Army Corps permits Enbridge Line 5 tunnel
Analysis based on 10 articles · First reported Aug 13, 2026 · Last updated Aug 13, 2026
The permit approval is a positive step for Enbridge, potentially reducing regulatory uncertainty and supporting the company's long-term operations in the Great Lakes region. However, ongoing legal battles and opposition from United States — Michigan and tribal groups could delay construction and create continued volatility for the project's timeline.
The U.S. Army Corps of Engineers issued a federal permit for Enbridge's Line 5 tunnel project in the United States — Straits of Mackinac, concluding the project is 'not contrary to the public interest' and does not impermissibly impair tribal treaty rights. The permit allows construction of a tunnel to house a section of the Line 5 petroleum pipeline beneath the lakebed. The Corps acknowledged adverse effects on endangered species and archaeological sites but deemed them mitigable. The decision aligns with the Trump administration's energy dominance agenda. However, the project still faces legal challenges: the United States — Michigan Supreme Court ordered the United States — Michigan Public Service Commission to reconsider its permit, and United States — Michigan Attorney General Dana Nessel continues to seek shutdown of the existing pipeline. Enbridge praised the decision, while opponents, including Native American tribes and environmental groups, condemned it. The project remains tied up in state and federal court, and new lawsuits are expected.
Set up alerts, explore entity relationships, search across thousands of events, and build custom intelligence feeds.
Open Dashboard