Balance Sheet (Unaudited) - USD ($) $ in Thousands	Mar. 31, 2019	Dec. 31, 2018
CURRENT ASSETS:
Cash	$ 0	$ 0
Receivables:
Trade	42,453	42,143
Affiliated companies	20	18
Advances to affiliate	210,481	180,400
Other	721	970
Materials and supplies	10,083	10,046
Exchange gas due from others	2,819	4,581
Prepayments and other	4,321	8,591
Total current assets	270,898	246,749
PROPERTY, PLANT AND EQUIPMENT, at cost	3,461,071	3,457,982
Less-Accumulated depreciation and amortization	1,615,476	1,596,369
Total property, plant and equipment, net	1,845,595	1,861,613
OTHER ASSETS:
Deferred charges	1,185	1,277
Right-of-use assets	17,481	0
Regulatory assets	23,300	23,992
Total other assets	41,966	25,269
Total assets	2,158,459	2,133,631
Payables:
Trade	9,359	12,839
Affiliated companies	8,559	26,532
Accrued liabilities:
Taxes, other than income taxes	13,326	11,496
Interest	12,019	5,505
Exchange gas due to others	4,815	11,660
Customer advances	555	788
Other	5,077	7,386
Total current liabilities	53,710	76,206
LONG-TERM DEBT	576,345	576,168
OTHER NONCURRENT LIABILITIES:
Asset retirement obligations	70,429	69,350
Regulatory liabilities	298,423	290,430
Lease liability	16,216	0
Other	707	835
Total other noncurrent liabilities	385,775	360,615
CONTINGENT LIABILITIES AND COMMITMENTS (Note 5)
MEMBER'S EQUITY:
Member's capital	1,073,892	1,073,892
Retained earnings	68,737	46,750
Total member's equity	1,142,629	1,120,642
Total liabilities and member's equity	$ 2,158,459	$ 2,133,631