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 776–800 of 3,759
| Dam Name | Height (ft) | Year | Hazard | Condition |
|---|---|---|---|---|
| Dittmer Dam Warren County | 30 | 1977 | Low | Not Rated |
| Dittmer Dam Warren County | 32 | 1970 | Low | Not Rated |
| Dixon Dam Davis County | 20 | 1959 | Low | Poor |
| Dnr Wetlands Dam Boone County | 10 | 1984 | Low | Not Rated |
| Doherty Dam Cherokee County | 37 | 1996 | Low | Not Rated |
| Doherty Dam Cherokee County | 37 | 1998 | Low | Not Rated |
| Donney Dam Webster County | 32 | 1985 | Low | Not Rated |
| Doran Dam Boone County | 63 | 1971 | Low | Not Rated |
| Dorfler Dam Crawford County | 34 | 1971 | Low | Not Rated |
| Dory Dam Union County | 22 | 1985 | Low | Not Rated |
| Doss Dam Decatur County | 26 | 1958 | Low | Not Rated |
| Doty/Truesdell/Johnson Dam Sioux County | 20 | 1975 | Low | Not Rated |
| Double Time Farms Dam Union County | 27 | 1992 | Low | Not Rated |
| Douds Stone Dam Wapello County | 13 | 2003 | Low | Not Rated |
| Downing Dam Union County | 25 | 1994 | Low | Not Rated |
| Downing Dam Warren County | 36 | 2004 | Low | Not Rated |
| Dozark Dam Crawford County | 27 | 1962 | Low | Not Rated |
| Dozark Dam Crawford County | 32 | 1977 | Low | Not Rated |
| Drainage District 15 North Wetland Palo Alto County | 13 | 2013 | Low | Not Rated |
| Drake Dam Adams County | 33 | 2022 | Low | Not Rated |
| Draper Dam Fremont County | 22 | 1963 | Low | Not Rated |
| Draper Dam Fremont County | 46 | 1963 | Low | Not Rated |
| Dredge Dam Ringgold County | 26 | 2013 | Low | Not Rated |
| Dtl Farms LLC Dam Madison County | 33 | 2020 | Low | Not Rated |
| Duane Davis Dam Wayne County | 27 | 1991 | Low | Not Rated |
Data sourced from the National Inventory of Dams (NID). Hazard classification reflects potential consequences of failure, not the likelihood of failure.