COMMITMENTS (Note 4)
MEMBER'S EQUITY:
Member's capital	1,073,892	1,073,892
Retained earnings	99,360	89,289
Total member's equity	1,173,252	1,163,181
Total liabilities and member's equity	$ 2,164,156	$ 2,112,528