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 126–150 of 259
| Dam Name | Height (ft) | Year | Hazard | Condition |
|---|---|---|---|---|
| Lake Homestead Dam Jackson County | 36 | 1978 | Significant | Satisfactory |
| Lake Halice Dam Polk County | 27 | 1961 | Significant | Satisfactory |
| Lake Fisher Dam Davis County | 43 | 1937 | Significant | Satisfactory |
| Lake Delhi Dam Delaware County | 55 | 1922 | Significant | Satisfactory |
| Lake Darling Dam Washington County | 47 | 1950 | Significant | Satisfactory |
| Lake Colchester Dam Warren County | 31 | 1965 | Significant | Satisfactory |
| Lake Cimarron Poweshiek County | 27 | 2012 | High | Satisfactory |
| Lake Belva Deer Dam Keokuk County | 55 | 2001 | Significant | Satisfactory |
| Lake Anita Dam Cass County | 53 | 1970 | Significant | Satisfactory |
| Lake Ahquabi Dam Warren County | 43 | 1935 | Significant | Satisfactory |
| Lacey-Keosaqua Park Lake Dam Van Buren County | 47 | 1930 | Low | Satisfactory |
| Jsc Farms Dam Dallas County | 49 | 1995 | Significant | Satisfactory |
| Jordan Creek Mall - South Dam Dallas County | 17 | 2006 | Significant | Satisfactory |
| Jordan Creek Mall - Northwest Dam Dallas County | 17 | 2006 | Significant | Satisfactory |
| John Deere Tcao Dam Black Hawk County | 15 | 1980 | Significant | Satisfactory |
| John Deere Davenport Works Dam Scott County | 24 | 1975 | Significant | Satisfactory |
| Jester Park Estates Dam Polk County | 11 | 2005 | Significant | Satisfactory |
| Jefferson Park Watershed Site 5 Wapello County | 43 | 1985 | High | Satisfactory |
| Jefferson Park Watershed Site 4 Wapello County | 36 | 1978 | High | Satisfactory |
| Jefferson Park Watershed Site 3 Wapello County | 42 | 1976 | High | Satisfactory |
| Jefferson Park Watershed Site 10 Wapello County | 30 | 1983 | High | Satisfactory |
| Jefferson Park Watershed Site 1 Wapello County | 36 | 1976 | High | Satisfactory |
| Izzak Walton League Dam Wapello County | 35 | 1965 | Significant | Satisfactory |
| Izaak Walton Lake Dam Des Moines County | 22 | 1921 | Significant | Satisfactory |
| Iris Lake Dam Fayette County | 66 | 2004 | Low | Satisfactory |
Data sourced from the National Inventory of Dams (NID). Hazard classification reflects potential consequences of failure, not the likelihood of failure.