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 3351–3375 of 3,759
| Dam Name | Height (ft) | Year | Hazard | Condition |
|---|---|---|---|---|
| Buck Dam Marshall County | 25 | 1968 | Low | Not Rated |
| Buck Dam Crawford County | 33 | 2000 | Low | Not Rated |
| Buch Dam Benton County | 32 | 1969 | Low | Not Rated |
| Bryant Dam O'Brien County | 25 | 1960 | Low | Not Rated |
| Brummer Dam Harrison County | 41 | 1945 | Low | Not Rated |
| Bruggemeyer Dam Henry County | 27 | 2000 | Low | Not Rated |
| Bruene-Spahn Subwtrshd Sta 32+82 #6 Woodbury County | 26 | 1964 | Low | Not Rated |
| Bruene Dam Woodbury County | 25 | 1959 | Low | Not Rated |
| Bruehahn Dam Clayton County | 24 | 1971 | Low | Not Rated |
| Brown Dam Union County | 30 | 1978 | Low | Not Rated |
| Brown Dam Henry County | 30 | 2021 | Low | Not Rated |
| Brown Dam Jefferson County | 32 | 1963 | Low | Not Rated |
| Brown Dam Union County | 28 | 1966 | Low | Not Rated |
| Brown Dam O'Brien County | 24 | 1970 | Low | Not Rated |
| Brown Dam O'Brien County | 24 | 2004 | Low | Not Rated |
| Brown Dam Ida County | 29 | 1961 | Low | Not Rated |
| Brooks Dam Henry County | 34 | 1964 | Low | Not Rated |
| Brody Dam Clarke County | 28 | 2000 | Low | Not Rated |
| Broderick Dam Dallas County | 26 | 1966 | Low | Not Rated |
| Brockman Dam Page County | 29 | 2024 | Low | Not Rated |
| Brock Dam Adams County | 23 | 1993 | Low | Not Rated |
| Bristow Dam Humboldt County | 29 | 1985 | Low | Not Rated |
| Brink Dam Fremont County | 27 | 2003 | Low | Not Rated |
| Brenton Farm Dam Dallas County | 26 | 1968 | Low | Not Rated |
| Bremer County Roadgrade Dam 22-91-13 Bremer County | 28 | 1987 | Low | Not Rated |
Data sourced from the National Inventory of Dams (NID). Hazard classification reflects potential consequences of failure, not the likelihood of failure.