Mich. Comp. Laws § 247.187

Sec. 17. Any person or persons, firm, corporation or municipality violating any of the provisions of this chapter, shall, upon written demand of the commissioner or commissioners having jurisdiction over the road, remove such encroachments, pipe lines, wires, cables, poles, conduits, sewers and like structures. If removal be not made within 30 days thereafter, then the said commissioner or commissioners shall have the right to remove the same and the person, persons, firm or corporation or municipality so violating, shall be liable for the amount of expense incurred in making such removal, to be collected in an action of assumpsit, or assessed upon the property of such person, persons, firm or corporation and collected in the same manner as other taxes are assessed and collected.