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
Condition Assessment
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 2526–2550 of 4,124
| Dam Name | Height (ft) | Year | Hazard | Condition |
|---|---|---|---|---|
| Indian Cr-Van Buren Watershed Site 20 Van Buren County | 31 | 1989 | Low | Not Rated |
| Indian Cr-Van Buren Watershed Site 15 Van Buren County | 37 | 1989 | Low | Poor |
| Indian Cr-Van Buren Watershed Site 13 Van Buren County | 36 | 1988 | Low | Not Rated |
| Indian Creek Watershed Site 6 Pottawattamie County | 32 | 1967 | Low | Not Rated |
| Indian Creek Watershed Site 5 Pottawattamie County | 36 | 1965 | Low | Not Rated |
| Indian Creek Watershed Site 4 Pottawattamie County | 52 | 1965 | Low | Not Rated |
| Indian Creek Watershed Site 39 Pottawattamie County | 53 | 1975 | Low | Not Rated |
| Indian Creek Watershed Site 26 Pottawattamie County | 54 | 1975 | Low | Not Rated |
| Indian Creek Watershed Site 25 Pottawattamie County | 37 | 1976 | Low | Not Rated |
| Indian Creek Watershed Site 2 Pottawattamie County | 65 | 1975 | High | Satisfactory |
| Indian Creek Watershed Site 13 Pottawattamie County | 36 | 1967 | Low | Not Rated |
| Indian Creek Watershed Site 12 Pottawattamie County | 63 | 1975 | Low | Not Rated |
| Indian Creek-Van Buren Watershed Site 27 Van Buren County | 36 | 1990 | Significant | Satisfactory |
| Indian Creek Country Club Story County | 32 | 1981 | Low | Not Rated |
| Independence Milldam Buchanan County | 11 | 1922 | Low | Not Rated |
| Illum Dam Marshall County | 27 | 2002 | Low | Not Rated |
| Il & Ic Dam Jefferson County | 8 | 1992 | Low | Not Rated |
| Ilex Dam Polk County | 10 | 1980 | Significant | Not Rated |
| Idot Wetland Dam Louisa County | 8 | 1994 | Low | Not Rated |
| Idot Roadgrade Dam 7-88-47 Woodbury County | 25 | 1979 | Low | Not Rated |
| Idot Roadgrade Dam 32-88-25 Hamilton County | 28 | 1977 | Low | Not Rated |
| Ida County Roadgrade Dam 04-85-41 Crawford County | 28 | 1961 | Low | Not Rated |
| Ibeling Dam Franklin County | 28 | 1985 | Low | Not Rated |
| Hynick Dam 2 Mahaska County | 28 | 1962 | Low | Not Rated |
| Hynick Dam Mahaska County | 29 | 1963 | Low | Not Rated |
Data sourced from the National Inventory of Dams (NID). Hazard classification reflects potential consequences of failure, not the likelihood of failure.