PROPERTY, PLANT AND EQUIPMENT (Tables)

12 Months Ended

Dec. 31, 2018

PROPERTY, PLANT AND EQUIPMENT

Schedule of property, plant and equipment

	2018				2017
			Accumulated	Net Book			Accumulated	Net Book
December 31 (millions of dollars)	Cost		Depreciation	Value	Cost		Depreciation	Value
Pipeline	1,901	-	(876)	1,025	2,577	-	(962)	1,615
Compression	550	-	(182)	368	533	-	(165)	368
Metering and other	176	-	(52)	124	182	-	(54)	128
Construction in progress	12	-	—	12	12	-	—	12
	2,639	-	(1,110)	1,529	3,304	-	(1,181)	2,123