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 51–75 of 4,124
| Dam Name | Height (ft) | Year | Hazard | Condition |
|---|---|---|---|---|
| Anderson Dam Pottawattamie County | 31 | 1971 | Low | Not Rated |
| Anderson Dam Clay County | 31 | 2005 | Low | Not Rated |
| Anderson Dam Ringgold County | 24 | 1982 | Low | Not Rated |
| Anderson/Timmerman Dam Adams County | 27 | 1967 | Low | Not Rated |
| Anderson/Weakland Dam Clarke County | 26 | 1969 | Low | Not Rated |
| Anderzhon Dam Fremont County | 31 | 1965 | Low | Not Rated |
| Anderzhon Dam Fremont County | 33 | 1966 | Low | Not Rated |
| Andresen/Coberly Dam Monona County | 60 | 1977 | Low | Not Rated |
| Andrew Dam Decatur County | 30 | 1983 | Low | Not Rated |
| Andriano Dam Warren County | 27 | 1969 | Low | Not Rated |
| Andrian-Wright-Idnr Washington County | 23 | 2005 | Low | Not Rated |
| Angran Dam Monroe County | 33 | 2001 | Low | Not Rated |
| Ankeny Golf & Country Club Dam Polk County | 31 | 1962 | Low | Not Rated |
| Anna Smith Dam Cass County | 29 | 2023 | Low | Not Rated |
| Anthon Subwatershed 1-2261 Woodbury County | 28 | 1954 | Significant | Fair |
| Anthon Subwatershed M-4001 Woodbury County | 28 | 1954 | Low | Not Rated |
| Anthon Subwatershed Site 2-2760 Woodbury County | 25 | 1954 | Low | Not Rated |
| Appanoose Country Club Dam Appanoose County | 33 | 1999 | Low | Not Rated |
| Appanoose County Roadgrade Appanoose County | 24 | 1988 | Low | Not Rated |
| Appanoose County Roadgrade Appanoose County | 27 | 1988 | Low | Not Rated |
| Appanoose County Roadgrade Dam 19-69-19 Appanoose County | 29 | 1965 | Low | Not Rated |
| Appanoose County Roadgrade Dam 2-68-18 Appanoose County | 25 | 1964 | Low | Not Rated |
| Appanoose County Roadgrade Dam 27-68-19 Appanoose County | 26 | 1966 | Low | Not Rated |
| Appanoose County Roadgrade Dam 32-68-18 Appanoose County | 30 | 1969 | Low | Not Rated |
| Appanoose County Roadgrade Dam L-3-65 Appanoose County | 27 | 1964 | Low | Not Rated |
Data sourced from the National Inventory of Dams (NID). Hazard classification reflects potential consequences of failure, not the likelihood of failure.