Balance Sheet (Unaudited) - USD ($) $ in Thousands	Mar. 31, 2020	Dec. 31, 2019
CURRENT ASSETS:
Cash	$ 0	$ 0
Receivables:
Trade	38,677	40,066
Affiliated companies	80	109
Advances to affiliate	234,687	201,265
Other	912	1,962
Materials and supplies	9,770	9,683
Exchange gas due from others	2,260	5,534
Prepayments and other	2,781	3,346
Total current assets	289,167	261,965
PROPERTY, PLANT AND EQUIPMENT, at cost	3,594,941	3,593,186
Less-Accumulated depreciation and amortization	1,697,283	1,673,315
Total property, plant and equipment, net	1,897,658	1,919,871
OTHER ASSETS:
Deferred charges	1,595	1,075
Right-of-use assets	21,320	21,935
Regulatory assets	17,754	18,101
Total other assets	40,669	41,111
Total assets	2,227,494	2,222,947
Payables:
Trade	8,634	15,635
Affiliated companies	7,864	9,172
Accrued liabilities:
Taxes, other than income taxes	12,426	9,913
Interest	12,019	5,505
Exchange gas due to others	684	4,468
Customer advances	6,872	4,109
Other	4,902	6,990
Total current liabilities	53,401	55,792
LONG-TERM DEBT	577,284	577,045
OTHER NONCURRENT LIABILITIES:
Asset retirement obligations	92,590	91,251
Regulatory liabilities	331,161	323,032
Lease liability	16,498	16,823
Other	5,447	5,695
Total other noncurrent liabilities	445,696	436,801
CONTINGENT LIABILITIES AND COMMITMENTS (Note 3)
MEMBER'S EQUITY:
Member's capital	1,073,892	1,073,892
Retained earnings	77,221	79,417
Total member's equity	1,151,113	1,153,309
Total liabilities and member's equity	$ 2,227,494	$ 2,222,947