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 2476–2500 of 4,124
| Dam Name | Height (ft) | Year | Hazard | Condition |
|---|---|---|---|---|
| Iowa Noname62 Ringgold County | 26 | 1976 | Low | Not Rated |
| Iowa Noname60 Woodbury County | 29 | 1964 | Significant | Not Rated |
| Iowa Noname6 Boone County | 40 | 1963 | Low | Not Rated |
| Iowa Noname59 Wayne County | 29 | 1967 | Low | Not Rated |
| Iowa Noname58 Wayne County | 22 | 1972 | Low | Not Rated |
| Iowa Noname57 Washington County | 47 | 1971 | Low | Not Rated |
| Iowa Noname53 Union County | 26 | 1972 | Low | Not Rated |
| Iowa Noname52 Taylor County | 27 | 1968 | Low | Not Rated |
| Iowa Noname51 Taylor County | 35 | 1972 | Low | Not Rated |
| Iowa Noname50 Story County | 24 | 1971 | Low | Not Rated |
| Iowa Noname49 Sioux County | 61 | 1966 | Low | Not Rated |
| Iowa Noname48 Shelby County | 40 | 1960 | Low | Not Rated |
| Iowa Noname47 Shelby County | 23 | 1965 | Low | Not Rated |
| Iowa Noname45 Scott County | 21 | 1967 | Low | Not Rated |
| Iowa Noname44 Scott County | 29 | 1966 | Low | Not Rated |
| Iowa Noname43 Pottawattamie County | 40 | 1959 | Low | Not Rated |
| Iowa Noname41 Pottawattamie County | 33 | 1970 | Low | Not Rated |
| Iowa Noname40 Pottawattamie County | 42 | 1972 | Low | Not Rated |
| Iowa Noname39 Pottawattamie County | 30 | 1971 | Low | Not Rated |
| Iowa Noname36 Plymouth County | 50 | 1965 | Low | Not Rated |
| Iowa Noname35 Plymouth County | 35 | 1967 | Significant | Not Rated |
| Iowa Noname34 O'Brien County | 46 | 1973 | Low | Not Rated |
| Iowa Noname33 Monona County | 53 | 1966 | Low | Not Rated |
| Iowa Noname32 Monona County | 37 | 1967 | Low | Not Rated |
| Iowa Noname30 Marion County | 27 | 1972 | Low | Not Rated |
Data sourced from the National Inventory of Dams (NID). Hazard classification reflects potential consequences of failure, not the likelihood of failure.