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 3526–3550 of 3,759
| Dam Name | Height (ft) | Year | Hazard | Condition |
|---|---|---|---|---|
| Bennett Lake Dam Cedar County | 34 | 1968 | Low | Not Rated |
| Bennett Dam Polk County | 38 | 1987 | Low | Not Rated |
| Bengal Dam Plymouth County | 41 | 1973 | Low | Not Rated |
| Belva Deer Park Wetland Dam Keokuk County | 30 | 2001 | Low | Not Rated |
| Belva-Deer Park Sediment Dam Keokuk County | 29 | 1974 | Low | Not Rated |
| Beinhart Dam Washington County | 30 | 2023 | Low | Not Rated |
| Behrendt Dam Monona County | 38 | 2014 | Low | Not Rated |
| Behnken Dam Cass County | 23 | 2000 | Low | Not Rated |
| Beggs Dam Van Buren County | 26 | 1985 | Low | Not Rated |
| Beener Dam Warren County | 30 | 1970 | Low | Not Rated |
| Beemer Dam Taylor County | 23 | 1966 | Low | Not Rated |
| Beemer Dam Taylor County | 22 | 1972 | Low | Not Rated |
| Bee Jay Watershed Site 4 Pottawattamie County | 31 | 1977 | Low | Not Rated |
| Bee Jay Watershed Site 16 Pottawattamie County | 32 | 1977 | Low | Not Rated |
| Bee Jay Watershed Site 12 Pottawattamie County | 26 | 1964 | Low | Not Rated |
| Beedle Dam Pottawattamie County | 25 | 1960 | Low | Not Rated |
| Beech Lake Dam Warren County | 25 | 1961 | Low | Not Rated |
| Becker Dam Webster County | 33 | 1989 | Low | Not Rated |
| Bechert Dam - Lower Site Keokuk County | 7 | 1999 | Low | Not Rated |
| Beauchamp Dam Jefferson County | 31 | 2001 | Low | Not Rated |
| Beauchamp Dam Jefferson County | 24 | 1994 | Low | Not Rated |
| Beattle Dam Union County | 32 | 1969 | Low | Not Rated |
| Beattie Dam Union County | 43 | 1966 | Low | Not Rated |
| Beary Dam Lucas County | 33 | 1990 | Low | Not Rated |
| Bear Creek Watershed Site 56 Winneshiek County | 26 | 2002 | Low | Not Rated |
Data sourced from the National Inventory of Dams (NID). Hazard classification reflects potential consequences of failure, not the likelihood of failure.