Office of Planning, Environment, & Realty (HEP)
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Counties with more than 5% loss: Adair, Adams, Appanoose, Audbon, Butler, Calhoun, Carroll, Cass, Cerro Gordo, Cherokee, Chickasaw, Clay, Clayton, Clinton, Crawford, Decatur, Des Moines, Emmet, Fayette, Floyd, Franklin, Fremont, Greene, Grundy, Guthrie, Hamilton, Hancock, Hardin, Howard, Humboldt, Ida, Keokuk, Kossuth, Lee, Lucas, Lyon, Mitchell, Monona, Monroe, Montgomery, O'Brien, Osceola, Page Palo Alto, Pocahontas, Ringgold, Sac, Shelby, Tama, Taylor Union, Van Buren, Wapello, Wayne, Webster, Winnebago, Worth, and Wright.
Counties with less than 5% loss: Allamakee, Black Hawk, Boone, Buchanan, Buena Vista, Delaware, Dubuque, Harrison, Jackson, Marshall, and Winneshiek.
State maps are not scaled. FHWA does not recommend adoption of these maps as a state policy without appropriate consultation and consideration of state issues.