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 1901–1925 of 4,124
| Dam Name | Height (ft) | Year | Hazard | Condition |
|---|---|---|---|---|
| Mc Intosh Dam Harrison County | 42 | 1977 | Low | Not Rated |
| Mchugh Dam Monona County | 31 | 2011 | Low | Not Rated |
| Mc Guire Dam Union County | 29 | 2003 | Low | Not Rated |
| Mc Grew Brothers Dam Mills County | 35 | 2001 | Low | Not Rated |
| Mc Glaughlin Wetland Dam Wright County | 9 | 2002 | Low | Not Rated |
| Mc Farland Lake Dam Story County | 27 | 1966 | Low | Not Rated |
| Mc Fadden Dam Clarke County | 40 | 1969 | Low | Not Rated |
| Mc Dowell Lake Dam 2 Lee County | 29 | 1967 | Significant | Fair |
| Mc Dowell Dam Wapello County | 38 | 1999 | Low | Not Rated |
| Mc Dowel Dam #1 Lee County | 40 | 1967 | Significant | Satisfactory |
| Mc Donnell Dam Ringgold County | 28 | 2004 | Low | Not Rated |
| Mc Donald Subwatershed Site 5-2290 Woodbury County | 33 | 1959 | Low | Not Rated |
| Mc Donald Subwatershed Site 1 Woodbury County | 35 | 1985 | Low | Not Rated |
| Mc Donald Subwatershed 4-2557 Woodbury County | 44 | 1960 | Low | Not Rated |
| Mc Donald Dam Van Buren County | 25 | 1964 | Low | Not Rated |
| Mc Donald Dam Union County | 30 | 2001 | Low | Not Rated |
| Mc Daniel Dam Story County | 38 | 1963 | Low | Not Rated |
| Mc Cunn Dam Page County | 26 | 1976 | Low | Not Rated |
| Mc Cune Dam Iowa County | 32 | 2001 | Low | Not Rated |
| Mc Creedy Dam Jefferson County | 31 | 2002 | Low | Not Rated |
| Mc Coy Dam Monroe County | 28 | 1994 | Low | Not Rated |
| Mc Cormick Wetland Dam Lucas County | 9 | 1999 | Low | Not Rated |
| Mc Cormick Dam Marion County | 26 | 1967 | Low | Not Rated |
| Mc Cormick Dam Marion County | 33 | 2001 | Low | Not Rated |
| Mc Cormick Dam Lucas County | 35 | 1965 | Low | Not Rated |
Data sourced from the National Inventory of Dams (NID). Hazard classification reflects potential consequences of failure, not the likelihood of failure.