Enbridge’s Lake Pipeline Tunnel Faces Long Environmental Review

Enbridge Inc.’s embattled plan to build a tunnel under the Straits of Mackinac for its Line 5 oil pipeline will need a more thorough review from the U.S. Army Corps of Engineers, the latest setback for the project opposed by Michigan Governor Gretchen Whitmer.

The Army Corps said Wednesday that the project will require an environmental impact statement, which is lengthier than a simple environmental assessment. The EIS is appropriate because it could “significantly” affect the quality of the “human environment,” Jaime Pinkham, acting assistant secretary for the Army for Civil Works, said on the agency’s website.

The ...