Iowa Code § 6A.1: Exercise of power by state.

Proceedings may be instituted and maintained by the state of Iowa, or for the use and benefit thereof, for the condemnation of such private property as may be necessary for any public improvement which the general assembly has authorized to be undertaken by the state, and for which an available appropriation has been made. The executive council shall institute and maintain such proceedings in case authority to so do be not otherwise delegated.