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 3426–3450 of 3,759
| Dam Name | Height (ft) | Year | Hazard | Condition |
|---|---|---|---|---|
| Walters Creek Watershed Site 4-2 Adams County | 34 | 1967 | Low | Not Rated |
| Walters Creek Watershed Site 43-1 Adams County | 33 | 1967 | Low | Not Rated |
| Walters Creek Watershed Site 44-1 Adams County | 33 | 1969 | Low | Not Rated |
| Walters Creek Watershed Site 5-1 Adams County | 25 | 1967 | Low | Not Rated |
| Walters Creek Watershed Site 5-2 Adams County | 31 | 1967 | Low | Not Rated |
| Walters Creek Watershed Site D-15-2 Adams County | 46 | 1972 | Low | Not Rated |
| Walters Creek Watershed Site D-23-2 Adams County | 30 | 1972 | Low | Not Rated |
| Walters Dam Hardin County | 30 | 1999 | Low | Not Rated |
| Walton Dam Benton County | 34 | 1998 | Low | Not Rated |
| Ward Dam Appanoose County | 29 | 1990 | Low | Not Rated |
| Wardyn Dam Guthrie County | 28 | 1974 | Low | Not Rated |
| Ware Dam Davis County | 26 | 2000 | Low | Not Rated |
| Warner Dam Wapello County | 35 | 1989 | Low | Not Rated |
| Warner Dam Page County | 29 | 1976 | Low | Not Rated |
| Warren Co. Conservatation Park Dam Warren County | 27 | 1961 | Low | Not Rated |
| Warren Dam Wayne County | 28 | 1998 | Low | Not Rated |
| Warriner Dam Boone County | 11 | 2023 | Low | Not Rated |
| Washburn Subwatershed Sta28+00 Gully3 Woodbury County | 32 | 1960 | Low | Not Rated |
| Washburn Subwatershed Sta 35+40 Gul.1 Woodbury County | 45 | 1960 | Low | Not Rated |
| Washington CO Road Dam 22-74-9 Washington County | 29 | 2005 | Low | Not Rated |
| Washington CO Road Dam 23-74-9 Washington County | 27 | 2005 | Low | Not Rated |
| Washington CO Road Dam 26-74-9 Washington County | 31 | 2005 | Low | Not Rated |
| Washington CO Road Dam 35-74-9 Washington County | 27 | 2004 | Low | Not Rated |
| Washington CO Road Dam 3-74-7 Washington County | 36 | 2002 | Low | Not Rated |
| Washington County Cons Bd Dam Washington County | 29 | 2000 | Low | Not Rated |
Data sourced from the National Inventory of Dams (NID). Hazard classification reflects potential consequences of failure, not the likelihood of failure.