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 151–175 of 274
| Dam Name | Height (ft) | Year | Hazard | Condition |
|---|---|---|---|---|
| Lake Sundown Dam Appanoose County | 51 | 1976 | Significant | Satisfactory |
| Lake Wapello Dam Davis County | 57 | 1934 | Significant | Satisfactory |
| Lakewood Hills Dam Black Hawk County | 18 | 1967 | Significant | Satisfactory |
| Leutzinger-Lowe Watershed Site M-1 Muscatine County | 46 | 1971 | Significant | Satisfactory |
| Lincoln Ridge Estates Dam Greene County | 33 | 2007 | Significant | Fair |
| Little River Watershed Site 51-1 Decatur County | 30 | 2005 | Significant | Satisfactory |
| Little River Watershed Site 65 Decatur County | 45 | 1987 | Significant | Fair |
| Little River Watershed Site 65-3 Decatur County | 22 | 1980 | Significant | Satisfactory |
| Little Whiskey Subwatershed Site M-2 Woodbury County | 42 | 1990 | Significant | Satisfactory |
| Lower Centerville Reservoir Dam Appanoose County | 39 | 1912 | Significant | Fair |
| Lower Pine Lake Dam Hardin County | 33 | 1922 | Significant | Satisfactory |
| Maquoketa Milldam Jackson County | 26 | 1923 | Significant | Satisfactory |
| Marion County Roadgrade Dam 17-76-18 Marion County | 40 | 1965 | Significant | Poor |
| Mc Dowel Dam #1 Lee County | 40 | 1967 | Significant | Satisfactory |
| Mc Dowell Lake Dam 2 Lee County | 29 | 1967 | Significant | Fair |
| Mc Kinley Lake Dam Union County | 19 | 1920 | Significant | Satisfactory |
| Meadow Lake Dam Adair County | 39 | 1964 | Significant | Fair |
| Mill Picayune Watershed Site M-1 Crawford County | 36 | 1980 | Significant | Not Rated |
| Mill Picayune Watershed Site M-2 Crawford County | 37 | 1984 | Significant | Not Rated |
| Mill Picayune Watershed Site M-21-1 Shelby County | 36 | 1980 | Significant | Not Rated |
| Mill Picayune Watershed Site M-21-5 Shelby County | 48 | 1980 | Significant | Satisfactory |
| Mill Picayune Watershed Site M-22-3 Shelby County | 37 | 1978 | Significant | Satisfactory |
| Mill Picayune Watershed Site M-24-14 Shelby County | 40 | 1961 | Significant | Satisfactory |
| Mill Picayune Watershed Site M-24-17 Shelby County | 40 | 1984 | Significant | Satisfactory |
| Mill Picayune Watershed Site M-35-1 Crawford County | 37 | 1984 | Significant | Not Rated |
Data sourced from the National Inventory of Dams (NID). Hazard classification reflects potential consequences of failure, not the likelihood of failure.