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 3476–3500 of 3,759
| Dam Name | Height (ft) | Year | Hazard | Condition |
|---|---|---|---|---|
| Waubonsie Cr. Watershed Site 36-2 Mills County | 53 | 1983 | Low | Not Rated |
| Waubonsie Cr. Watershed Site 36-3 Mills County | 47 | 1983 | Low | Not Rated |
| Waubonsie Cr. Watershed Site 37-1 Mills County | 53 | 1983 | Low | Not Rated |
| Waubonsie Cr. Watershed Site 39 Mills County | 40 | 1983 | Low | Not Rated |
| Waubonsie Cr. Watershed Site 39-1 Mills County | 37 | 1983 | Low | Not Rated |
| Waubonsie Cr. Watershed Site 9-1 Mills County | 47 | 1976 | Low | Not Rated |
| Waucoma Milldam Fayette County | 11 | 1914 | Low | Not Rated |
| Waveland Bighole 3 Pottawattamie County | 26 | 1985 | Low | Not Rated |
| Waverly Milldam Bremer County | 12 | 1872 | Low | Satisfactory |
| Wayne CO Road Dam 32-70-20 Wayne County | 20 | 2003 | Low | Not Rated |
| Wayne Co. Roadgrade Dam 10-69-21 Wayne County | 36 | 1987 | Low | Not Rated |
| Wayne Co. Roadgrade Dam 16-69-21 Wayne County | 22 | 1996 | Low | Not Rated |
| Wayne Co. Roadgrade Dam 21-69-20 Wayne County | 29 | 1993 | Low | Not Rated |
| Wayne Co. Roadgrade Dam 2-67-22 Wayne County | 34 | 1987 | Low | Not Rated |
| Wayne Co. Roadgrade Dam - Bellen Site Wayne County | 38 | 1996 | Low | Not Rated |
| Wayne Co. Roadgrade Dam - Garber Site Wayne County | 49 | 1996 | Low | Not Rated |
| Wayne Co. Roadgrade Dam - Garber Site 2 Wayne County | 28 | 1996 | Low | Not Rated |
| Wayne Co. Roadgrade Dam - Stokes Site Wayne County | 30 | 1996 | Low | Not Rated |
| Wayne County Road Dam 26-70-22 Wayne County | 24 | 2002 | Low | Not Rated |
| Wayne County Roadgrade Dam 26-70-22 Wayne County | 28 | 2001 | Low | Not Rated |
| Wayne County Roadgrade Dam 3-70-21 Wayne County | 23 | 1967 | Low | Not Rated |
| Wayne County Roadgrade Dam 7-69-20 Wayne County | 24 | 1989 | Low | Not Rated |
| Weakland Dam Clarke County | 23 | 1972 | Low | Not Rated |
| Weatherly/Haight Dam Harrison County | 57 | 1967 | Low | Not Rated |
| Weaver Dam Warren County | 32 | 1976 | Low | Not Rated |
Data sourced from the National Inventory of Dams (NID). Hazard classification reflects potential consequences of failure, not the likelihood of failure.