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 3726–3750 of 3,759
| Dam Name | Height (ft) | Year | Hazard | Condition |
|---|---|---|---|---|
| Woodbury County Roadgrade Dam 5-87-44 Woodbury County | 32 | 1991 | Low | Not Rated |
| Woods Hollow Subwatershed Site 1-2875 Monona County | 26 | 1960 | Low | Not Rated |
| Woods Hollow Subwatershed Site M-10450 Monona County | 25 | 1960 | Low | Not Rated |
| Woods Hollow Subwatershed Sta 40+42 Monona County | 35 | 1960 | Low | Not Rated |
| Woodward Dam Cass County | 31 | 1994 | Low | Not Rated |
| Woodward Glen Subwatershed Site 5800 Monona County | 31 | 1958 | Low | Not Rated |
| Woody Dam Jefferson County | 27 | 2003 | Low | Not Rated |
| Worrel Dam Cedar County | 27 | 1950 | Low | Not Rated |
| Wright Dam Appanoose County | 24 | 1990 | Low | Not Rated |
| Wright Dam Linn County | 25 | 1971 | Low | Not Rated |
| Wunschel Dam Ida County | 38 | 1997 | Low | Not Rated |
| Wuthrich Dam Davis County | 27 | 1996 | Low | Not Rated |
| Wuthrich Dam Davis County | 32 | 1976 | Low | Not Rated |
| Yahnke Dam Davis County | 30 | 1970 | Low | Not Rated |
| Yates Dam Appanoose County | 25 | 1972 | Low | Not Rated |
| Yellowbanks Dam Polk County | 41 | 1986 | Low | Satisfactory |
| Yellowsmoke Watershed Site D-1 Crawford County | 24 | 1989 | Low | Not Rated |
| Yellowsmoke Watershed Site D-2 Crawford County | 25 | 1989 | Low | Not Rated |
| Young Dam Buena Vista County | 29 | 1979 | Low | Not Rated |
| Young Dam Polk County | 31 | 2004 | Low | Not Rated |
| Young Dam Madison County | 35 | 1969 | Low | Not Rated |
| Young Dam Polk County | 25 | 1980 | Low | Not Rated |
| Youngren Dam Webster County | 38 | 1985 | Low | Not Rated |
| Zach Anderson Dam Montgomery County | 32 | 2024 | Low | Not Rated |
| Zach Mendenhall Dam Clarke County | 26 | 2017 | Low | Not Rated |
Data sourced from the National Inventory of Dams (NID). Hazard classification reflects potential consequences of failure, not the likelihood of failure.