Mich. Tribes, Enviro Groups Challenge Line 5 Tunnel Permits

By Melanie Dorsey ( September 10, 2026, 9:32 PM EDT) -- Four Michigan Tribal Nations and four environmental groups on Thursday separately challenged state permits for Enbridge Energy LP's proposed Line 5 tunnel beneath the Straits of Mackinac, seeking to overturn approvals facing renewed scrutiny after a Michigan Supreme Court ruling required broader environmental review of the project....

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