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 1901–1925 of 4,124
| Dam Name | Height (ft) | Year | Hazard | Condition |
|---|---|---|---|---|
| Lake Fin-Feather Dam Cerro Gordo County | 25 | 1972 | Low | Not Rated |
| Lake Fisher Dam Davis County | 43 | 1937 | Significant | Satisfactory |
| Lake Halice Dam Polk County | 27 | 1961 | Significant | Satisfactory |
| Lake Hendricks Dam Howard County | 30 | 1960 | Significant | Poor |
| Lake Homestead Dam Jackson County | 36 | 1978 | Significant | Satisfactory |
| Lake Huntington Scott County | 35 | 1971 | Significant | Fair |
| Lake Icaria Dam (Site M-1-A Walters Cr) Adams County | 56 | 1974 | Significant | Satisfactory |
| Lake Icaria Sediment Detention Dam Adams County | 12 | 2004 | Low | Not Rated |
| Lake Iowa Dam Iowa County | 40 | 1962 | Significant | Fair |
| Lake Keomah Dam Mahaska County | 42 | 1935 | Significant | Satisfactory |
| Lake Keomah Silt Dam Mahaska County | 25 | 1938 | Low | Not Rated |
| Lake Lashane Dam Decatur County | 30 | 1954 | Significant | Satisfactory |
| Lake Macbride Dam Johnson County | 56 | 1930 | Significant | Satisfactory |
| Lake Maharry Dam Taylor County | 21 | 1969 | Low | Not Rated |
| Lake Meyer Dam Winneshiek County | 46 | 1966 | Significant | Fair |
| Lake Miami Dam Monroe County | 32 | 1966 | Significant | Satisfactory |
| Lake Miami Sediment Basin - Middle Site Monroe County | 33 | 2000 | Low | Not Rated |
| Lake Miami Sediment Contro Dam - South Site Monroe County | 26 | 2000 | Low | Not Rated |
| Lake Morris Dam Lucas County | 39 | 1993 | Significant | Fair |
| Lake Morris Erosion Control Site 1 Lucas County | 32 | 1972 | Low | Not Rated |
| Lake Morris Erosion Control Site 2 Lucas County | 25 | 1972 | Low | Not Rated |
| Lake Morris Erosion Control Site 3 Lucas County | 37 | 1972 | Low | Not Rated |
| Lake Morris Erosion Control Site 5 Lucas County | 31 | 1972 | Low | Not Rated |
| Lake Morris Erosion Control Site 7 Lucas County | 35 | 1972 | Low | Not Rated |
| Lake Morris Erosion Control Site 8 Lucas County | 21 | 1972 | Low | Not Rated |
Data sourced from the National Inventory of Dams (NID). Hazard classification reflects potential consequences of failure, not the likelihood of failure.