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 176–200 of 259
| Dam Name | Height (ft) | Year | Hazard | Condition |
|---|---|---|---|---|
| Murguia Dam Des Moines County | 43 | 1978 | Significant | Satisfactory |
| Muscatine Power & Water Dam Muscatine County | 26 | 1985 | Significant | Satisfactory |
| Mystic Reservoir Dam Appanoose County | 31 | 1930 | Low | Satisfactory |
| New London Country Club Dam Henry County | 26 | 1910 | Low | Satisfactory |
| North Branch Ralston Creek Dam Johnson County | 37 | 1983 | High | Satisfactory |
| North Pigeon Cr Watershed Site M-1 Pottawattamie County | 62 | 1993 | Significant | Satisfactory |
| North Woods Lake Dam Decatur County | 57 | 1993 | Significant | Satisfactory |
| Oak Hill Plantation Dam Dallas County | 32 | 2004 | Significant | Satisfactory |
| Oak Lake Dam Kossuth County | 50 | 1971 | Significant | Satisfactory |
| Oakland Mills Dam Henry County | 10 | 1910 | Low | Satisfactory |
| Orient Lake Dam Adair County | 23 | 1969 | Significant | Satisfactory |
| Otter Creek Lake Dam Tama County | 45 | 1968 | Significant | Satisfactory |
| Ottumwa Wapello County | 16 | 1960 | Low | Satisfactory |
| Parkview Lake Dam Polk County | 21 | 1978 | High | Satisfactory |
| Pattison Dam Clayton County | 68 | 2008 | Low | Satisfactory |
| Pheasant Ridge Dam Dallas County | 54 | 1972 | Significant | Satisfactory |
| Pierce Creek No 1 Watershed Site 10 Page County | 42 | 1969 | Significant | Satisfactory |
| Pikes Peak Flood Control Dam Clayton County | 49 | 1938 | High | Satisfactory |
| Pilot Knob Lake Dam Hancock County | 18 | 1972 | Low | Satisfactory |
| Pleasant Creek Lake Dam Linn County | 73 | 1977 | High | Satisfactory |
| Pony Creek Watershed Site 10 Mills County | 60 | 1966 | Significant | Satisfactory |
| Pony Creek Watershed Site 17 Mills County | 62 | 1965 | Low | Satisfactory |
| Pony Creek Watershed Site 21 Mills County | 75 | 1971 | High | Satisfactory |
| Pony Creek Watershed Site 30 Mills County | 49 | 1964 | Significant | Satisfactory |
| Prairie Rose Lake Dam Shelby County | 55 | 1960 | Significant | Satisfactory |
Data sourced from the National Inventory of Dams (NID). Hazard classification reflects potential consequences of failure, not the likelihood of failure.