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 901–925 of 4,124
| Dam Name | Height (ft) | Year | Hazard | Condition |
|---|---|---|---|---|
| Dugout Creek Wetland Dam Dickinson County | 12 | 1993 | Low | Not Rated |
| Dukes Dam Adair County | 24 | 2002 | Low | Not Rated |
| Dunham Dam Crawford County | 58 | 1970 | Low | Not Rated |
| Dunham Dam Johnson County | 38 | 1978 | Low | Not Rated |
| Dunn Dam Montgomery County | 32 | 1990 | Low | Not Rated |
| Dutch Hollow Subwatershed Site 1-2 Woodbury County | 40 | 1989 | Low | Not Rated |
| Dutch Hollow Subwatershed Site 1-3 Woodbury County | 35 | 1991 | Low | Not Rated |
| Dutch Hollow Subwatershed Site 1-5 Woodbury County | 26 | 1994 | Low | Not Rated |
| Dutch Hollow Subwatershed Site 1-8 Woodbury County | 45 | 1994 | Low | Not Rated |
| Dutch Hollow Subwatershed Site 1a-1 Woodbury County | 41 | 1991 | Low | Not Rated |
| Dutch Hollow Subwatershed Site 4-1 Woodbury County | 42 | 1984 | Low | Not Rated |
| Dutch Hollow Subwatershed Site M-1 Woodbury County | 26 | 1983 | Low | Not Rated |
| Dutch Hollow Subwatershed Site M-2 Woodbury County | 28 | 1984 | Low | Not Rated |
| Dutch Hollow Subwatershed Site M-3 Woodbury County | 42 | 1984 | Low | Not Rated |
| Dutch Hollow Subwatershed Site M-4 Woodbury County | 33 | 1984 | Low | Not Rated |
| Dykes Dam Davis County | 27 | 2010 | Low | Not Rated |
| Dyson Dam Monroe County | 30 | 1991 | Low | Not Rated |
| Dzaboff Dam Delaware County | 28 | 1970 | Low | Not Rated |
| Eagle Pond Dam Boone County | 49 | — | Low | Not Rated |
| Eakins Davis County | 27 | 2002 | Low | Not Rated |
| Earl Anderson Dam Dallas County | 30 | 1996 | Low | Satisfactory |
| Eason Dam Ida County | 24 | 2002 | Low | Not Rated |
| Eason Dam Greene County | 37 | 1970 | Low | Not Rated |
| East Aldrich Subwatershed B-4780 Ida County | 40 | 1954 | Low | Not Rated |
| East Aldrich Subwatershed B-6603 Ida County | 35 | 1954 | Low | Not Rated |
Data sourced from the National Inventory of Dams (NID). Hazard classification reflects potential consequences of failure, not the likelihood of failure.