Statement of Comprehensive Income (Unaudited) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
OPERATING REVENUES:
Natural gas transportation	$ 106,425	$ 112,903	$ 320,499	$ 342,494
Natural gas storage	3,239	3,274	9,369	9,252
Other	15	11	16	37
Revenues	109,679	116,188	329,884	351,783
OPERATING EXPENSES:
General and administrative	11,355	12,527	35,892	40,028
Operation and maintenance	19,638	21,294	53,557	55,817
Depreciation	26,657	25,516	79,466	76,345
Regulatory Debits	372	1,211	2,219	3,672
Taxes, other than income taxes	3,786	4,056	12,893	13,043
Regulatory charges resulting from tax rate changes	17,585	0	29,737	0
Other expense, net	40	0	399	0
Total operating expenses	79,433	64,604	214,163	188,905
OPERATING INCOME	30,246	51,584	115,721	162,878
OTHER (INCOME) AND OTHER EXPENSES:
Interest expense	5,417	8,139	20,923	24,950
Allowance for equity and borrowed funds used during construction (AFUDC)	(632)	(587)	(1,619)	(1,099)
Miscellaneous other (income) expenses, net	7	(30)	(654)	184
Total other (income) and other expenses	4,792	7,522	18,650	24,035
NET INCOME	25,454	44,062	97,071	138,843
Other comprehensive income (loss)	0	0	0	0
COMPREHENSIVE INCOME	$ 25,454	$ 44,062	$ 97,071	$ 138,843