Iowa Code § 468.232: Compensation.

The members of the board of county drainage administrators shall each receive compensation at an hourly rate established by the county board of supervisors for time actually devoted to the duties of their office, and reimbursement at the rate established by section 70A.9 for travel to and from meetings of, or other places of performing the duties of, the board, and other actual and necessary expenses incurred in the performance of their duties.