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 1726–1750 of 3,759
| Dam Name | Height (ft) | Year | Hazard | Condition |
|---|---|---|---|---|
| Lake Miami Sediment Basin - Middle Site Monroe County | 33 | 2000 | Low | Not Rated |
| Lake Miami Sediment Contro Dam - South Site Monroe County | 26 | 2000 | Low | Not Rated |
| Lake Morris Erosion Control Site 1 Lucas County | 32 | 1972 | Low | Not Rated |
| Lake Morris Erosion Control Site 2 Lucas County | 25 | 1972 | Low | Not Rated |
| Lake Morris Erosion Control Site 3 Lucas County | 37 | 1972 | Low | Not Rated |
| Lake Morris Erosion Control Site 5 Lucas County | 31 | 1972 | Low | Not Rated |
| Lake Morris Erosion Control Site 7 Lucas County | 35 | 1972 | Low | Not Rated |
| Lake Morris Erosion Control Site 8 Lucas County | 21 | 1972 | Low | Not Rated |
| Lake Morris Wetland Dam Site 1 Lucas County | 7 | 1998 | Low | Not Rated |
| Lake Oelwein Dam Fayette County | 16 | 1908 | Low | Not Rated |
| Lake of Three Fire Dredge Spoil Contianment Dam Taylor County | 35 | 2003 | Low | Not Rated |
| Lake Point Dam Dallas County | 20 | 1992 | Low | Not Rated |
| Lake Sugema Silt Control Dam Van Buren County | 26 | 1992 | Low | Not Rated |
| Lake Sugema Silt Dam Site C Van Buren County | 23 | 1994 | Low | Not Rated |
| Lakewood Dredge Spoil Dam Warren County | 30 | 1990 | Low | Not Rated |
| Lambert Dam Lucas County | 21 | 1999 | Low | Not Rated |
| Lamberts Dam Lucas County | 21 | 1997 | Low | Not Rated |
| Lange Dam Madison County | 33 | 2021 | Low | Not Rated |
| Langenfeld - Heiden Dam Crawford County | 44 | 2000 | Low | Not Rated |
| Langenfield/Kolln Dam Crawford County | 32 | 1975 | Low | Not Rated |
| Langerak Dam Marion County | 32 | 1986 | Low | Not Rated |
| Lankelma Dam Marion County | 31 | 1990 | Low | Not Rated |
| Lanning Dam Dallas County | 29 | 1988 | Low | Not Rated |
| Lannom Dam Poweshiek County | 30 | 1990 | Low | Not Rated |
| Lansink Dam Ida County | 21 | 2008 | Low | Not Rated |
Data sourced from the National Inventory of Dams (NID). Hazard classification reflects potential consequences of failure, not the likelihood of failure.