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 1826–1850 of 3,759
| Dam Name | Height (ft) | Year | Hazard | Condition |
|---|---|---|---|---|
| Little Beaver Subwatershed M-16730 Woodbury County | 40 | 1957 | Low | Not Rated |
| Little Egypt Subwatershed 4-2772 Woodbury County | 58 | 1961 | Low | Not Rated |
| Little Egypt Subwatershed 5-3052 Woodbury County | 44 | 1960 | Low | Not Rated |
| Little Egypt Subwatershed 5-4730 Woodbury County | 35 | 1961 | Low | Not Rated |
| Little Egypt Subwatershed 9-2670 Woodbury County | 46 | 1961 | Low | Not Rated |
| Little Egypt Subwatershed Sta 125+21 #M Woodbury County | 39 | 1961 | Low | Not Rated |
| Little Egypt Subwatershed Sta 174+75 #M Woodbury County | 27 | 1961 | Low | Not Rated |
| Little Egypt Subwatershed Sta 29+82 #M Woodbury County | 36 | 1961 | Low | Not Rated |
| Little Egypt Subwatershed Sta 62+38 #M Woodbury County | 38 | 1961 | Low | Not Rated |
| Littlefield Silt Control Dam Audubon County | 15 | 1987 | Low | Not Rated |
| Little Paint Creek Watershed Site 200 Allamakee County | 34 | 1999 | Low | Not Rated |
| Little Paint Creek Watershed Site 206a Allamakee County | 42 | 2005 | Low | Not Rated |
| Little River Watershed Site 58 Decatur County | 28 | 2006 | Low | Not Rated |
| Little River Watershed Site 65-1 Decatur County | 31 | 1980 | Low | Not Rated |
| Little River Watershed Site 65-2 Decatur County | 30 | 1980 | Low | Not Rated |
| Little Sioux Dam Harrison County | 7 | 1963 | Low | Not Rated |
| Little Sioux River Bedgrade Control Harrison County | 8 | 1985 | Low | Not Rated |
| Little Sioux Scout Ranch Dam Monona County | 46 | 1974 | Low | Not Rated |
| Littleton Dam Buchanan County | 9 | 1934 | Low | Not Rated |
| Little Whiskey Subwatershed Site 16-2 Woodbury County | 36 | 2001 | Low | Not Rated |
| Little Whiskey Subwatershed Site M-1 Woodbury County | 37 | 1984 | Low | Not Rated |
| Livingston Dam Taylor County | 31 | 1974 | Low | Not Rated |
| Loch Burns Dam Wapello County | 30 | 1963 | Low | Fair |
| Loewe Dam Fremont County | 27 | 1985 | Low | Not Rated |
| Logan Dam Davis County | 21 | 1999 | Low | Not Rated |
Data sourced from the National Inventory of Dams (NID). Hazard classification reflects potential consequences of failure, not the likelihood of failure.