Iowa Code § 306.11: Hearing — place — date.

In proceeding to the vacation and closing of a road, part thereof, or railroad crossing, the agency in control of the road, or road system, shall fix a date for a hearing on the vacation and closing in the county where the road, or part thereof, or crossing, is located, and if located in more than one county, then in a county in which any part of the road or crossing is located. If the road to be vacated or changed is a secondary road located in more than one county, the boards of supervisors of the counties, acting jointly, shall fix a date for a hearing on the vacation or change in either or any of the counties where the road, or part thereof, is located. If the proposed vacation is of part of a road right-of-way held by easement and will not change the existing traveled portion of the road or deny access to the road by adjoining landowners, a hearing is not required.