Enbridge Finds Gaps in Protective Coating on Michigan Pipeline
Traverse City, Mich. (AP) — Enbridge said Tuesday it had discovered four spots on an oil pipeline in Michigan's Straits of Mackinac where protective coating has worn away, leaving bare metal exposed.
The Canadian company said crews noticed the spots this month while installing screw anchors to secure sections of its Line 5 in the channel linking Lakes Huron and Michigan.
“We immediately inspected the line with remotely operated vehicles and with divers and determined there are no integrity issues and Line 5 remains safe," spokesman Ryan Duffy said.
Each spot is less than 6 square inches in size and will be repaired within the next 10 days, he said. They are on the east segment of Line 5, which divides into two pipes when crossing the bottom of the straits.
The entire 67-year-old pipeline runs from Superior, Wisconsin, to Sarnia, Ontario.
Enbridge previously has fixed several other places on the underwater pipelines with coating gaps.
The company plans to replace the underwater portion of Line 5 with a new segment that would extend through a tunnel to be drilled beneath the straits.
Environmental groups oppose the tunnel project and want Line 5 shut down, as Michigan Attorney General Dana Nessel demanded in a lawsuit pending in Ingham County Circuit Court. A judge heard arguments in the case last week.
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