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 401–425 of 4,124
| Dam Name | Height (ft) | Year | Hazard | Condition |
|---|---|---|---|---|
| Walling Subwatershed Sta 18+02 #5 Woodbury County | 35 | 1953 | Low | Not Rated |
| Wallace Dam Pottawattamie County | 33 | 2004 | Low | Not Rated |
| Wallace Dam Greene County | 8 | 2024 | Low | Not Rated |
| Walker Dam Warren County | 32 | 1997 | Low | Not Rated |
| Walker Dam Des Moines County | 38 | 1985 | Low | Not Rated |
| Walker Dam Montgomery County | 30 | 2005 | Low | Not Rated |
| Walker Dam Louisa County | 31 | 1984 | Low | Not Rated |
| Wakonda Country Club Dam Polk County | 28 | 1995 | Low | Not Rated |
| Wahlert Dam Guthrie County | 26 | 1986 | Low | Not Rated |
| Wahlert Dam Audubon County | 31 | 2023 | Low | Not Rated |
| Wahl Dam Chickasaw County | 21 | 1976 | Low | Not Rated |
| Wahlberg Dam Woodbury County | 29 | 1977 | Low | Not Rated |
| Wagner Dam Louisa County | 25 | 1998 | Low | Not Rated |
| Wagner Dam Des Moines County | 42 | 1986 | Low | Not Rated |
| Wagner Dam Poweshiek County | 29 | 2001 | Low | Not Rated |
| Wadle Dam Warren County | 28 | 2005 | Low | Not Rated |
| Vowell Dam Madison County | 30 | 1988 | Low | Not Rated |
| Vowell Dam Madison County | 25 | 1981 | Low | Not Rated |
| Voss Dam Keokuk County | 26 | 1987 | Low | Not Rated |
| Vos Dam Plymouth County | 23 | 1979 | Low | Not Rated |
| Vos Dam Mahaska County | 30 | 1968 | Low | Not Rated |
| Vontersch/Ahrenholtz Dam Crawford County | 29 | 1974 | Low | Not Rated |
| Von Maur Dam Jackson County | 24 | 2012 | Low | Not Rated |
| Voltmer Dam Warren County | 31 | 1990 | Low | Not Rated |
| Vollmar Dam Ida County | 33 | 1957 | Low | Not Rated |
Data sourced from the National Inventory of Dams (NID). Hazard classification reflects potential consequences of failure, not the likelihood of failure.