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 3001–3025 of 3,759
| Dam Name | Height (ft) | Year | Hazard | Condition |
|---|---|---|---|---|
| De Vries Damfountain Hills Plats 3 and 4 Dam Marion County | 25 | 2012 | Low | Not Rated |
| Deutsch Dam Marshall County | 35 | 1960 | Low | Not Rated |
| Dettmer Dam Lee County | 26 | 1974 | Low | Not Rated |
| Detrick Dam Henry County | 30 | 2021 | Low | Not Rated |
| Dessel Dam Cherokee County | 35 | 1963 | Low | Not Rated |
| Desoto Dam Pottawattamie County | 25 | 1960 | Low | Satisfactory |
| Des Moines-Waterworks Dam Polk County | 7 | 1923 | Low | Not Rated |
| Des Moines-Scott Street Milldam Polk County | 7 | 1920 | Low | Not Rated |
| Des Moines County Roadgrade Dam 6-69-4 Des Moines County | 26 | 1985 | Low | Not Rated |
| Des Moines County Roadgrade Dam 18-70-2 Des Moines County | 84 | 1987 | Low | Not Rated |
| Des Moines-Center Street Milldam Polk County | 11 | 1916 | Low | Not Rated |
| Deschamp Dam Tama County | 26 | 1975 | Low | Not Rated |
| Derry Dam Taylor County | 32 | 1983 | Low | Not Rated |
| Derby Dam Davis County | 26 | 2001 | Low | Not Rated |
| Depenning Dam Jasper County | 28 | 1977 | Low | Not Rated |
| Dennis Smith Dam Lucas County | 25 | 2023 | Low | Not Rated |
| Dennis Koenig Dam Winneshiek County | 28 | 2013 | Low | Not Rated |
| Denman Dam Dallas County | 26 | 1977 | Low | Not Rated |
| Denison Country Club #3 Dam Crawford County | 32 | 1991 | Low | Not Rated |
| Delzell Dam Davis County | 21 | 2003 | Low | Not Rated |
| De Louis Dam Appanoose County | 29 | 1992 | Low | Not Rated |
| Delany Dam Monroe County | 28 | 1997 | Low | Not Rated |
| Dejong Dam Marion County | 44 | 1963 | Low | Not Rated |
| Deitchler Dam Mills County | 35 | 2020 | Low | Not Rated |
| Deiber & Shook Dam Crawford County | 31 | 1971 | Low | Not Rated |
Data sourced from the National Inventory of Dams (NID). Hazard classification reflects potential consequences of failure, not the likelihood of failure.