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 3026–3050 of 4,124
| Dam Name | Height (ft) | Year | Hazard | Condition |
|---|---|---|---|---|
| Fairfield Waterworks Dam No 2 Jefferson County | 33 | 1900 | Low | Satisfactory |
| Fairfield Water Works Dam No 1 Jefferson County | 40 | 1888 | Significant | Satisfactory |
| Fairbank Dam Buchanan County | 12 | 1880 | Low | Not Rated |
| Facebook North Detention Dam Polk County | 11 | 2020 | Low | Not Rated |
| Faber Trust Dam Wayne County | 27 | 1994 | Low | Not Rated |
| Faber Dam Decatur County | 24 | 2020 | Low | Not Rated |
| Ewing Farms Dam Wayne County | 28 | 2007 | Low | Not Rated |
| Ever-Tru Pond Poweshiek County | 22 | 2016 | Low | Not Rated |
| Everling Dam Clarke County | 30 | 1969 | Low | Not Rated |
| Evans/Heston Dam Lucas County | 33 | 1965 | Low | Not Rated |
| Evans Dam Adams County | 28 | 2021 | Low | Not Rated |
| Evans Dam Lucas County | 18 | 1962 | Low | Not Rated |
| Erickson Dam Clarke County | 26 | 1989 | Low | Not Rated |
| Erickson Dam Webster County | 28 | 1978 | Low | Not Rated |
| Erickson Dam Harrison County | 27 | 2003 | Low | Not Rated |
| Erickson Dam Union County | 29 | 2006 | Low | Not Rated |
| Equity Built Farms Dam Appanoose County | 26 | 1999 | Low | Not Rated |
| Engnell Dam Boone County | 36 | 1970 | Low | Not Rated |
| English Bench Watershed Site 9 Allamakee County | 38 | 1970 | Low | Unsatisfactory |
| English Bench Watershed Site 8 Allamakee County | 34 | 1971 | Low | Not Rated |
| English Bench Watershed Site 7 Allamakee County | 33 | 1970 | Low | Not Rated |
| English Bench Watershed Site 5 Allamakee County | 47 | 1970 | Low | Not Rated |
| English Bench Watershed Site 4 Allamakee County | 34 | 1969 | Low | Not Rated |
| English Bench Watershed Site 2 Allamakee County | 27 | 1969 | Low | Not Rated |
| English Bench Watershed Site 1 Allamakee County | 34 | 1969 | Low | Not Rated |
Data sourced from the National Inventory of Dams (NID). Hazard classification reflects potential consequences of failure, not the likelihood of failure.