The tunnel would be drilled under the lakebed in the Straits of Mackinac, and a new 4-mile segment of Line 5 would be installed inside.
But the project can’t move forward without a federal permit. The process to approve that permit is now being pushed back.
Enbridge says the company supports a thorough review of the project but is “disappointed” with the new timeline for a project of this scope.
The Army Corps initially planned to publish a draft environmental review this fall, but now says it’ll be released in the spring of 2025.
The permitting process will now likely be completed more than a year later than originally estimated.
