Iowa Dams
4,124 dams tracked by the National Inventory of Dams
Total Dams
4,124
High Hazard
91
2.2%
Poor / Unsatisfactory
25
Average Age
46 yrs
Hazard Classification
High91 (2.2%)
Significant274 (6.6%)
Low3,759 (91.1%)
Condition Assessment
Satisfactory259 (6.3%)
Fair81 (2.0%)
Poor / Unsatisfactory25 (0.6%)
Not Rated3,759 (91.1%)
Federal
25
State
141
Local
1,938
Private
2,014
Tallest Dams
- Coralville Dam132 ft
- Saylorville Dam125 ft
- County Basin Dam104 ft
- Rathbun Dam100 ft
- Brushy Creek Dam100 ft
High Hazard Dams
- Coralville DamHigh
- Saylorville DamHigh
- Rathbun DamHigh
- Brushy Creek DamHigh
- Big Creek Barrier DamHigh
Poor Condition Dams
All Dams in Iowa
Showing 26–50 of 81
| Dam Name | Height (ft) | Year | Hazard | Condition |
|---|---|---|---|---|
| Prescott Flood Prevention Dam Adams County | 27 | 1973 | High | Fair |
| Old Quarry Lake Dam Cerro Gordo County | 13 | 1977 | Significant | Fair |
| Oaknoll Dam Johnson County | 25 | 1994 | High | Fair |
| Nodaway Lake Dam Adair County | 35 | 1936 | Significant | Fair |
| Nine Eagles Park Lake Dam Decatur County | 53 | 1930 | Significant | Fair |
| Nashua Milldam Chickasaw County | 20 | 1917 | Significant | Fair |
| Napa Valley Dam Dallas County | 32 | 1988 | Significant | Fair |
| Muscatine County Roadgrade Dam 14-77-1e Muscatine County | 38 | 1971 | Significant | Fair |
| Mount Ayr Reservoir Dam Ringgold County | 40 | 1930 | Significant | Fair |
| Mill Picayune Watershed Site M-8 Shelby County | 46 | 1963 | Significant | Fair |
| Meyer Dam Crawford County | 45 | 1965 | High | Fair |
| Meadow Lake Dam Adair County | 39 | 1964 | Significant | Fair |
| Mc Dowell Lake Dam 2 Lee County | 29 | 1967 | Significant | Fair |
| Mariposa Lake Dam Jasper County | 25 | 1952 | Low | Fair |
| Lower Centerville Reservoir Dam Appanoose County | 39 | 1912 | Significant | Fair |
| Loch Burns Dam Wapello County | 30 | 1963 | Low | Fair |
| Little River Watershed Site 65 Decatur County | 45 | 1987 | Significant | Fair |
| Lincoln Ridge Estates Dam Greene County | 33 | 2007 | Significant | Fair |
| Leisure Lake Dam Jackson County | 58 | 1958 | High | Fair |
| Lake Morris Dam Lucas County | 39 | 1993 | Significant | Fair |
| Lake Meyer Dam Winneshiek County | 46 | 1966 | Significant | Fair |
| Lake Iowa Dam Iowa County | 40 | 1962 | Significant | Fair |
| Lake Huntington Scott County | 35 | 1971 | Significant | Fair |
| Lake Ellis Dam Lucas County | 38 | 1993 | Significant | Fair |
| Lake Canyada Dam Scott County | 17 | 1958 | Low | Fair |
Data sourced from the National Inventory of Dams (NID). Hazard classification reflects potential consequences of failure, not the likelihood of failure.