Condensed Consolidated Balance Sheet (Unaudited) - USD ($) $ in Thousands	Jun. 30, 2016	Dec. 31, 2015
Current Assets:
Cash	$ 0	$ 0
Receivables:
Affiliates	1,614	1,084
Advances to affiliate	795,853	64,608
Trade and other, less allowance of $0 ($13 in 2015)	133,360	150,256
Transportation and exchange gas receivables	5,704	2,427
Inventories	51,415	56,841
Regulatory assets	85,871	79,575
Other	15,348	15,297
Total current assets	1,089,165	370,088
Investments, at cost plus equity in undistributed earnings	43,385	45,078
Property, Plant and Equipment:
Natural gas transmission plant	11,456,624	10,863,944
Less-Accumulated depreciation and amortization	3,584,482	3,471,775
Total property, plant and equipment, net	7,872,142	7,392,169
Other Assets:
Regulatory assets	257,714	263,730
Other	92,135	73,814
Total other assets	349,849	337,544
Total Assets	9,354,541	8,144,879
Payables:
Affiliates	26,197	38,243
Trade and other	257,280	223,050
Transportation and exchange gas payables	1,173	1,355
Accrued liabilities	164,390	109,230
Total current liabilities	449,040	371,878
Long-Term Debt	2,210,263	1,419,574
Other Long-Term Liabilities:
Asset retirement obligations	297,847	299,834
Regulatory liabilities	416,471	382,325
Advances for construction costs	193,682	97,790
Transportation prepayments	12,324	12,806
Other	4,787	4,819
Total other long-term liabilities	925,111	797,574
Contingent Liabilities and Commitments (Note 2)
Owner's Equity:
Member's capital	3,398,499	3,176,499
Retained earnings	2,371,943	2,379,385
Accumulated other comprehensive loss	(315)	(31)
Total owner's equity	5,770,127	5,555,853
Total liabilities and owner's equity	$ 9,354,541	$ 8,144,879