Mich. Comp. Laws § 324.41508
All of the swamp or submerged lands lying along the borders of Lakes Erie, Huron, Michigan, Superior, and St. Clair, except such parts of the "St. Clair Flats," so-called, as have been, prior to January 1, 1899, actually occupied, built up, cultivated, or improved to the extent of at least $25.00, within the boundaries of the state, and within the limits described in this section, and also all swamp or submerged lands adjoining these lakes, or in the bayous adjoining or emptying into these lakes, and also all swamp or submerged lands contiguous to and lying along the shores of the Kalamazoo river, Grand river, and Muskegon river, which now belong to the state, or to which the state later acquires title, are set apart and dedicated for a public shooting and hunting ground, for the benefit and enjoyment of the people of the state. This park shall extend to the state line into the respective lakes from the shoreline of the lakes, and the outer boundary of the park shall be the center line of the lakes or the boundary of the state. The park described in this subpart shall include all swamp or submerged lands lying between the shoreline and the outer boundary. The premises described in this subpart do not include any islands in any of the lakes to which the state does not have title, unless the state first acquires title. The park shall also include the swamp or submerged lands owned or acquired by the state that border upon the lakes or in or upon the bayous emptying into the lakes.
MCL 324.41508