Michigan Compiled Laws, Chapter 485. Canal, Harbor and River Improvement Companies § 485.12

Sec. 12. If any person shall willfully obstruct, or in anywise injure any such canal, harbor, or improvements, or any dock, wharf, or other fixture connected therewith, or shall violate any rule, or regulation established by said company, such person, or [such] boat or vessel, or other craft, as the said company may elect, shall be liable for all damages done or committed; and said damages, if against the person, may be recovered in an action of trespass, and if proved to have been done willfully, treble damages may be recovered. Any such claim for damages, if the company shall so elect, shall be a lien on any such boat or vessel, or other craft, and such lien may be enforced under the existing provisions of the law therefor.