Michigan Supreme Court Reinforces Public Trust Protections in Line 5 Tunnel Decision
On July 31, 2026, the Michigan Supreme Court vacated the Michigan Public Service Commission’s approval of Enbridge Energy’s proposed Line 5 tunnel beneath the Straits of Mackinac and returned the matter to the Commission for further proceedings. In re Application of Enbridge Energy to Replace and Relocate Line 5, Nos. 168335-9 and 168346 (Mich, July 31, 2026). The decision was 6-1, with Justice Welch writing for the majority and Justice Zahra concurring in part and dissenting in part.