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 2776–2800 of 4,124
| Dam Name | Height (ft) | Year | Hazard | Condition |
|---|---|---|---|---|
| Prescott Flood Prevention Dam Adams County | 27 | 1973 | High | Fair |
| Price Dam Appanoose County | 27 | 2001 | Low | Not Rated |
| Probasco Dam Appanoose County | 24 | 1982 | Low | Not Rated |
| Progress Park Dam Johnson County | 23 | 2005 | Significant | Satisfactory |
| Promise City Reservoir Dam Wayne County | 25 | 1900 | Low | Not Rated |
| Provost Bay Dam Sac County | 10 | — | Low | Not Rated |
| Putnam Dam Davis County | 33 | 1978 | Low | Not Rated |
| Putz Dam Warren County | 27 | 1966 | Low | Not Rated |
| Putz Dam Warren County | 32 | 1977 | Low | Not Rated |
| Q Pond Park Dam Clarke County | 34 | 1900 | Low | Not Rated |
| Quad Valley Subwatershed Site 1-2 Ida County | 37 | 1967 | Low | Not Rated |
| Quad Valley Subwatershed Site 1-3 Ida County | 29 | 1967 | Low | Not Rated |
| Quad Valley Subwatershed Site 1d-1 Ida County | 36 | 1967 | Low | Not Rated |
| Quasqueton Dam Buchanan County | 7 | 1932 | Low | Not Rated |
| Quastad Dam Emmet County | 35 | 1975 | Low | Not Rated |
| Queck Dam Madison County | 29 | 2001 | Low | Not Rated |
| Raber Dam Guthrie County | 37 | 1962 | Low | Not Rated |
| Rager Dam Harrison County | 58 | 2011 | Low | Not Rated |
| Railroad Lake Dam Scott County | 35 | 1983 | Significant | Satisfactory |
| Rainbow Lake Dam Tama County | 30 | 1952 | Low | Not Rated |
| Ralston Subwatershed Site 1-2 Woodbury County | 36 | 1969 | Low | Not Rated |
| Ralston Subwatershed Site 2-2 Cherokee County | 43 | 1969 | Low | Not Rated |
| Ralston Subwatershed Site 5-2 Cherokee County | 24 | 1969 | Low | Not Rated |
| Ralston Subwatershed Site M-2 Cherokee County | 27 | 1969 | Low | Not Rated |
| Ramsbottom Dam Adair County | 22 | 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.