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 3901–3925 of 4,124
| Dam Name | Height (ft) | Year | Hazard | Condition |
|---|---|---|---|---|
| Bartlett Hills Lake Dam Mills County | 30 | 1973 | Low | Not Rated |
| Bartlett Dam Crawford County | 31 | 1964 | Low | Not Rated |
| Barr Dam Montgomery County | 40 | 1995 | Low | Not Rated |
| Barnett Dam Guthrie County | 26 | 1965 | Low | Not Rated |
| Barclay Dam Poweshiek County | 25 | 1966 | Low | Not Rated |
| Barcal Dam Plymouth County | 49 | 1959 | Low | Not Rated |
| Barber Hollow Subwtrshed Site 5-H-3865 Monona County | 30 | 1967 | Low | Not Rated |
| Barber Hollow Subwatershed Site 5-1 Monona County | 51 | 1966 | Low | Not Rated |
| Banks Dam Plymouth County | 42 | 1966 | Low | Not Rated |
| Banks Dam Plymouth County | 35 | 1967 | Low | Not Rated |
| Bangston Dam Montgomery County | 32 | 2006 | Low | Not Rated |
| Bamboo Ridge Lake Black Hawk County | 20 | 2012 | High | Satisfactory |
| Balzer Dam Muscatine County | 29 | 1964 | Low | Not Rated |
| Ball Dam Davis County | 26 | 1978 | Low | Not Rated |
| Ball Dam Louisa County | 29 | 1985 | Low | Not Rated |
| Ballard Dam Warren County | 37 | 1979 | Low | Not Rated |
| Ballard Country Club Dam Story County | 33 | 1974 | Low | Satisfactory |
| Ballanger Dam Appanoose County | 28 | 2004 | Low | Not Rated |
| Baldwin Dam Plymouth County | 28 | 1998 | Low | Not Rated |
| Baker Subwatershed Site 5-3 Monona County | 40 | 1959 | Low | Not Rated |
| Baker Subwatershed Site 2-4 Monona County | 29 | 1959 | Low | Not Rated |
| Baker Subwatershed Site 1-3 Monona County | 38 | 1959 | Low | Not Rated |
| Baker Estate Dam Davis County | 26 | 1960 | Low | Not Rated |
| Baker Dam Poweshiek County | 31 | 1977 | Low | Not Rated |
| Baker Dam Warren County | 26 | 1997 | Low | Not Rated |
Data sourced from the National Inventory of Dams (NID). Hazard classification reflects potential consequences of failure, not the likelihood of failure.