Michigan Compiled Laws, Chapter 324. Natural Resources and Environmental Protection § 324.80163

Sec. 80163.(1) If an anchored raft or other item or material, whether floating free or attached to the bottomland or a shoreline, presents a hazard to navigation, the department or a peace officer with jurisdiction over the body of water where the anchored raft or other item or material is located may relocate or remove it or may order its relocation or removal.

(2) The person who owns or who caused a navigational hazard that is relocated or removed under subsection (1) is liable to pay the actual and reasonable costs of relocation or removal. The department or the law enforcement agency with jurisdiction over the body of water where the navigational hazard was located may send written notice of the relocation or removal under subsection (1) and the associated costs to the person determined to own or to have caused the navigational hazard. If the owner or person who caused the navigational hazard fails to pay the costs within 30 days of the date the written notice is mailed, the costs may become a lien against the person's property.