Iowa Code § 464A.3
After the approval the commission, if it wishes to proceed further with the project, shall, with the consent of the environmental protection commission, fix a date of hearing not less than two weeks from date of approval of the plan. Notice of the day, hour and place of hearing, relative to proposed work, shall be provided by publication at least once a week for two consecutive weeks in some newspaper of general circulation published in the county where the project is located, or in the counties where the water elevations are affected, under the tentative plan approved. The last publication shall not be less than five days prior to the day set for hearing. Any claim by any persons for damages which may be caused by the project shall be filed with the commission at or prior to the time of the hearing.
Iowa Code § 464A.3
86 Acts, ch 1245, §1876