Tribes: Flawed Line 5 Review Breaks Treaty Promises

Michigan tribal nations are pushing back against the federal environmental review of Enbridge's Line 5 tunnel project, arguing the process fails to account for treaty-protected fishing and water rights in the Straits of Mackinac. The dispute is as much about procedure as about the pipeline itself, and it is rapidly becoming a defining test of how infrastructure decisions are made in the Great Lakes region.

At the heart of the complaint is the scope of the review. Tribal leaders contend the federal analysis treats the tunnel as a straightforward engineering project, weighing spill risks and construction logistics while sidelining the broader question of what the pipeline's continued operation means for lands and waters guaranteed by 19th-century treaties. That framing, they argue, converts a sovereignty issue into a permitting issue — and in doing so, the review misses the very obligations that make tribal consultation meaningful rather than ceremonial.

A precedent beyond the Straits

The stakes extend well beyond Michigan's shoreline. If federal agencies can complete a major infrastructure review without meaningfully resolving tribal objections, other projects across the region could follow the same template. For businesses, that creates a different kind of risk: not physical disruption, but legal and reputational exposure that can surface years after permits are issued, when opposition hardens into litigation and political pressure.

For Enbridge, the immediate concern is delay, but the deeper issue is legitimacy. A permit that tribes view as illegitimate invites sustained legal challenges and public scrutiny no matter how sound the engineering. The tribes' insistence on treaty rights is not a side issue to the business case — it is increasingly central to it. Until the review grapples with that reality, the project's future remains uncertain on terms no environmental assessment can resolve on its own.