Michigan Compiled Laws, Chapter 426. Forest Products § 426.174

Sec. 4. Whoever shall convert to his own use, without the consent of the owner thereof, any logs, timber, boards, or planks floating in any of the waters of this state, or lying on the banks or shores of such waters, or on any island where the same may have drifted, except as in this chapter provided for, shall be liable to the owner thereof in treble the amount of damages.