CALGARY, Alberta (Reuters) - A power outage in Illinois has forced Enbridge Inc to cut flows on its 670,000 barrel-a-day Line 6A by about a third, market sources said on Friday.
The power interruption on Thursday knocked a pump station and terminal at Lockport, Illinois, off line, and sources said the terminal was back in operation with back-up electricity.
Crews for the local utility were said to be assessing the situation. Enbridge officials were not immediately available for comment.
The company, which operates the main pipeline network for Canadian crude exports to the United States, has struggled with outages for months, beginning with the rupture and oil spill of Line 6B in Michigan in July.
That pipeline, which moves 290,000 barrels a day to Sarnia, Ontario, from Griffith, Indiana, was down for nine weeks. It was down for about a week this month as well as Enbridge inspected potential troubles spots. It returned to service on Thursday.
6A, which extends to Griffith from Superior, Wisconsin, was down for about a day in early November as the company investigated high-pressure alarms.
Reporting by Jeffrey Jones; Editing by Lisa Shumaker