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 3226–3250 of 3,759
| Dam Name | Height (ft) | Year | Hazard | Condition |
|---|---|---|---|---|
| Collins Dam Davis County | 31 | 1997 | Low | Not Rated |
| Collier Dam Harrison County | 41 | 1974 | Low | Not Rated |
| College Corner Subwatershed Site 4-5 Woodbury County | 40 | 1967 | Low | Not Rated |
| College Corner Subwatershed Site 4-3 Woodbury County | 29 | 1967 | Low | Not Rated |
| College Corner Subwatershed Site 4-2 Woodbury County | 28 | 1966 | Low | Not Rated |
| College Corner Subwatershed Site 3-1 Woodbury County | 33 | 1968 | Low | Not Rated |
| Cole (South) Dam Van Buren County | 8 | 1999 | Low | Not Rated |
| Cole Dam Van Buren County | 7 | 1999 | Low | Not Rated |
| Cole Dam Jefferson County | 27 | 1991 | Low | Not Rated |
| Cold Springs Dam Cass County | 12 | 1949 | Low | Not Rated |
| Colby Dam Polk County | 26 | 1968 | Low | Not Rated |
| Cohrs Dam Harrison County | 36 | 2011 | Low | Not Rated |
| Coffman Dam Tama County | 26 | 1965 | Low | Not Rated |
| Coberly/Swenson Dam Monona County | 40 | 1964 | Low | Not Rated |
| Coberly Dam Monona County | 43 | 1970 | Low | Not Rated |
| Coberly/Butler Dam Monona County | 45 | 1968 | Low | Not Rated |
| Clymer Dam Jones County | 20 | 1997 | Low | Not Rated |
| Clyde Frizell Adair County | 26 | 2009 | Low | Not Rated |
| Clubine Dam Monona County | 42 | 2003 | Low | Not Rated |
| Cloud Dam Monona County | 32 | 1995 | Low | Not Rated |
| Clinton Dam Crawford County | 22 | 2008 | Low | Not Rated |
| Clint Means Dam Taylor County | 33 | 2021 | Low | Not Rated |
| Clevenger Dam Warren County | 30 | 2000 | Low | Not Rated |
| Cleveland Dam Harrison County | 41 | 2011 | Low | Not Rated |
| Clermont Milldam Fayette County | 16 | 1925 | Low | Not Rated |
Data sourced from the National Inventory of Dams (NID). Hazard classification reflects potential consequences of failure, not the likelihood of failure.