Full Breakdown
Michigan Gov. Whitmer Orders New Review of Line 5 Tunnel Permits After Supreme Court Ruling
By Drooid · · How we work
Core Event: State Review Triggered by Court Decision
On July 15, the Michigan Department of Environment, Great Lakes and Energy (EGLE) issued a water-resources permit for Enbridge Energy’s proposed tunnel beneath the Straits of Mackinac. Two weeks later, the Michigan Supreme Court vacated a separate tunnel permit, finding the commission had not fully considered environmental impacts or alternatives. Governor Gretchen Whitmer and EGLE Director Phil Roos said the agency will re-examine the July 15 permit to meet the court’s standards. Whitmer also sent a letter to Enbridge President Gregory Ebel urging the company to pursue alternatives that do not rely on the tunnel.
Background & Context
Line 5 is a 73-year-old dual pipeline that runs across the bottom of the Straits of Mackinac. Whitmer campaigned on shutting it down after anchor strikes raised spill concerns. Enbridge argues the tunnel—first proposed in 2018 with a 2024 target—would reduce spill risk while preserving energy access. The project has faced legal challenges from tribal nations, environmental groups, and local communities.
Timeline
- July 15 2024 – EGLE issues a resource permit after a 16-month review and more than 70,000 public comments.
- July 31 2024 – Michigan Supreme Court vacates the Michigan Public Service Commission’s tunnel permit, citing insufficient analysis.
Data & Statistics
- Line 5 pipelines have been in place for 73 years.
- Permit review spanned 16 months with over 70,000 public comments.
- The tunnel was pitched in 2018 with a projected 2024 completion, now delayed.
Official Statements & Responses
Whitmer called the pipelines a “ticking time bomb” and urged an “orderly transition” away from the Straits. Labor groups defended the tunnel; Brent Pilarski of the Michigan Laborers District Council called Whitmer’s actions “puzzling” and a “slap in the face” of skilled tradespeople.
Criticism & Opposition
Union and business representatives argue that delaying the tunnel jeopardizes jobs and energy reliability. Tribal leaders and environmental advocates view the renewed review as a victory for treaty rights and freshwater protection, urging alternatives that do not rely on a new tunnel.
Why It Matters / Impact
The re-evaluation sets a precedent for Michigan’s environmental reviews of large infrastructure projects, potentially extending scrutiny to other proposals affecting the Great Lakes and public-trust resources. For tribal nations, the decision reinforces treaty-protected water rights. For the energy sector, the outcome will influence the timeline and feasibility of replacing aging pipelines with underground alternatives.
Conflicting Reports & Gaps
State officials expect a final decision on the water-resources permit “by the end of September,” but no firm deadline has been set. It remains unclear how the court’s ruling will affect a separate wastewater permit already under review.
Verbatim Quotes
- “The Michigan Supreme Court has made clear that the state must more thoroughly scrutinize the environmental consequences of the proposed tunnel and the alternatives to it,” — Gov. Gretchen Whitmer
- “We continue to stand ready to meet with the Governor to look at ways that protect Michigan’s natural resources while ensuring the continued safe operation of critical energy infrastructure,” — Ryan Duffy, Enbridge spokesperson
What’s Next
Michigan regulators will complete the revised review of the July 15 permit in the coming weeks and issue a determination on whether construction can proceed. The decision will likely influence ongoing federal litigation between Enbridge and the state, as well as parallel actions brought by Attorney General Dana Nessel and tribal groups.
