PLANT, PROPERTY AND EQUIPMENT (Tables)

12 Months Ended

Dec. 31, 2017

PLANT, PROPERTY AND EQUIPMENT

Schedule of plant, property and equipment

	2017				2016(a)
		Accumulated		Net Book		Accumulated		Net Book
December 31 (millions of dollars)	Cost	Depreciation		Value	Cost	Depreciation		Value
Pipeline	2,577	(962	)	1,615	2,540	(879	)	1,661
Compression	533	(165	)	368	519	(148	)	371
Metering and other	182	(54	)	128	205	(61	)	144
Construction in progress	12	–		12	4	–		4
	3,304	(1,181	)	2,123	3,268	(1,088	)	2,180

(a) Recast to consolidate PNGTS (Refer to Notes 2 and 7).