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 226–250 of 3,759
| Dam Name | Height (ft) | Year | Hazard | Condition |
|---|---|---|---|---|
| Wessel Sediment Basin Delaware County | 35 | 2005 | Low | Not Rated |
| Weselmann Dam Winneshiek County | 31 | 2021 | Low | Not Rated |
| Weppler Dam Cass County | 33 | 2023 | Low | Not Rated |
| Wenger Subwatershed Sta 43+88 #M Woodbury County | 36 | 1965 | Low | Not Rated |
| Wenger Subwatershed Sta 32+00 #5 Woodbury County | 28 | 1965 | Low | Not Rated |
| Wenger Subwatershed Sta 16+00 #5 Woodbury County | 38 | 1965 | Low | Not Rated |
| Wenger Subwatershed #M Sta 25+50 Woodbury County | 32 | 1965 | Low | Not Rated |
| Wenger Subwatershed M 130+73 Woodbury County | 30 | 1965 | Low | Not Rated |
| Wenger Dam Washington County | 35 | 2005 | Low | Not Rated |
| Wendl Dam Carroll County | 29 | 1959 | Low | Not Rated |
| Wells Dam Lucas County | 25 | 1960 | Low | Not Rated |
| Welch Dam Hardin County | 35 | 1972 | Low | Not Rated |
| Weiser Dam Clarke County | 43 | 2006 | Low | Not Rated |
| Weis Dam Union County | 34 | 1971 | Low | Not Rated |
| Weis Dam Woodbury County | 45 | 1976 | Low | Not Rated |
| Weimann Dam Audubon County | 31 | 1980 | Low | Not Rated |
| Weed Dam Crawford County | 37 | 1959 | Low | Not Rated |
| Wedeking Dam Butler County | 20 | 1971 | Low | Not Rated |
| Webster Dam Dallas County | 29 | 1979 | Low | Not Rated |
| Weber Creek Subwatershed Site M-9000 Woodbury County | 29 | 1955 | Low | Not Rated |
| Weber Creek Subwatershed Site M-5276 Woodbury County | 33 | 1955 | Low | Not Rated |
| Weber Creek Subwatershed Site M-18555 Woodbury County | 28 | 1956 | Low | Not Rated |
| Weber Creek Subwatershed Site M-17052 Woodbury County | 40 | 1956 | Low | Not Rated |
| Weber Creek Subwatershed Site M-15543 Woodbury County | 35 | 1956 | Low | Not Rated |
| Weber Creek Subwatershed Site M-13941 Woodbury County | 25 | 1955 | Low | Not Rated |
Data sourced from the National Inventory of Dams (NID). Hazard classification reflects potential consequences of failure, not the likelihood of failure.