MPSC determined that its review of the proposed four-mile Line 5 tunnel under the Straits of Mackinac should not include an examination of the entire 641-mile pipeline.

https://www.thecentersquare.com/michigan/michigan-public-service-commission-narrows-scope-of-line-5-review-will-allow-review-of-greenhouse/article_740dd910-a377-11eb-bb6a-5bc5ad00b900.html