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 |
|---|---|---|---|---|
| Iowa Falls Milldam Hardin County | 26 | 1925 | Significant | Fair |
| Hon Dam Muscatine County | 19 | 1991 | Significant | Fair |
| Homepond Dam Decatur County | 30 | 1920 | Significant | Fair |
| Harrison County Roadgrade Dam 18-79-43 Harrison County | 66 | 1959 | Significant | Fair |
| Green Valley Lake Dam Union County | 41 | 1953 | Significant | Fair |
| Glen Ellen Subwatershed Site 3-2 Woodbury County | 32 | 1963 | High | Fair |
| Glen Ellen Subwatershed Site 2-2 Woodbury County | 25 | 1963 | Significant | Fair |
| Fort Des Moines Park Dam Polk County | 49 | 1977 | High | Fair |
| Focht & Schindel Dam Plymouth County | 41 | 1970 | High | Fair |
| Elk Creek Game Management Dam 2 Worth County | 18 | 1965 | Significant | Fair |
| Elk Creek Game Management Dam 1 Worth County | 17 | 1961 | Significant | Fair |
| Dog Creek Dam O'Brien County | 43 | 1967 | Significant | Fair |
| Diamond Lake Watershed Site B-8 Poweshiek County | 27 | 1971 | Significant | Fair |
| Davids Creek Watershed Site 1b-2 Audubon County | 45 | 1977 | High | Fair |
| Dakins Lake Dam Story County | 40 | 2014 | Significant | Fair |
| Crystal Lake Dam Lucas County | 27 | 1915 | Significant | Fair |
| Creston Flood Prevention Dam Union County | 27 | 1975 | High | Fair |
| Country Club Business Park Dam Dallas County | 18 | 1989 | Significant | Fair |
| Clinton Flood Control - May Pond Dam Clinton County | 21 | 1988 | High | Fair |
| Carter Road Stormwater Detention Dam Dubuque County | 41 | 2004 | High | Fair |
| Bobwhite Lake Dam Wayne County | 27 | 1900 | Significant | Fair |
| Big Whiskey 1 Subwatershed Site 3-1 Woodbury County | 38 | 1968 | Significant | Fair |
| Bedford Water Supply Dam Taylor County | 44 | 1969 | Significant | Fair |
| Badger Lake Dam Webster County | 35 | 1963 | Significant | Fair |
| Badger Creek Watershed Site 14-1 Madison County | 36 | 1984 | Significant | Fair |
Data sourced from the National Inventory of Dams (NID). Hazard classification reflects potential consequences of failure, not the likelihood of failure.