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 26–50 of 4,124
| Dam Name | Height (ft) | Year | Hazard | Condition |
|---|---|---|---|---|
| Wunschel Dam Ida County | 38 | 1997 | Low | Not Rated |
| Wright Dam Appanoose County | 24 | 1990 | Low | Not Rated |
| Wright Dam Linn County | 25 | 1971 | Low | Not Rated |
| Worrel Dam Cedar County | 27 | 1950 | Low | Not Rated |
| Woody Dam Jefferson County | 27 | 2003 | Low | Not Rated |
| Woodward Glen Subwatershed Site 5800 Monona County | 31 | 1958 | Low | Not Rated |
| Woodward Dam Cass County | 31 | 1994 | Low | Not Rated |
| Woods Hollow Subwatershed Sta 40+42 Monona County | 35 | 1960 | Low | Not Rated |
| Woods Hollow Subwatershed Site M-10450 Monona County | 25 | 1960 | Low | Not Rated |
| Woods Hollow Subwatershed Site 1-2875 Monona County | 26 | 1960 | Low | Not Rated |
| Woodlands Parkway Dam Polk County | 28 | 1964 | Significant | Fair |
| Woodland Lake Dam Polk County | 43 | 1971 | Significant | Satisfactory |
| Woodbury County Roadgrade Dam 5-87-44 Woodbury County | 32 | 1991 | Low | Not Rated |
| Woodbury County Roadgrade Dam 36-86-42 Woodbury County | 42 | 1990 | Significant | Satisfactory |
| Woodbury County Roadgrade Dam 30-88-43 Woodbury County | 38 | 1999 | Low | Not Rated |
| Woodbury County Roadgrade Dam 18-87-44 Woodbury County | 44 | 1988 | Low | Not Rated |
| Woodbury County Road Dam 8-87-44 Woodbury County | 38 | 2001 | Low | Not Rated |
| Wolterman Dam Ida County | 28 | 1998 | Low | Not Rated |
| Wolfe Dam Madison County | 26 | 2000 | Low | Not Rated |
| Wolf Creek Subwatershed Site M-3 Woodbury County | 29 | 1971 | Low | Not Rated |
| Wolf Creek Subwatershed Site M-2 Woodbury County | 30 | 1971 | Low | Not Rated |
| Wolf Creek Subwatershed Site 6-1 Woodbury County | 26 | 1971 | Low | Not Rated |
| Wolf Creek Subwatershed Site 5a-1 Woodbury County | 40 | 1971 | Low | Not Rated |
| Wolf Creek Subwatershed Site 5-2 Woodbury County | 31 | 1971 | Low | Not Rated |
| Wolf Creek Subwatershed Site 5-1 Woodbury County | 27 | 1971 | Low | Not Rated |
Data sourced from the National Inventory of Dams (NID). Hazard classification reflects potential consequences of failure, not the likelihood of failure.