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 3051–3075 of 4,124
| Dam Name | Height (ft) | Year | Hazard | Condition |
|---|---|---|---|---|
| England Dam Davis County | 23 | 1974 | Low | Not Rated |
| England Dam Wapello County | 31 | 1978 | Low | Not Rated |
| Engbers Dam Mahaska County | 25 | 1976 | Low | Not Rated |
| Emerald Valley Dam Clayton County | 47 | 2008 | Significant | Satisfactory |
| Elwood Dam Howard County | 28 | 1967 | Low | Not Rated |
| Elmore Dam Jefferson County | 27 | 2003 | Low | Not Rated |
| Elliott Dam Story County | 30 | 1968 | Low | Not Rated |
| Elliot Dam Dallas County | 40 | 1965 | Low | Not Rated |
| Ellerbusch Dam Ida County | 22 | 1962 | Low | Not Rated |
| Elks Club Dam Floyd County | 7 | — | Low | Satisfactory |
| Elkhorn No.2 Subwatershed Site 1-3 Plymouth County | 36 | 1984 | Low | Not Rated |
| Elkhorn No.2 Subwatershed 1-5000 Plymouth County | 27 | 1961 | Low | Not Rated |
| Elkhorn No.2 Subwatershed 1-3112 Plymouth County | 36 | 1961 | Low | Not Rated |
| Elk Creek Game Management Dam 2 Worth County | 18 | 1965 | Significant | Fair |
| Elk Creek Game Management Dam 1 Worth County | 17 | 1961 | Significant | Fair |
| Elkader Milldam Clayton County | 16 | 1926 | Low | Not Rated |
| Elias Dam Harrison County | 36 | 1955 | Low | Not Rated |
| Elfrink Wetland Dam #2 Van Buren County | 10 | 1994 | Low | Not Rated |
| Elfrink Wetland Dam #1 Van Buren County | 8 | 1994 | Low | Not Rated |
| Eldred Sherwood Park Lake Dam Hancock County | 33 | 1967 | Low | Not Rated |
| Einwalter Dam Winneshiek County | 9 | 2023 | Low | Not Rated |
| Eichelberger Dam Washington County | 27 | 1996 | Low | Not Rated |
| E&H Farms Dam Jefferson County | 34 | 1988 | Low | Not Rated |
| Edward Schnurr Dam Decatur County | 33 | 2019 | Low | Not Rated |
| Edel Dam Mahaska County | 22 | 1975 | Low | Not Rated |
Data sourced from the National Inventory of Dams (NID). Hazard classification reflects potential consequences of failure, not the likelihood of failure.