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 176–200 of 259
| Dam Name | Height (ft) | Year | Hazard | Condition |
|---|---|---|---|---|
| Gegner Dam Madison County | 31 | 1999 | Low | Satisfactory |
| Gates Park Control Structure Black Hawk County | 16 | 1979 | Significant | Satisfactory |
| Fogle Lake Dam Ringgold County | 36 | 1996 | Significant | Satisfactory |
| Fieldstone Addition Dam Black Hawk County | 19 | 1998 | High | Satisfactory |
| Fellowship Lake Dam Tama County | 40 | 1940 | Low | Satisfactory |
| Fairfield Waterworks Dam No 2 Jefferson County | 33 | 1900 | Low | Satisfactory |
| Fairfield Water Works Dam No 1 Jefferson County | 40 | 1888 | Significant | Satisfactory |
| Emerald Valley Dam Clayton County | 47 | 2008 | Significant | Satisfactory |
| Elks Club Dam Floyd County | 7 | — | Low | Satisfactory |
| East Lenox Reservoir Dam Adams County | 25 | 1913 | Significant | Satisfactory |
| East Lake Dam Clarke County | 41 | 1915 | Significant | Satisfactory |
| Easter Lake Stormwater Retention Basin - Site 9 Polk County | 24 | 2005 | High | Satisfactory |
| Easter Lake Retention Basin # 10 Polk County | 22 | 2005 | Significant | Satisfactory |
| Easter Lake Retention Basin #1 Polk County | 18 | 2005 | Significant | Satisfactory |
| Easter Lake Dam Polk County | 43 | 1967 | Significant | Satisfactory |
| Earl Anderson Dam Dallas County | 30 | 1996 | Low | Satisfactory |
| Drews Lake Dam Dallas County | 20 | 2005 | Significant | Satisfactory |
| Doty Dam Dallas County | 30 | 1961 | Significant | Satisfactory |
| Don Williams Lake Dam Boone County | 58 | 1965 | Significant | Satisfactory |
| Dmacc Dam Polk County | 37 | 1984 | Significant | Satisfactory |
| Diamond Lake Watershed Site C-14 Poweshiek County | 29 | 1972 | Significant | Satisfactory |
| Diamond Lake Dam (Poweshiek Co) Poweshiek County | 40 | 1952 | Significant | Satisfactory |
| Diamondhead Lake Dam Guthrie County | 43 | 1963 | Significant | Satisfactory |
| Desoto Dam Pottawattamie County | 25 | 1960 | Low | Satisfactory |
| Deer Creek Dam Plymouth County | 55 | 1995 | High | Satisfactory |
Data sourced from the National Inventory of Dams (NID). Hazard classification reflects potential consequences of failure, not the likelihood of failure.