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 1451–1475 of 4,124
| Dam Name | Height (ft) | Year | Hazard | Condition |
|---|---|---|---|---|
| Heritage Point Lake Dam Wayne County | 47 | 1971 | Significant | Satisfactory |
| Heritage Woods Dam Dallas County | 35 | 2008 | High | Satisfactory |
| Herman Farms Dam Wapello County | 26 | 1998 | Low | Not Rated |
| Herring Dam Lucas County | 28 | 1987 | Low | Not Rated |
| Hertitage Hills Dam Louisa County | 26 | 1995 | Low | Not Rated |
| Hertz Dam Story County | 32 | 1959 | Low | Not Rated |
| Herzberg Dam Taylor County | 27 | 2020 | Low | Not Rated |
| Hess Dam Guthrie County | 21 | 1967 | Low | Not Rated |
| Hess Dam Dubuque County | 26 | 1970 | Low | Not Rated |
| Hess Dam #2 Guthrie County | 22 | 1969 | Low | Not Rated |
| Heston Dam Appanoose County | 26 | 1999 | Low | Not Rated |
| Heston/Johnson Dam Lucas County | 31 | 1978 | Low | Not Rated |
| Hiatt Dam Union County | 22 | 1968 | Low | Not Rated |
| Hickenbottom Dam Van Buren County | 26 | 1959 | Low | Not Rated |
| Hickenbottom Dam Jefferson County | 35 | 1985 | Low | Not Rated |
| Hickory Glen Park Dam Polk County | 35 | 2019 | Significant | Satisfactory |
| Hickory Grove Lake Dam Story County | 56 | 1966 | Significant | Satisfactory |
| Hickory Hills Recreation Dam Tama County | 29 | 1970 | Low | Satisfactory |
| Hickory Lake Dam Polk County | 34 | 1970 | Low | Not Rated |
| Hicks Dam Benton County | 26 | 2022 | Low | Not Rated |
| Hidden Acres Dam Webster County | 35 | 1990 | Low | Not Rated |
| Hieber Dam Monona County | 44 | 2000 | Low | Not Rated |
| Higdon Dam Decatur County | 33 | 2001 | Low | Not Rated |
| High Prairie Farms Dam Clarke County | 29 | 2000 | Low | Not Rated |
| Hildreth Dam Montgomery County | 25 | 1983 | Low | Not Rated |
Data sourced from the National Inventory of Dams (NID). Hazard classification reflects potential consequences of failure, not the likelihood of failure.