| Beaver Creek At New Hartford, IA |
| Beaver Creek Near Grimes, IA |
| Beaver Slough At 3Rd Street At Clinton, IA |
| Big Bear Creek At Ladora, IA |
| Big Creek North Of Mount Pleasant, IA |
| Big Sioux River At Akron, IA |
| Black Hawk Creek At Hudson, IA |
| Bloody Run Creek Near Marquette, IA |
| Bluff Creek At Pilot Mound, IA |
| Boone River Near Goldfield, IA |
| Boone River Near Webster City, IA |
| Boyer River At Logan, IA |
| Brushy Fork Creek Near Templeton, IA |
| Buffalo Creek South Of Prairieburg, IA |
| Burr Oak Creek Near Perkins, IA |
| Cedar Creek Near Bussey, IA |
| Cedar Creek Near Oakland Mills, IA |
| Cedar River At Blairs Ferry Road At Palo, IA |
| Cedar River At Cedar Bluff, IA |
| Cedar River At Cedar Falls, IA |
| Cedar River At Cedar Rapids, IA |
| Cedar River At Charles City, IA |
| Cedar River At Janesville, IA |
| Cedar River At Osage, IA |
| Cedar River At Vinton, IA |
| Cedar River At Waterloo, IA |
| Cedar River At Waverly, IA |
| Cedar River Near Conesville, IA |
| Chariton River Near Chariton, IA |
| Chariton River Near Moulton, IA |
| Chariton River Near Rathbun, IA |
| Clear Creek Near Coralville, IA |
| Clear Creek Near Oxford, IA |
| Crow Creek At Bettendorf, IA |
| Deep River At Deep River, IA |
| Des Moines River At 2Nd Avenue At Des Moines, IA |
| Des Moines River At Emmetsburg, IA |
| Des Moines River At Estherville, IA |
| Des Moines River At Fort Dodge, IA |
| Des Moines River At Humboldt, IA |
| Des Moines River At Keosauqua, IA |
| Des Moines River At Ottumwa, IA |
| Des Moines River Below Raccoon River At Des Moines, IA |
| Des Moines River Near Pella, IA |
| Des Moines River Near Saylorville, IA |
| Des Moines River Near Stratford, IA |
| Des Moines River Near Swan, IA |
| Des Moines River Near Tracy, IA |
| Dry Run Creek Near Decorah, IA |
| Duck Creek At 110Th Avenue At Davenport, IA |
