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 1101–1125 of 3,759
| Dam Name | Height (ft) | Year | Hazard | Condition |
|---|---|---|---|---|
| Saxton Dam #2 Decatur County | 35 | 1987 | Low | Not Rated |
| Saxton Dam Decatur County | 29 | 1987 | Low | Not Rated |
| Sawgrass Park Dam Polk County | 27 | 1980 | Low | Fair |
| Savery/Welliver Dam Monona County | 57 | 1966 | Low | Fair |
| Sargent Dam Davis County | 24 | 1976 | Low | Not Rated |
| Sargent Dam Clarke County | 29 | 1993 | Low | Not Rated |
| Sanford Dam Warren County | 23 | 1992 | Low | Not Rated |
| Sandy Dam Lucas County | 31 | 1986 | Low | Not Rated |
| Sandven Dam Humboldt County | 36 | 1988 | Low | Not Rated |
| Sanders Dam Fremont County | 13 | 2001 | Low | Not Rated |
| Sandahl Dam Page County | 28 | 2024 | Low | Not Rated |
| Samuels Dam Madison County | 58 | 1960 | Low | Not Rated |
| Saint Patrick Church Dam Pottawattamie County | 29 | 2002 | Low | Not Rated |
| Sage Dam Jasper County | 28 | 1970 | Low | Not Rated |
| S 2nd Street Stormwater Detention Basin Marshall County | 11 | 1997 | Low | Not Rated |
| Ryun Dam Decatur County | 28 | 1994 | Low | Not Rated |
| Ryan Henschal Watershed Site H-1 Pottawattamie County | 39 | 1962 | Low | Not Rated |
| Ryan Henschal Watershed Site F-3 Pottawattamie County | 32 | 1964 | Low | Not Rated |
| Ryan Henschal Watershed Site F-2 Pottawattamie County | 41 | 1964 | Low | Not Rated |
| Ryan Henschal Watershed Site F-1 Pottawattamie County | 27 | 1965 | Low | Not Rated |
| Ryan Henschal Watershed Site E-2 Pottawattamie County | 49 | 1963 | Low | Not Rated |
| Ryan Henschal Watershed Site A-2 Pottawattamie County | 39 | 1976 | Low | Not Rated |
| Rutland Milldam Humboldt County | 12 | 1922 | Low | Not Rated |
| Rush Dam Warren County | 42 | 1972 | Low | Not Rated |
| Ruepke Dam Lucas County | 13 | 1994 | Low | Not Rated |
Data sourced from the National Inventory of Dams (NID). Hazard classification reflects potential consequences of failure, not the likelihood of failure.