Consolidated Balance Sheet - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018
Current Assets:
Cash	$ 0	$ 0
Receivables:
Trade	242,416	190,833
Affiliates	669	1,018
Advances to affiliate	0	33,034
Other	10,850	10,365
Transportation and exchange gas receivables	6,360	4,515
Inventories:
Gas in storage, at original cost	857	875
Gas available for customer nomination, at average cost	20,653	25,767
Materials and supplies, at average cost	43,482	36,563
Regulatory assets	69,440	95,770
Other	11,240	12,574
Total current assets	405,967	411,314
Investments, at cost plus equity in undistributed earnings	0	26,520
Property, Plant and Equipment:
Natural gas transmission plant	16,764,904	15,908,878
Less-Accumulated depreciation and amortization	4,438,077	4,147,729
Total property, plant and equipment, net	12,326,827	11,761,149
Other Assets:
Regulatory assets	290,923	289,479
Right-of-use assets	84,979	0
Other	210,017	167,490
Total other assets	585,919	456,969
Total assets	13,318,713	12,655,952
Payables:
Trade	155,676	201,350
Affiliates	47,740	50,727
Advances from affiliate	252,549	0
Cash overdrafts	28,292	25,561
Transportation and exchange gas payables	3,961	5,973
Reserve for rate refunds	188,842	0
Accrued liabilities:
Property and other taxes	19,034	15,428
Interest	70,572	62,066
Regulatory liabilities	57,359	5,097
Customer deposits	30,551	36,400
Customer advances	27,207	36,642
Asset retirement obligations	32,704	45,714
Other	19,060	22,134
Long-term debt due within one year	20,180	15,419
Total current liabilities	953,727	522,511
Long-Term Debt	4,044,790	3,998,988
Other Long-Term Liabilities:
Asset retirement obligations	426,505	348,609
Regulatory liabilities	966,961	1,026,892
Advances for construction costs	16,533	211
Deferred revenue	215,598	226,164
Lease liability	84,528	0
Other	4,288	3,977
Total other long-term liabilities	1,714,413	1,605,853
Contingent Liabilities and Commitments (Note 4)
Member's Equity:
Member's capital	4,428,499	4,428,499
Retained earnings	2,177,284	2,099,567
Accumulated other comprehensive income	0	534
Total member's equity	6,605,783	6,528,600
Total liabilities and member's equity	$ 13,318,713	$ 12,655,952