Statement of Net Income (Unaudited) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
OPERATING REVENUES:
Natural gas transportation	$ 109,277	$ 112,021
Natural gas storage	3,670	3,346
Other	(53)	(21)
Total operating revenues	112,894	115,346
OPERATING EXPENSES:
General and administrative	11,670	12,699
Operation and maintenance	16,646	15,499
Depreciation and amortization	28,068	28,060
Regulatory debits	348	291
Taxes, other than income taxes	4,216	4,120
Regulatory charges resulting from tax rate changes	5,814	5,814
Other (income) expenses, net	(31)	(2)
Total operating expenses	66,731	66,481
OPERATING INCOME	46,163	48,865
OTHER (INCOME) AND OTHER EXPENSES:
Interest expense	7,361	7,451
Allowance for equity and borrowed funds used during construction (AFUDC)	(265)	(298)
Miscellaneous other (income) expenses, net	(161)	(1,092)
Total other (income) and other expenses	6,935	6,061
NET INCOME	$ 39,228	$ 42,804