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 2951–2975 of 3,759
| Dam Name | Height (ft) | Year | Hazard | Condition |
|---|---|---|---|---|
| Dunham Dam Johnson County | 38 | 1978 | Low | Not Rated |
| Dukes Dam Adair County | 24 | 2002 | Low | Not Rated |
| Dugout Creek Wetland Dam Dickinson County | 12 | 1993 | Low | Not Rated |
| Duffield Dam Davis County | 30 | 1982 | Low | Not Rated |
| Duey Dam Monroe County | 26 | 1993 | Low | Not Rated |
| Duer Dam Monroe County | 30 | 2000 | Low | Not Rated |
| Dudycha Wrp #2 Buena Vista County | 12 | 2002 | Low | Not Rated |
| Dudycha Wrp #1 Buena Vista County | 7 | 2002 | Low | Not Rated |
| Dudley Dam Wayne County | 28 | 1989 | Low | Not Rated |
| Duane Davis Dam Wayne County | 27 | 1991 | Low | Not Rated |
| Dtl Farms LLC Dam Madison County | 33 | 2020 | Low | Not Rated |
| Dredge Dam Ringgold County | 26 | 2013 | Low | Not Rated |
| Draper Dam Fremont County | 46 | 1963 | Low | Not Rated |
| Draper Dam Fremont County | 22 | 1963 | Low | Not Rated |
| Drake Dam Adams County | 33 | 2022 | Low | Not Rated |
| Drainage District 15 North Wetland Palo Alto County | 13 | 2013 | Low | Not Rated |
| Dozark Dam Crawford County | 27 | 1962 | Low | Not Rated |
| Dozark Dam Crawford County | 32 | 1977 | Low | Not Rated |
| Downing Dam Union County | 25 | 1994 | Low | Not Rated |
| Downing Dam Warren County | 36 | 2004 | Low | Not Rated |
| Douds Stone Dam Wapello County | 13 | 2003 | Low | Not Rated |
| Double Time Farms Dam Union County | 27 | 1992 | Low | Not Rated |
| Doty/Truesdell/Johnson Dam Sioux County | 20 | 1975 | Low | Not Rated |
| Doss Dam Decatur County | 26 | 1958 | Low | Not Rated |
| Dory Dam Union County | 22 | 1985 | Low | Not Rated |
Data sourced from the National Inventory of Dams (NID). Hazard classification reflects potential consequences of failure, not the likelihood of failure.