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 2951–2975 of 3,759
| Dam Name | Height (ft) | Year | Hazard | Condition |
|---|---|---|---|---|
| Stanley Dam Warren County | 22 | 1967 | Low | Not Rated |
| St Ansgar Milldam Mitchell County | 9 | 1919 | Low | Not Rated |
| Stanton Dam Montgomery County | 10 | — | Low | Not Rated |
| Stanzel Christian High School Dam Adair County | 36 | 1970 | Low | Not Rated |
| Statler Dam Washington County | 25 | 1969 | Low | Not Rated |
| Steamboat Rock Dam Hardin County | 12 | 1930 | Low | Not Rated |
| Stearns Dam Clarke County | 30 | 1993 | Low | Not Rated |
| Steding Dam Hardin County | 29 | 2003 | Low | Not Rated |
| Steele Dam Appanoose County | 18 | 1967 | Low | Not Rated |
| Steinbeck Dam Benton County | 28 | 1989 | Low | Not Rated |
| Steinbeck/Iowa Dnr Washington County | 27 | 2003 | Low | Not Rated |
| Stennett-Red Oak Watershed Site 1 Montgomery County | 29 | 1971 | Low | Not Rated |
| Stennett-Red Oak Watershed Site 11 Montgomery County | 40 | 1965 | Low | Not Rated |
| Stennett-Red Oak Watershed Site 14 Montgomery County | 34 | 1965 | Low | Not Rated |
| Stennett-Red Oak Watershed Site 17 Montgomery County | 22 | 1971 | Low | Not Rated |
| Stennett-Red Oak Watershed Site 18 Montgomery County | 39 | 1971 | Low | Not Rated |
| Stennett-Red Oak Watershed Site 19 Montgomery County | 43 | 1971 | Low | Not Rated |
| Stennett-Red Oak Watershed Site 3 Montgomery County | 38 | 1971 | Low | Not Rated |
| Stennett-Red Oak Watershed Site 4 Montgomery County | 29 | 1971 | Low | Not Rated |
| Stennett-Red Oak Watershed Site 7 Montgomery County | 36 | 1971 | Low | Not Rated |
| Stennett-Red Oak Watershed Site 8 Montgomery County | 32 | 1965 | Low | Not Rated |
| Stennett-Red Oak Watershed Site 8a Montgomery County | 37 | 1965 | Low | Not Rated |
| Stephany Dam Harrison County | 26 | 1945 | Low | Not Rated |
| Stephens Dam Ringgold County | 29 | 2003 | Low | Not Rated |
| Stephens Forest Dam #1 Lucas County | 38 | 1971 | Low | Not Rated |
Data sourced from the National Inventory of Dams (NID). Hazard classification reflects potential consequences of failure, not the likelihood of failure.