FLOW Appeals MPSC Permit to Site Replacement Line 5 Pipeline in Proposed Great Lakes Tunnel

Media Release: January 3, 2024

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Traverse City, Mich.— For Love of Water (FLOW), a Great Lakes water law and policy center, filed an appeal on December 22, 2023 with the Michigan Court of Appeals to overturn the Michigan Public Service Commission’s December 1 decision to approve the application from Canadian oil company Enbridge to relocate its twin Line 5 crude oil and natural gas liquids (NGLs) pipelines to a proposed new underground tunnel. Line 5 currently spans 4.5 miles on the lakebed floor of the Straits of Mackinac.

In its approval, the MPSC dismissed alternatives to routing Line 5 through the Straits. However, recent industry reports show that there are a range of commercially feasible and operationally viable alternatives to transport crude and NGLs in the event of a Line 5 shutdown. These alternatives include leveraging excess capacity in existing pipelines that do not run through the waters of the Great Lakes.

FLOW contends that the Commission’s decision to permit relocating Line 5 to a yet-to-be-approved tunnel violates the Michigan Environmental Protection Act (MEPA). MEPA requires all agencies to determine if a proposed project is likely to impact the air, water, and natural resources, or public trust in those resources, and to deny approval when, as here, there are feasible and prudent alternatives.

Multiple studies demonstrate that the North American energy market is flexible, adaptable, and resilient, and that Line 5 could be decommissioned without causing supply shortages or price spikes. It is clear that the region has the capacity for a planned and orderly transition to shut down Line 5 and to protect the Great Lakes – which comprise 95% of North America’s fresh surface water – from a catastrophic oil spill. Since 2017, large energy firms and refineries have developed contingency plans for a Line 5 shut down.

Enbridge has yet to obtain the required federal authorization from the US Army Corps of Engineers to construct this mega-infrastructure tunnel project. A final environmental impact statement is expected from the Army Corps in spring of 2026, following public meetings and comment period in 2025.

“Because the Snyder administration cut a deal in 2018 to let Enbridge continue to use the vulnerable dual pipelines in the Straits until a tunnel is built, the State unlawfully and prematurely gave the green-light to Enbridge to operate Line 5 for another 99 years,” James Olson, Sr. Legal Advisor and attorney for FLOW said. “This has poisoned decisions by state agencies, most recently the MPSC, to assume that they don’t have to consider the risks, effects, and alternatives to the continued operation of Line 5.”

FLOW, and other organizations and tribes who have appealed the Commission’s December 1 order will ask the Court of Appeals to overturn the decision and require the Commission to apply the rule of law under MEPA and consider feasible and prudent alternatives to the tunnel and reevaluate its improper, short-sighted commitment to this major piece of new fossil fuels infrastructure in the face of undeniable climate change impacts and risks.

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Contact: Liz Kirkwood, Executive Director
Phone: (231) 944-1568


December 1, 2023: Disgraceful: MPSC Approves Permit for Enbridge Tunnel in the Straits of Mackinac; Breaches Legal Duty to Protect Michigan’s Natural Resources

November 17, 2023: What happens when Line 5 is shut down? A report on energy market impacts

March 16, 2022: FLOW to Michigan Public Service Commission: No Enbridge Oil Tunnel Without Authorization Under Public Trust Doctrine

One comment on “FLOW Appeals MPSC Permit to Site Replacement Line 5 Pipeline in Proposed Great Lakes Tunnel

  1. leonard page on

    i am glad to see that FLOW is appealing the MPSC decision. I had high hopes that the decision would follow the 2010 decision rejecting approval for the proposed Rogers City coal fired power plant. I refused to support a cheboygan county resolution in support of that venture and it cost me re-election. as you may recall, the state decision was that Michigan did not NEED this new plant -particularly one powered by pet coke. I know i am preaching to the choir–but Michigan similarly has no NEED for line 5 products. I am also surprised at how quickly the MPSC dismissed concerned express by Gary street, Krupewicz and O’Mara about the explosive risk of an NGL leak inside the tunnel. the risk of an ngl leak cannot be so totally ignored.


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