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 301–325 of 4,124
| Dam Name | Height (ft) | Year | Hazard | Condition |
|---|---|---|---|---|
| Big Mill Wetlands Dam Jackson County | 11 | 1981 | Low | Not Rated |
| Big Park Watershed Site A-1 Crawford County | 32 | 1970 | Low | Not Rated |
| Big Park Watershed Site A-2 Crawford County | 45 | 1960 | Low | Not Rated |
| Big Park Watershed Site A-3 Crawford County | 41 | 1970 | Low | Not Rated |
| Big Park Watershed Site A-4 Crawford County | 32 | 1970 | Low | Not Rated |
| Big Park Watershed Site C-1 Crawford County | 43 | 1962 | Low | Not Rated |
| Big Park Watershed Site C-2 Crawford County | 36 | 1962 | Low | Not Rated |
| Big Park Watershed Site C-3 Crawford County | 35 | 1962 | Low | Not Rated |
| Big Park Watershed Site C-4 Crawford County | 33 | 1962 | Low | Not Rated |
| Big Park Watershed Site D-1 Crawford County | 43 | 1960 | Low | Not Rated |
| Big Park Watershed Site D-2 Crawford County | 36 | 1960 | Low | Not Rated |
| Big Park Watershed Site D-3 Crawford County | 36 | 1960 | Low | Not Rated |
| Big Park Watershed Site D-4 Crawford County | 39 | 1960 | Low | Not Rated |
| Big Park Watershed Site F-1 Crawford County | 35 | 1965 | Low | Not Rated |
| Big Park Watershed Site F-2 Crawford County | 45 | 1970 | Low | Not Rated |
| Big Park Watershed Site F-3 Crawford County | 33 | 1965 | Low | Not Rated |
| Big Whiskey 1 Subwatershed Site 13-1 Woodbury County | 26 | 1967 | Low | Not Rated |
| Big Whiskey 1 Subwatershed Site 13-2 Woodbury County | 22 | 1967 | Low | Not Rated |
| Big Whiskey 1 Subwatershed Site 3-1 Woodbury County | 38 | 1968 | Significant | Fair |
| Big Whiskey Subwatershed Site 6-2 Woodbury County | 37 | 1967 | Low | Not Rated |
| Big Wyacondah Watershed Site 10 Davis County | 26 | 1976 | Low | Not Rated |
| Big Wyacondah Watershed Site 13 Davis County | 28 | 1976 | Low | Not Rated |
| Big Wyacondah Watershed Site 14a Davis County | 24 | 1968 | Low | Not Rated |
| Big Wyacondah Watershed Site 16 Davis County | 28 | 1976 | Low | Not Rated |
| Big Wyacondah Watershed Site 18-1 Davis County | 21 | 1966 | Low | Not Rated |
Data sourced from the National Inventory of Dams (NID). Hazard classification reflects potential consequences of failure, not the likelihood of failure.