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 1926–1950 of 4,124
| Dam Name | Height (ft) | Year | Hazard | Condition |
|---|---|---|---|---|
| Mc Combs Dam Taylor County | 25 | 1962 | Low | Not Rated |
| Mccollough Dam Crawford County | 28 | 2000 | Low | Not Rated |
| Mc Clurg Dam Davis County | 22 | 1972 | Low | Not Rated |
| Mcclure Trust Dam Davis County | 29 | 2016 | Low | Not Rated |
| Mc Clure Dam Davis County | 39 | 1997 | Low | Not Rated |
| Mc Clintic Dam Polk County | 31 | 1979 | Low | Not Rated |
| Mc Clendon Dam Harrison County | 31 | 2000 | Low | Not Rated |
| Mc Clellan/Leichty Dam Lee County | 30 | 1972 | Low | Not Rated |
| Mc Clellan Dam Guthrie County | 26 | 1968 | Low | Not Rated |
| Mc Clain Dam Poweshiek County | 26 | 1969 | Low | Not Rated |
| Mc Carroll Dam Wapello County | 22 | 2002 | Low | Not Rated |
| Mc Call Subwatershed Site M-5 Monona County | 32 | 1964 | Low | Not Rated |
| Mc Call Subwatershed Site M-3 Monona County | 30 | 1963 | Low | Not Rated |
| Mc Call Subwatershed Site M-2 Monona County | 47 | 1963 | Low | Not Rated |
| Mc Call Subwatershed Site M-1 Monona County | 56 | 1963 | Low | Not Rated |
| Mc Call Subwatershed Site 8-1 Monona County | 27 | 1964 | Low | Not Rated |
| Mc Call Subwatershed Site 32-1 Monona County | 26 | 1963 | Low | Not Rated |
| Mc Call Subwatershed Site 30-1 Monona County | 41 | 1963 | Low | Not Rated |
| Mc Call Subwatershed Site 10-3 Monona County | 25 | 1963 | Low | Not Rated |
| Mc Call Subwatershed Site 10-2 Monona County | 36 | 1963 | Low | Not Rated |
| Mc Call Subwatershed M-17070 Monona County | 23 | 1965 | Low | Not Rated |
| Mc Call Subwatershed 1-2182 Monona County | 27 | 1965 | Low | Not Rated |
| Mc Broom Dam Clarke County | 25 | 1970 | Low | Not Rated |
| Mc Aninch Dam Warren County | 27 | 1981 | Low | Not Rated |
| Mc Aninch Dam Warren County | 38 | 1977 | Low | Not Rated |
Data sourced from the National Inventory of Dams (NID). Hazard classification reflects potential consequences of failure, not the likelihood of failure.