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 2976–3000 of 3,759
| Dam Name | Height (ft) | Year | Hazard | Condition |
|---|---|---|---|---|
| Stephens Forest Pond Dam Lucas County | 33 | 1972 | Low | Not Rated |
| Sterner Dam Ringgold County | 31 | 1997 | Low | Not Rated |
| Stevenson Dam Mills County | 27 | 2023 | Low | Not Rated |
| Stevenson Dam Henry County | 22 | 1965 | Low | Not Rated |
| Stever Dam Jefferson County | 30 | 1997 | Low | Not Rated |
| Stewart Dam Lee County | 28 | 1989 | Low | Not Rated |
| Stewart Dam Davis County | 16 | 2001 | Low | Not Rated |
| St Fork Grand River Wtrshd Site D-58 Ringgold County | 25 | 2006 | Low | Not Rated |
| Stickles Dam Union County | 31 | 1977 | Low | Not Rated |
| Stills Dam Warren County | 20 | 2003 | Low | Not Rated |
| Stills Dam Warren County | 24 | 1995 | Low | Not Rated |
| Stills Dam Appanoose County | 31 | 2007 | Low | Not Rated |
| Stimson Farms Dam Page County | 34 | 2021 | Low | Not Rated |
| Stober Dam Davis County | 22 | 2000 | Low | Not Rated |
| Stoeffer Dam Story County | 27 | 1987 | Low | Not Rated |
| Stone Dam Louisa County | 36 | 1988 | Low | Not Rated |
| Stoner Dam Fremont County | 40 | 1959 | Low | Not Rated |
| Stoppelmoor Dam Johnson County | 24 | 1974 | Low | Not Rated |
| Straight Dam Harrison County | 39 | 2011 | Low | Not Rated |
| Strathman Dam Davis County | 27 | 1999 | Low | Not Rated |
| Stratton Dam Story County | 39 | 1976 | Low | Not Rated |
| Stroburg Dam Adair County | 33 | 1967 | Low | Not Rated |
| Stroburg Dam Taylor County | 31 | 1965 | Low | Not Rated |
| Strotenbecker Dam Mills County | 36 | 1960 | Low | Not Rated |
| Strunk Dam Lee County | 41 | 1900 | Low | Not Rated |
Data sourced from the National Inventory of Dams (NID). Hazard classification reflects potential consequences of failure, not the likelihood of failure.