Mackinac Bridge Authority, Enbridge Meet

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A meeting with the Mackinac Bridge Authority this week reviewed some technicalities and revisions requested by Enbridge for project specifications for the tunnel under the Straits of Mackinac. They include the technical requirements of the tunnel and construction needs that focus on the tunnel infrastructure. Consultant Dr. Mike Mooney addressed the authority.

“The three requests, the first one is to add type 1L cement into the specifications of that recommendation,” Mooney said. The second request was to allow truck-mixed concrete for use in concrete structures.”

The third request from Enbridge is to update to the crude blends for gasket exposure testing. Mooney says the testing requirements for chemical resistance remain the same and these revisions more accurately reflect the content of fluids being carried through the pipeline.