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Line 5 in Michigan
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MDOT Question on Geotechnical Investigation, January 2021
MDOT Question on Collapses in Terms of Loss of Face Control, January 2021
MDOT Question on Risk Mitigation, January 2021
MDOT Question on Gas Encounters, January 2021
MDOT Question on Vibrations, January 2021
MDOT Question on Slurry Containment, January 2021
EGLE Permit Decision Documents
Proposed Line 5/Great Lakes Tunnel Project FAQ's
EGLE's NPDES Permitting Presentation
Tunnel Agreement (MSCA/Enbridge Energy)
Line 5 Replacement and Tunnel Project: Geotechnical Data Report
Enbridge provided the Geotechnical Data Report regarding the Straits of Mackinac to the Mackinac Straits Corridor Authority through MDOT.
Letter Agreement Regarding Technical Specifications (Enbridge Energy/MSCA)
Assignment of Easement Rights for Utility Tunnel (MSCA/Enbridge)
Easement to Construct and Maintain Underground Utility Tunnel at the Straits of Mackinac (MDNR)
Second Agreement between the State of Michigan, MDEQ, and MDNR and Enbridge Energy
Third Agreement Between the State of Michigan, MDEQ, and MDNR and Enbridge Energy
The Great Lakes Tunnel Project - Geotechnical Data Report - Summary (Enbridge)
Agreement Between the State of Michigan and Enbridge Energy, Limited Partnership and Enbridge Energy Company, Inc.
Straits of Mackinac Pipe Line Easement Conservation Commission of the State of Michigan to Lakehead Pipe Line Company, Inc.
Alternatives for replacing Enbridge's dual Line 5 pipelines crossing the Straits of Mackinac (Report to the State of Michigan from Enbridge)
More information about the tunnel project including an animated video describing the tunneling process in more detail is available on Enbridge's website.
Copyright 2021 State of Michigan