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 2176–2200 of 3,759
| Dam Name | Height (ft) | Year | Hazard | Condition |
|---|---|---|---|---|
| Moorewood Farms Dam Hardin County | 34 | 1975 | Low | Not Rated |
| Moorhead Dam Monona County | 36 | 1965 | Low | Not Rated |
| Moorhead Pioneer Park Dam Ida County | 36 | 1966 | Low | Satisfactory |
| Moorhead Pioneer Park Dam Allamakee County | 29 | 1965 | Low | Satisfactory |
| Moran Dam Pottawattamie County | 22 | 1970 | Low | Not Rated |
| Morf Dam Linn County | 33 | 2013 | Low | Not Rated |
| Morgan Dam Washington County | 24 | 2002 | Low | Not Rated |
| Mormon Trail Lake Dam Adair County | 46 | 1965 | Low | Satisfactory |
| Morr Dam Lucas County | 18 | 1958 | Low | Not Rated |
| Morris Dam Lucas County | 26 | 1991 | Low | Not Rated |
| Morse Lake Wright County | 10 | — | Low | Not Rated |
| Morse Lake Downstream Wetland Wright County | 8 | — | Low | Not Rated |
| Mortenson Subwatershed Sta99+92 Main Cherokee County | 41 | 1950 | Low | Not Rated |
| Mosier/Bandy Dam Woodbury County | 32 | 1962 | Low | Not Rated |
| Mosquito Creek Watershed Site 11-2-2 Harrison County | 38 | 1979 | Low | Not Rated |
| Mosquito Creek Watershed Site 13-1 Harrison County | 36 | 1968 | Low | Not Rated |
| Mosquito Creek Watershed Site 6-1 Harrison County | 46 | 1979 | Low | Not Rated |
| Mosquito Creek Watershed Site 6-2 Harrison County | 40 | 1979 | Low | Not Rated |
| Mosquito Creek Watershed Site 6-5 Harrison County | 47 | 1979 | Low | Not Rated |
| Mosquito of Harrison B Harrison County | 31 | 1987 | Low | Not Rated |
| Mosquito of Harrison Watershed Site 5-1 Harrison County | 52 | 1985 | Low | Not Rated |
| Mosquito of Harrison Watershed Site 5-2 Harrison County | 43 | 1988 | Low | Not Rated |
| Mosquito of Harrison Watershed Site 5-3 Harrison County | 40 | 1988 | Low | Not Rated |
| Mosquito of Harrison Watershed Site 5-4 Harrison County | 45 | 1988 | Low | Not Rated |
| Mosquito of Harrison Watershed Site 7-1 Harrison County | 50 | 1993 | Low | Not Rated |
Data sourced from the National Inventory of Dams (NID). Hazard classification reflects potential consequences of failure, not the likelihood of failure.