PLANT, PROPERTY AND EQUIPMENT (Tables)

12 Months Ended

Dec. 31, 2016

PLANT, PROPERTY AND EQUIPMENT

Schedule of plant, property and equipment

	2016				2015
December 31 (millions of dollars)	Cost	Accumulated Depreciation		Net Book Value	Cost	Accumulated Depreciation		Net Book Value
Pipeline	2,091	(701	)	1,390	2,086	(638	)	1,448
Compression	519	(148	)	371	516	(134	)	382
Metering and other	159	(43	)	116	156	(39	)	117
Construction in progress	4	–		4	2	–		2
	2,773	(892	)	1,881	2,760	(811	)	1,949