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 3501–3525 of 3,759
| Dam Name | Height (ft) | Year | Hazard | Condition |
|---|---|---|---|---|
| Big Park Watershed Site A-1 Crawford County | 32 | 1970 | Low | Not Rated |
| Big Mill Wetlands Dam Jackson County | 11 | 1981 | Low | Not Rated |
| Big Creek Terminal Dam Polk County | 95 | 1972 | Low | Not Available |
| Big Coon Subwatershed Site M-5 Woodbury County | 20 | 2000 | Low | Not Rated |
| Big Coon Subwatershed Site L-3 Woodbury County | 22 | 1998 | Low | Not Rated |
| Big Coon Subwatershed Site D-2-1 Woodbury County | 42 | 1999 | Low | Not Rated |
| Big Coon Subwatershed Site 6h-2 Woodbury County | 33 | 1999 | Low | Not Rated |
| Big Coon Subwatershed Site 3a-4 Woodbury County | 36 | 1999 | Low | Not Rated |
| Big Coon Subwatershed Site 3-3 Woodbury County | 41 | 1999 | Low | Not Rated |
| Big Coon Subwatershed Site 2-9a Woodbury County | 45 | 1999 | Low | Not Rated |
| Big Coon Subwatershed Site 2-10a Woodbury County | 47 | 1999 | Low | Not Rated |
| Bierce Dam Clarke County | 27 | 1989 | Low | Not Rated |
| Beyer Dam Fremont County | 25 | 2005 | Low | Not Rated |
| Betty Beaman Adair County | 32 | 2014 | Low | Not Rated |
| Bertelsen Dam Audubon County | 25 | 1972 | Low | Not Rated |
| Bert Dam Davis County | 25 | 1976 | Low | Not Rated |
| Berryman Davis County | 30 | — | Low | Not Rated |
| Bernstein Estate Dam Mahaska County | 25 | 2000 | Low | Not Rated |
| Bernstein Dam Poweshiek County | 27 | 1979 | Low | Not Rated |
| Berns Dam Allamakee County | 24 | 2003 | Low | Not Rated |
| Berndt Dam Pottawattamie County | 33 | 2007 | Low | Not Rated |
| Bergstrom Dam Boone County | 42 | 1970 | Low | Not Rated |
| Bergeson Dam Cherokee County | 31 | 1959 | Low | Not Rated |
| Berg Dam Keokuk County | 29 | 1967 | Low | Not Rated |
| Bentley Dam Ringgold County | 26 | 2013 | Low | Not Rated |
Data sourced from the National Inventory of Dams (NID). Hazard classification reflects potential consequences of failure, not the likelihood of failure.