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 2326–2350 of 3,759
| Dam Name | Height (ft) | Year | Hazard | Condition |
|---|---|---|---|---|
| Illum Dam Marshall County | 27 | 2002 | Low | Not Rated |
| Il & Ic Dam Jefferson County | 8 | 1992 | Low | Not Rated |
| Idot Wetland Dam Louisa County | 8 | 1994 | Low | Not Rated |
| Idot Roadgrade Dam 7-88-47 Woodbury County | 25 | 1979 | Low | Not Rated |
| Idot Roadgrade Dam 32-88-25 Hamilton County | 28 | 1977 | Low | Not Rated |
| Ida County Roadgrade Dam 04-85-41 Crawford County | 28 | 1961 | Low | Not Rated |
| Ibeling Dam Franklin County | 28 | 1985 | Low | Not Rated |
| Hynick Dam 2 Mahaska County | 28 | 1962 | Low | Not Rated |
| Hynick Dam Mahaska County | 29 | 1963 | Low | Not Rated |
| Hutchings Dam Davis County | 18 | 1994 | Low | Not Rated |
| Huseman Dam Madison County | 30 | 2002 | Low | Not Rated |
| Hurlburt Dam Kossuth County | 24 | 1975 | Low | Not Rated |
| Hunter Dam #2 Madison County | 19 | 2003 | Low | Not Rated |
| Hunter Dam Madison County | 16 | 1999 | Low | Not Rated |
| Hunter Dam Madison County | 23 | 2001 | Low | Not Rated |
| Hunter Dam Jasper County | 40 | 1978 | Low | Not Rated |
| Hunt Dam Delaware County | 26 | 2008 | Low | Not Rated |
| Hunt Club Farms Dam Tama County | 24 | 2021 | Low | Not Rated |
| Hunemiller Dam Butler County | 19 | 1997 | Low | Not Rated |
| Hundahl Dam Monona County | 30 | 1950 | Low | Not Rated |
| Humphrey/Sorenson Dam Audubon County | 22 | 1967 | Low | Not Rated |
| Hummel Dam Plymouth County | 43 | 1966 | Low | Not Rated |
| Humboldt Milldam Humboldt County | 13 | 1912 | Low | Not Rated |
| Hulme Dam Davis County | 33 | 1999 | Low | Not Rated |
| Hull Reclamation Site 5 Mahaska County | 26 | 1988 | Low | Not Rated |
Data sourced from the National Inventory of Dams (NID). Hazard classification reflects potential consequences of failure, not the likelihood of failure.