Mich. Comp. Laws § 485.101: Corporations to improve on rivers; formation; tolls.

Sec. 1.

That any number of persons may associate for the purpose of improving the navigation of any river in this state, by deepening the channel thereof and the construction of dams therein, and canals to connect therewith, upon such terms and conditions and subject to such liabilities as are prescribed in this act, and to take and receive such amounts of toll for the passage of vessels, boats, rafts, timber, logs and lumber, through such river, when the navigation shall be thus improved, as the board of control of the St. Mary's Falls ship canal may prescribe, as herein provided.