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 1501–1525 of 3,759
| Dam Name | Height (ft) | Year | Hazard | Condition |
|---|---|---|---|---|
| Iowa Noname7 Clarke County | 26 | 1968 | Low | Not Rated |
| Iowa Noname70 Harrison County | 31 | 1976 | Low | Not Rated |
| Iowa Noname71 Guthrie County | 27 | 1976 | Low | Not Rated |
| Iowa Noname73 Madison County | 18 | 1975 | Low | Not Rated |
| Iowa Noname74 Louisa County | 29 | 1976 | Low | Not Rated |
| Iowa Noname75 Union County | 36 | 1977 | Low | Not Rated |
| Iowa Noname76 Monona County | 45 | 1974 | Low | Not Rated |
| Iowa Noname77 Marshall County | 24 | 1976 | Low | Not Rated |
| Iowa Noname78 Winneshiek County | 21 | 1974 | Low | Not Rated |
| Iowa Noname79 Pottawattamie County | 19 | 1973 | Low | Not Rated |
| Iowa Noname8 Crawford County | 38 | 1964 | Low | Not Rated |
| Iowa Noname80 Woodbury County | 32 | 1975 | Low | Not Rated |
| Iowa Noname81 Warren County | 29 | 1974 | Low | Not Rated |
| Iowa Noname84 Washington County | 39 | 1974 | Low | Not Rated |
| Iowa Noname85 Fremont County | 39 | 1976 | Low | Not Rated |
| Iowa Noname86 Fremont County | 63 | 1976 | Low | Not Rated |
| Iowa Noname87 Fremont County | 50 | 1976 | Low | Not Rated |
| Iowa Noname88 Appanoose County | 30 | 1978 | Low | Not Rated |
| Iowa Noname89 Jasper County | 37 | 1980 | Low | Not Rated |
| Iowa Noname90 Jasper County | 14 | 1979 | Low | Not Rated |
| Iowa Noname91 Des Moines County | 29 | 1980 | Low | Not Rated |
| Iowa Noname92 Keokuk County | 25 | 1980 | Low | Not Rated |
| Iowa Noname93 Keokuk County | 31 | 1980 | Low | Not Rated |
| Iowa Noname94 Wayne County | 30 | 1980 | Low | Not Rated |
| Iowa Noname95 Wayne County | 36 | 1980 | Low | Not Rated |
Data sourced from the National Inventory of Dams (NID). Hazard classification reflects potential consequences of failure, not the likelihood of failure.