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 651–675 of 3,759
| Dam Name | Height (ft) | Year | Hazard | Condition |
|---|---|---|---|---|
| Dane Ridge Watershed Site C-4 Crawford County | 44 | 1971 | Low | Not Rated |
| Dane Ridge Watershed Site C-5 Crawford County | 46 | 1977 | Low | Not Rated |
| Dane Ridge Watershed Site C-6 Crawford County | 43 | 1977 | Low | Not Rated |
| Dane Ridge Watershed Site C-7 Crawford County | 38 | 1977 | Low | Not Rated |
| Dane Ridge Watershed Site D-10 Crawford County | 49 | 1978 | Low | Not Rated |
| Dane Ridge Watershed Site D-11 Crawford County | 35 | 1978 | Low | Not Rated |
| Dane Ridge Watershed Site D-1-3 Crawford County | 50 | 1971 | Low | Not Rated |
| Dane Ridge Watershed Site D-13 Crawford County | 25 | 1978 | Low | Not Rated |
| Dane Ridge Watershed Site D-1-4 Crawford County | 49 | 1977 | Low | Not Rated |
| Dane Ridge Watershed Site D-14 Crawford County | 39 | 1980 | Low | Not Rated |
| Dane Ridge Watershed Site D-1-5 Crawford County | 39 | 1978 | Low | Not Rated |
| Dane Ridge Watershed Site D-1-6 Crawford County | 39 | 1978 | Low | Not Rated |
| Dane Ridge Watershed Site D-1-7 Crawford County | 41 | 1978 | Low | Not Rated |
| Dane Ridge Watershed Site D-2-1 Crawford County | 39 | 1977 | Low | Not Rated |
| Dane Ridge Watershed Site D-2-2 Crawford County | 33 | 1971 | Low | Not Rated |
| Dane Ridge Watershed Site D-2-5 Crawford County | 37 | 1978 | Low | Not Rated |
| Dane Ridge Watershed Site D-2-6 Crawford County | 33 | 1978 | Low | Not Rated |
| Dane Ridge Watershed Site D-3-1 Crawford County | 44 | 1971 | Low | Not Rated |
| Dane Ridge Watershed Site D-6 Crawford County | 31 | 1978 | Low | Not Rated |
| Dane Ridge Watershed Site D-9 Crawford County | 35 | 1978 | Low | Not Rated |
| Danilson Dam Boone County | 35 | 1973 | Low | Not Rated |
| Darbyshire Dam Henry County | 31 | 2009 | Low | Not Rated |
| Dashner Dam Mills County | 37 | 1959 | Low | Not Rated |
| David Downey Dam Union County | 34 | 2013 | Low | Not Rated |
| David Loutzenhiser Dam Ringgold County | 32 | 2021 | Low | Not Rated |
Data sourced from the National Inventory of Dams (NID). Hazard classification reflects potential consequences of failure, not the likelihood of failure.