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 |
|---|---|---|---|---|
| Wenger Dam Washington County | 35 | 2005 | Low | Not Rated |
| Wenger Subwatershed M 130+73 Woodbury County | 30 | 1965 | Low | Not Rated |
| Wenger Subwatershed #M Sta 25+50 Woodbury County | 32 | 1965 | Low | Not Rated |
| Wenger Subwatershed Sta 16+00 #5 Woodbury County | 38 | 1965 | Low | Not Rated |
| Wenger Subwatershed Sta 32+00 #5 Woodbury County | 28 | 1965 | Low | Not Rated |
| Wenger Subwatershed Sta 43+88 #M Woodbury County | 36 | 1965 | Low | Not Rated |
| Weppler Dam Cass County | 33 | 2023 | Low | Not Rated |
| Weselmann Dam Winneshiek County | 31 | 2021 | Low | Not Rated |
| Wessel Sediment Basin Delaware County | 35 | 2005 | Low | Not Rated |
| West Aldrich Subwatershed Site 14-A-1 Ida County | 31 | 1992 | Low | Not Rated |
| West Beaver Subwatershed Sta 23+45 #A Monona County | 65 | 1961 | Low | Not Rated |
| West Beaver Subwatershed Sta 33+30 Monona County | 44 | 1961 | Low | Not Rated |
| West Beaver Subwatershed Sta 40+06 #A Monona County | 43 | 1961 | Low | Not Rated |
| West Beaver Subwatershed Sta 51+80 Monona County | 39 | 1961 | Low | Not Rated |
| West Beaver Subwatershed Sta 97+07 Monona County | 36 | 1961 | Low | Not Rated |
| West Dam Warren County | 9 | 2000 | Low | Not Rated |
| West Douglas Watershed Site B-1 Adams County | 35 | 1968 | Low | Not Rated |
| West Douglas Watershed Site B-2 Adams County | 29 | 1968 | Low | Not Rated |
| West Douglas Watershed Site E-1 Adams County | 23 | 1968 | Low | Not Rated |
| West Douglas Watershed Site K-1 Adams County | 28 | 1968 | Low | Not Rated |
| West Douglas Watershed Site K-2 Adams County | 31 | 1968 | Low | Not Rated |
| West Douglas Watershed Site L-1 Adams County | 33 | 1968 | Low | Not Rated |
| West Douglas Watershed Site L-12 Adams County | 33 | 1968 | Low | Not Rated |
| West Douglas Watershed Site L-5 Adams County | 30 | 1968 | Low | Not Rated |
| West Douglas Watershed Site L-6 Adams County | 39 | 1968 | Low | Not Rated |
Data sourced from the National Inventory of Dams (NID). Hazard classification reflects potential consequences of failure, not the likelihood of failure.