Iowa Code § 468.33: Supervising engineer — bond.

Upon the payment or securing of damages, the board shall appoint a competent engineer to have charge of the work of construction thereof, who shall be required before entering upon the work to give a bond to the county for the use and benefit of the levee or drainage district, to be approved by the auditor in such sum as the board may fix, conditioned for the faithful discharge of the engineer’s duties.