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.

Learn the facts ...

... not the fiction

Line 5 in the news

Enbridge project advances to build new segment of Line 5 under Michigan’s Straits of Mackinac

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U.S. Army Corps of Engineers updates schedule

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Great Lakes Tunnel Information Center relaunch includes naming contest for massive project

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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 moves products that heat homes and businesses, fuel vehicles, and power industry throughout the state.

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About 90 tanker trucks per hour would need to travel Michigan roads to move the products that Line 5 transports each day.

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The economies of Michigan, Ohio and elsewhere would face immediate and severe consequences if we did not have Line 5.

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Great Lakes Tunnel Project

Enbridge is partnering with two world-class firms for construction, design and engineering on this $500M+ private investment.

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Vital energy infrastructure

Who uses Line 5? If you live in Michigan, you do.

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About 90 tanker trucks per hour would need to travel Michigan roads to move the products that Line 5 transports each day.

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An abundance of misinformation surrounds Enbridge’s Line 5 pipeline and our Great Lakes Tunnel Project. Learn the truth here.

Find out the facts

Enbridge’s Line 5 supplies more than half of the propane needs for Michigan, the No. 1 state in residential propane use.

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Shutting down Line 5 means shutting down Michigan businesses, higher energy prices and lower tax revenue. Have your say—speak up and make your voice heard.

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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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Keeping a watchful eye with human and automated resources.

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