Mich. Comp. Laws § 254.142

Sec. 2. Before the conveyance authorized by this act is made, the board of county road commissioners of Mackinac county shall file with the department of conservation evidence of its acceptance of the bridge and roads connecting thereto as a part of the public road system and shall submit plans and specifications relative to the structure. The department of conservation may make such recommended changes in the plans and specifications as are necessary to protect the public interest in the public navigable waters.