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 91
| Dam Name | Height (ft) | Year | Hazard | Condition |
|---|---|---|---|---|
| Creston Flood Prevention Dam Union County | 27 | 1975 | High | Fair |
| Davids Creek Watershed Site 1b-2 Audubon County | 45 | 1977 | High | Fair |
| Deer Creek Dam Plymouth County | 55 | 1995 | High | Satisfactory |
| Easter Lake Stormwater Retention Basin - Site 9 Polk County | 24 | 2005 | High | Satisfactory |
| Fieldstone Addition Dam Black Hawk County | 19 | 1998 | High | Satisfactory |
| Focht & Schindel Dam Plymouth County | 41 | 1970 | High | Fair |
| Fort Des Moines Park Dam Polk County | 49 | 1977 | High | Fair |
| Glen Ellen Subwatershed Site 3-1 Woodbury County | 29 | 1963 | High | Satisfactory |
| Glen Ellen Subwatershed Site 3-2 Woodbury County | 32 | 1963 | High | Fair |
| Glen Oaks Country Club Dam Polk County | 36 | 1950 | High | Satisfactory |
| Grade Lake Dam Clarke County | 44 | 1900 | High | Satisfactory |
| Greenfield Reservoir Dam Adair County | 42 | 1979 | High | Satisfactory |
| Hamburg Watershed Site M-1 Fremont County | 55 | 1961 | High | Satisfactory |
| Held Watershed Site E-3 Plymouth County | 43 | 1978 | High | Poor |
| Held Watershed Site E-4 Plymouth County | 37 | 1978 | High | Poor |
| Heritage Woods Dam Dallas County | 35 | 2008 | High | Satisfactory |
| Indian Creek Watershed Site 2 Pottawattamie County | 65 | 1975 | High | Satisfactory |
| Jefferson Park Watershed Site 1 Wapello County | 36 | 1976 | High | Satisfactory |
| Jefferson Park Watershed Site 10 Wapello County | 30 | 1983 | High | Satisfactory |
| Jefferson Park Watershed Site 3 Wapello County | 42 | 1976 | High | Satisfactory |
| Jefferson Park Watershed Site 4 Wapello County | 36 | 1978 | High | Satisfactory |
| Jefferson Park Watershed Site 5 Wapello County | 43 | 1985 | High | Satisfactory |
| Lake Cimarron Poweshiek County | 27 | 2012 | High | Satisfactory |
| Lake of The Hills Dam Scott County | 48 | 1972 | High | Satisfactory |
| Lake Ponderosa Dam Poweshiek County | 50 | 1969 | High | Satisfactory |
Data sourced from the National Inventory of Dams (NID). Hazard classification reflects potential consequences of failure, not the likelihood of failure.