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 3626–3650 of 3,759
| Dam Name | Height (ft) | Year | Hazard | Condition |
|---|---|---|---|---|
| West Sunnyside Watershed Site C-8 Plymouth County | 24 | 1970 | Low | Not Rated |
| West Sunnyside Watershed Site E-1 Plymouth County | 34 | 1970 | Low | Not Rated |
| West Wolf Creek Subwatershed Site 11 Woodbury County | 30 | 1991 | Low | Not Rated |
| West Wolf Creek Subwatershed Site 12l Woodbury County | 35 | 1990 | Low | Not Rated |
| West Wolf Creek Subwatershed Site 13 Woodbury County | 40 | 1990 | Low | Not Rated |
| West Wolf Creek Subwatershed Site 26 Woodbury County | 33 | 1995 | Low | Not Rated |
| West Wolf Creek Subwatershed Site 30a Woodbury County | 31 | 1995 | Low | Not Rated |
| West Wolf Creek Subwatershed Site 34 Woodbury County | 28 | 1997 | Low | Not Rated |
| West Wolf Creek Subwatershed Site 35 Woodbury County | 41 | 1997 | Low | Not Rated |
| West Wolf Creek Subwatershed Site 44-A Woodbury County | 27 | 1997 | Low | Not Rated |
| Whaley/Williams Dam Henry County | 33 | 1968 | Low | Not Rated |
| Wheaton Dam Davis County | 27 | — | Low | Not Rated |
| Wheeler Dam Montgomery County | 27 | 2002 | Low | Not Rated |
| Wheeler Dam O'Brien County | 37 | 1995 | Low | Not Rated |
| Wheeler Dam Mahaska County | 28 | 1960 | Low | Not Rated |
| Whiskey Hollow Watershed - Bell Site Louisa County | 34 | 1986 | Low | Not Rated |
| Whiskey Hollow Watershed - Lewis Site Louisa County | 33 | 1986 | Low | Not Rated |
| Whispering Pines Dam Audubon County | 30 | 1971 | Low | Not Rated |
| White Dam Dubuque County | 37 | 2007 | Low | Not Rated |
| White Dam Winneshiek County | 24 | 2003 | Low | Not Rated |
| White Dam Davis County | 28 | 1974 | Low | Not Rated |
| White Dam Buena Vista County | 9 | 2022 | Low | Not Rated |
| White Dam Taylor County | 34 | 1975 | Low | Not Rated |
| White Dam Marion County | 35 | 1974 | Low | Not Rated |
| White Dam Des Moines County | 40 | 1988 | Low | Not Rated |
Data sourced from the National Inventory of Dams (NID). Hazard classification reflects potential consequences of failure, not the likelihood of failure.