The Army Corps of Engineers issued a key permit for Enbridge's plan to replace an aging Line 5 pipeline segment beneath the Straits of Mackinac with a tunnel-buried replacement, fast-tracked under Trump's national energy emergency order.
The agency's own review found the tunnel construction would cause permanent adverse impacts to wetlands, vegetation, land use, and cultural resources sacred to Anishaabe peoples, including burial grounds and treaty-protected fishing waters — yet concluded the project served the public interest and didn't impair tribal treaty rights.
Seven Michigan tribal nations withdrew from the permit process last year citing ignored expertise and undermined treaty rights; state permits, including a pending wastewater discharge decision and a Michigan Supreme Court-ordered do-over, still stand between Enbridge and construction.
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