The Mackinac Bridge is at a lower risk of collapse from a vessel collision than the national threshold, according to a report released on Wednesday.
The Mackinac Bridge Authority said it contracted with consultant engineering firm Parsons to evaluate the bridge against the American Association of State Highway and Transportation Officials (AASHTO) design guidelines.
It comes after the March 2024 collapse of the Francis Scott Key Bridge in Baltimore after it was struck by a container ship. The National Transportation Safety Board called on the owners of 68 bridges — including the Mackinac Bridge — to evaluate the structures for risk of collapse…