Condensed Consolidated Balance Sheet (Unaudited) - USD ($) $ in Thousands	Sep. 30, 2016	Dec. 31, 2015
Current Assets:
Cash	$ 0	$ 0
Receivables:
Affiliates	743	1,084
Advances to affiliate	782,887	64,608
Trade and other, less allowance of $0 ($13 in 2015)	133,211	150,256
Transportation and exchange gas receivables	2,643	2,427
Inventories	43,224	56,841
Regulatory assets	85,334	79,575
Other	17,241	15,297
Total current assets	1,065,283	370,088
Investments, at cost plus equity in undistributed earnings	42,880	45,078
Property, Plant and Equipment:
Natural gas transmission plant	11,690,511	10,863,944
Less-Accumulated depreciation and amortization	3,634,224	3,471,775
Total property, plant and equipment, net	8,056,287	7,392,169
Other Assets:
Regulatory assets	254,153	263,730
Other	98,386	73,814
Total other assets	352,539	337,544
Total Assets	9,516,989	8,144,879
Payables:
Affiliates	17,024	38,243
Trade and other	240,577	223,050
Transportation and exchange gas payables	2,490	1,355
Accrued liabilities	181,008	109,230
Total current liabilities	441,099	371,878
Long-Term Debt	2,210,579	1,419,574
Other Long-Term Liabilities:
Asset retirement obligations	222,594	299,834
Regulatory liabilities	431,740	382,325
Advances for construction costs	231,516	97,790
Transportation prepayments	12,081	12,806
Other	5,184	4,819
Total other long-term liabilities	903,115	797,574
Contingent Liabilities and Commitments (Note 2)
Owner's Equity:
Member's capital	3,548,499	3,176,499
Retained earnings	2,413,856	2,379,385
Accumulated other comprehensive loss	(159)	(31)
Total owner's equity	5,962,196	5,555,853
Total liabilities and owner's equity	$ 9,516,989	$ 8,144,879