Great Lakes Oil Pipeline Tunnel Faces Two-Year Army Corps Delay

Enbridge Inc.’s plan to build an oil pipeline tunnel underneath a key waterway in the Great Lakes suffered a setback on Thursday after the US Army Corps of Engineers delayed an environmental review of the project by two years.

The draft environmental impact statement on the Line 5 tunnel through the Straits of Mackinac — which connect Lake Michigan and Lake Huron — was originally set to be published in late 2023, but now won’t be released until spring 2025, the Army Corps said on its website.

Enbridge’s Line 5 carries oil from Wisconsin to Ontario and crosses Michigan’s upper ...