Enbridge Inc’s 796,000 barrel per day Line 4, which carries crude oil from Edmonton, Alberta, to Clearbrook, MN, shutdown last Tuesday after a power outage, a company spokesman said.
The power outage stemmed from a failure on SaskPower’s transmission line feeding two pump stations in Saskatchewan, and Enbridge was working toward a Wednesday night start-up.
Line 4 transports heavy crude and is part of the Enbridge Mainline system which carries the bulk of Canadian crude exports to the United States.
There was a problem affecting an electricity transmission line to a pair of pump stations east of Regina in southern Saskatchewan, company spokesman Graham White said.
Saskatchewan Power Corp. which operates the transmission line, said several power poles connected to the Enbridge facilities ended up damaged by strong winds and icy conditions.
Line 4 is one of three major pipes that extends for 1,098 miles from Edmonton, Alberta to a major terminal in Superior, WI.