I have lakefront property in Michigan on a public lake and am trying to have a boat removed from a dock that is on the boundary of my riparian property line. The boat is perpendicular to the dock which takes up 12 to 15 feet of my 40 foot frontage. The dock is on a private roadend dedicated to the use of subdivision property owners. The person who owns the boat is now claiming adverse possession. Is it possible for him to do this? I need any info or direction on this subject.