Reports & Info

Michigan's Governor Snyder entered into agreements with Enbridge and passed a law allowing the construction of a utility tunnel through the Straits of Mackinac. 

The law and agreements are included here.

Act No. 359 (HTML version) - 12/12/2018

Law Authorizing Creation of Mackinac Straits Corridor Authority and Tunnel Oversight

The Tunnel Agreement- 12/19/2018

Third Agreement - 12/19/2018

Agreement to fulfill the parties' obligations under the Second Agreement

• Continued Operation of Dual Pipelines Pending Completion of Tunnel and Activation of Line 5 Replacement Segment
• Compliance with 1953 Easement
  • Financial Assurance
  • Pipeline Coatings
  • Maximum Span of Unsupported Pipe
• Construction and Operation of Straits Line 5 Replacement Segment
• Permanent Deactivation of Dual Pipelines
• Delay Events
• Dispute Resolution
• Termination

Second Agreement - 10/3/2018

Agreement to pursue a further agreement to address Line 5’s crossing of the Straits of Mackinac

• Continued Coordination Between the State and Enbridge
• Replacement of Line 5 St. Clair River Crossing
• Discontinuation of Line 5 Operations in the Straits During Sustained Adverse Weather Conditions
• Underwater Technologies to Enhance Leak Detection and Technologies to Assess Coating Condition of the Dual Pipelines
• Implementation of Measures to Mitigate Potential Vessel Anchor Strike
• Replacement of Dual Pipelines in a Straits Tunnel
• Further Agreements for a Straits Tunnel
• Permanent Deactivation of the Dual Pipelines
• Line 5 Water Crossings Other Than the Straits
• Financial Assurance
• Continuation of Additional Measures to Enhance the Safety of Line 5 in Michigan

First Agreement - 11/27/2017

Agreement to improve coordination between Enbridge and the State of Michigan for operation and maintenance of Line 5 pipeline

• Increases coordination between Enbridge and the State of Michigan
• Replacement of Line 5 St. Clair River Crossing
• Discontinuation of Line 5 Operations in the Straits during sustained adverse weather conditions
• Evaluation of underwater technologies to enhance leak detection
• Evaluation and implementation of measures to mitigate potential vessel anchor strike
• Evaluation of alternatives to replace dual pipelines
• Evaluation of Line 5 water crossings other than the Straits
• Potential further agreement concerning pipelines across the Straits