Straits of Mackinac
The U.S. Army Corps of Engineers, Detroit District Regulatory Office issued a nationwide permit verification to Enbridge Pipelines, LLC, on October 18, 2016, which authorizes maintenance to the Line 5 submerged pipeline crossing of the Straits of Mackinac.

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Photo by: RICHARD MACDONALD |  VIRIN: 161019-A-CE999-657.JPG