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 2801–2825 of 3,759
| Dam Name | Height (ft) | Year | Hazard | Condition |
|---|---|---|---|---|
| Elkader Milldam Clayton County | 16 | 1926 | Low | Not Rated |
| Elias Dam Harrison County | 36 | 1955 | Low | Not Rated |
| Elfrink Wetland Dam #2 Van Buren County | 10 | 1994 | Low | Not Rated |
| Elfrink Wetland Dam #1 Van Buren County | 8 | 1994 | Low | Not Rated |
| Eldred Sherwood Park Lake Dam Hancock County | 33 | 1967 | Low | Not Rated |
| Einwalter Dam Winneshiek County | 9 | 2023 | Low | Not Rated |
| Eichelberger Dam Washington County | 27 | 1996 | Low | Not Rated |
| E&H Farms Dam Jefferson County | 34 | 1988 | Low | Not Rated |
| Edward Schnurr Dam Decatur County | 33 | 2019 | Low | Not Rated |
| Edel Dam Mahaska County | 22 | 1975 | Low | Not Rated |
| Eddy Dam Appanoose County | 33 | 1991 | Low | Not Rated |
| Eblen Dam Cass County | 25 | 1972 | Low | Not Rated |
| Eblen Dam Cass County | 32 | 1960 | Low | Not Rated |
| Ebbers Dam Wayne County | 26 | 2000 | Low | Not Rated |
| East Waterman Creek Subwatershed 2425 O'Brien County | 37 | 1960 | Low | Not Rated |
| East Fork of Grand River Watershed Site D-28 Ringgold County | 24 | 2008 | Low | Not Rated |
| East Fork of Grand River Watershed Site A-93 Ringgold County | 23 | 2008 | Low | Not Rated |
| East Fork Grand River Wtaershed Site D-71 Ringgold County | 23 | 2002 | Low | Not Rated |
| East Fork Grand River Watershed Site E58b Ringgold County | 30 | 2010 | Low | Not Rated |
| East Fork Grand River Watershed Site E-54 Ringgold County | 31 | 2006 | Low | Not Rated |
| East Fork Grand River Watershed Site E-52 Ringgold County | 32 | 2006 | Low | Not Rated |
| East Fork Grand River Watershed Site E-51 Ringgold County | 30 | 2006 | Low | Not Rated |
| East Fork Grand River Watershed Site E-49 Ringgold County | 31 | 2010 | Low | Not Rated |
| East Fork Grand River Watershed Site E-44 Ringgold County | 26 | 2006 | Low | Not Rated |
| East Fork Grand River Watershed Site E-43 Ringgold County | 26 | 2006 | Low | Not Rated |
Data sourced from the National Inventory of Dams (NID). Hazard classification reflects potential consequences of failure, not the likelihood of failure.