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Line 5 and the Great Lakes Tunnel


Welcome to Enbridge's Line 5 landing page, with information on our Great Lakes Tunnel Project in the Straits of Mackinac as well as our existing Line 5 pipeline in Michigan.

Explore this resource to find out operational and project details, separate fact from fiction, ask questions, and learn more about our ongoing investment in communities across Michigan.

You can also find out more about the suite of safety precautions we take to protect Michigan’s waters—while also ensuring an uninterrupted supply of reliable, affordable energy that Michigan needs.

Line 5 in the news
‘Line 5 is essential to steady oil supply’

March 10, 2022: “Imagine how much worse the impact of the energy crisis would be” with Line 5 closure: Detroit News

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Line 5 disruption ‘would have a devastating impact’

Nov. 22, 2021: DeWine, Husted tell President Biden a Line 5 shutdown would eliminate thousands of jobs.

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Analysis: Line 5 shutdown would cost the region $20B+

May 10, 2021: CEA warns Whitmer’s “reckless” move would put 33,000+ jobs in peril.

:Learn more
The need for Line 5
Without Line 5?
Job losses. Propane shortages. A $5-billion hit to the regional economy. And a threat to energy security.
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Line 5 and the Great Lakes Tunnel: Virtual Open House

Learn more about the Great Lakes Tunnel Project and the benefits of Line 5.

Our Enbridge Line 5 Virtual Open House offers a variety of videos, animations and interactive opportunities. This experience provides information on our Great Lakes Tunnel Project—to be bored deep under the Straits of Mackinac, housing a replacement segment of Line 5—as well as the multiple safety measures we take to ensure safety in the Straits.
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Great Lakes Tunnel Project
A significant private investment in Michigan

An extra layer of safety, bored deep under the Straits of Mackinac.

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Vital energy infrastructure
Line 5 and the Great Lakes Tunnel: Voices of support

Enbridge stands ready to build an underground tunnel to house Line 5, deep under the Straits of Mackinac.

We believe our Great Lakes Tunnel Project is the best way to ensure continued energy supply in Michigan. We’re not alone. Public support for our Line 5 tunnel plan has come from elected officials, policy experts, business owners and leaders, and media columnists—from Michigan and elsewhere.
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Safety in the Straits
A suite of safety precautions
Zero incidents at the Straits in 65+ years. We're keeping it that way with 24/7 vigilance.
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Project information and updates