Balance Sheet (Unaudited) - USD ($) $ in Thousands	Sep. 30, 2021	Dec. 31, 2020
CURRENT ASSETS:
Cash	$ 0	$ 0
Receivables:
Trade	34,119	37,365
Affiliated companies	170	51
Advances to affiliate	292,630	247,869
Other	1,156	840
Materials and supplies	9,678	9,807
Exchange gas due from others	9,310	4,466
Prepayments and other	4,488	4,078
Total current assets	351,551	304,476
PROPERTY, PLANT AND EQUIPMENT	3,730,124	3,653,792
Less-Accumulated depreciation and amortization	1,836,617	1,761,229
Total property, plant and equipment, net	1,893,507	1,892,563
OTHER ASSETS:
Deferred charges and other non-current assets	9,882	3,775
Regulatory assets	18,442	20,022
Right-of-use assets	10,548	10,692
Total other assets	38,872	34,489
Total assets	2,283,930	2,231,528
Payables:
Trade	23,230	16,157
Affiliated companies	15,845	4,110
Accrued liabilities:
Taxes, other than income taxes	15,575	10,905
Interest	12,019	5,505
Exchange gas due to others	5,761	4,557
Customer advances	2,668	539
Other	7,508	6,786
Total current liabilities	82,606	48,559
LONG-TERM DEBT	578,773	578,018
OTHER NON-CURRENT LIABILITIES:
Asset retirement obligations	121,041	95,777
Regulatory liabilities	380,298	355,725
Lease liability	8,335	8,341
Other	3,908	4,713
Total other non-current liabilities	513,582	464,556
CONTINGENT LIABILITIES AND COMMITMENTS (Note 3)
MEMBER'S EQUITY:
Member's capital	1,073,892	1,073,892
Retained earnings	35,077	66,503
Total member's equity	1,108,969	1,140,395
Total liabilities and member's equity	$ 2,283,930	$ 2,231,528