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 51–75 of 81
| Dam Name | Height (ft) | Year | Hazard | Condition |
|---|---|---|---|---|
| Nashua Milldam Chickasaw County | 20 | 1917 | Significant | Fair |
| Nine Eagles Park Lake Dam Decatur County | 53 | 1930 | Significant | Fair |
| Nodaway Lake Dam Adair County | 35 | 1936 | Significant | Fair |
| Oaknoll Dam Johnson County | 25 | 1994 | High | Fair |
| Old Quarry Lake Dam Cerro Gordo County | 13 | 1977 | Significant | Fair |
| Prescott Flood Prevention Dam Adams County | 27 | 1973 | High | Fair |
| Red Haw Dam Lucas County | 43 | 1934 | High | Fair |
| Roberts Creek Dam Marion County | 60 | 1968 | Significant | Fair |
| Rock Creek Dam Jasper County | 33 | — | Significant | Fair |
| Rock Valley Lake Dam Wayne County | 39 | 2008 | Significant | Fair |
| Rodgers Park Lake Dam Benton County | 30 | 1977 | Significant | Fair |
| Savery/Welliver Dam Monona County | 57 | 1966 | Low | Fair |
| Sawgrass Park Dam Polk County | 27 | 1980 | Low | Fair |
| Scott Basin Dam Guthrie County | 52 | 2013 | Significant | Fair |
| Seymour Reservoir Dam Wayne County | 24 | 1908 | Low | Fair |
| Shryock Dam Polk County | 30 | 1963 | Significant | Fair |
| Slaughter Flood Control Dam Clayton County | 41 | 1938 | High | Fair |
| Smokey Hollow Subwatershed Site 2 Woodbury County | 49 | 1986 | High | Fair |
| Southeast Dam (Dubuque) Dubuque County | 24 | 2000 | Significant | Fair |
| Swiss Lake Estates Dam Fayette County | 44 | 1967 | Low | Fair |
| Turkey Cr Watershed Site 59d-1 Cass County | 32 | 1990 | Significant | Fair |
| Turkey Cr Watershed Site 59d-2 Cass County | 36 | 1980 | Significant | Fair |
| Union Grove Lake Dam Tama County | 29 | 1920 | Significant | Fair |
| Upper Centerville Reservoir Dam Appanoose County | 48 | 1912 | Significant | Fair |
| Vershaw Dam Scott County | 31 | 2005 | Low | Fair |
Data sourced from the National Inventory of Dams (NID). Hazard classification reflects potential consequences of failure, not the likelihood of failure.