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 2976–3000 of 3,759
| Dam Name | Height (ft) | Year | Hazard | Condition |
|---|---|---|---|---|
| Dorfler Dam Crawford County | 34 | 1971 | Low | Not Rated |
| Doran Dam Boone County | 63 | 1971 | Low | Not Rated |
| Donney Dam Webster County | 32 | 1985 | Low | Not Rated |
| Doherty Dam Cherokee County | 37 | 1998 | Low | Not Rated |
| Doherty Dam Cherokee County | 37 | 1996 | Low | Not Rated |
| Dnr Wetlands Dam Boone County | 10 | 1984 | Low | Not Rated |
| Dixon Dam Davis County | 20 | 1959 | Low | Poor |
| Dittmer Dam Warren County | 30 | 1977 | Low | Not Rated |
| Dittmer Dam Warren County | 32 | 1970 | Low | Not Rated |
| Dingeman Dam Marion County | 27 | 1970 | Low | Not Rated |
| Dimmitt Dam Wapello County | 20 | 1965 | Low | Not Rated |
| Dimick Dam Jefferson County | 29 | 1985 | Low | Not Rated |
| Diers Dam Jefferson County | 21 | 1969 | Low | Not Rated |
| Diericky Pond Dam Muscatine County | 30 | 1987 | Low | Not Rated |
| Diehl Dam Ringgold County | 31 | 1991 | Low | Not Rated |
| Diede Dam Plymouth County | 27 | 1999 | Low | Not Rated |
| Diede Dam Woodbury County | 27 | 1996 | Low | Not Rated |
| Dickman Subwatershed Site M-4 Woodbury County | 34 | 1973 | Low | Not Rated |
| Dickman Subwatershed Site M-2 Woodbury County | 42 | 1973 | Low | Not Rated |
| Dickman Subwatershed Site 3-1 Woodbury County | 38 | 1973 | Low | Not Rated |
| Dickinson Dam Washington County | 29 | 1972 | Low | Not Rated |
| Diamond Lake Watershed Site B-9 Poweshiek County | 28 | 1972 | Low | Not Rated |
| Diamond Lake Watershed Site A-2 Poweshiek County | 18 | 1966 | Low | Not Rated |
| Diamond Lake Dam Dickinson County | 8 | 1957 | Low | Not Rated |
| Diamond Lake Campground Dam Poweshiek County | 26 | 2008 | Low | Not Rated |
Data sourced from the National Inventory of Dams (NID). Hazard classification reflects potential consequences of failure, not the likelihood of failure.