Minn. Stat. § 163.111: DRAINAGE FACILITY, VACATION.

On consideration of a petition for vacation of a county highway, the county board shall determine whether the lateral ditches of said highway are essential for surface drainage of adjacent lands, or for drainage of public highways, in the area. If the board finds that preservation of such drainage facilities is for the general health and welfare of the public, then the board may cause the highway to be vacated with a provision that the county shall retain the right of access for the purpose of maintaining such drainage facilities. An owner of land adjacent to the vacated portion of the highway shall not interfere with the functioning of such drainage facilities.