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 1976–2000 of 3,759
| Dam Name | Height (ft) | Year | Hazard | Condition |
|---|---|---|---|---|
| Leech Hollow Subwatershed Site C-6 Monona County | 40 | 1970 | Low | Not Rated |
| Leech Hollow Subwatershed Site C-5 Monona County | 51 | 1978 | Low | Not Rated |
| Leech Hollow Subwatershed Site C-2 Monona County | 56 | 1978 | Low | Not Rated |
| Leech Hollow Subwatershed Site C-12 Monona County | 52 | 1978 | Low | Not Rated |
| Leech Hollow Subwatershed Site C-11 Monona County | 40 | 1978 | Low | Not Rated |
| Ledgewood Creek Watershed Site M-5 Fremont County | 38 | 1973 | Low | Not Rated |
| Ledgewood Creek Watershed Site M-3 Fremont County | 37 | 1973 | Low | Not Rated |
| Ledgewood Creek Watershed Site M-2 Fremont County | 39 | 1973 | Low | Not Rated |
| Ledgewood Creek Watershed Site 9-4 Fremont County | 44 | 1973 | Low | Not Rated |
| Ledgewood Creek Watershed Site 9-3 Fremont County | 26 | 1973 | Low | Not Rated |
| Ledgewood Creek Watershed Site 9-2 Fremont County | 35 | 1973 | Low | Not Rated |
| Ledgewood Creek Watershed Site 8-1 Fremont County | 33 | 1973 | Low | Not Rated |
| Ledgewood Creek Watershed Site 2-4 Fremont County | 27 | 1973 | Low | Not Rated |
| Ledgewood Creek Watershed Site 2-1 Fremont County | 39 | 1973 | Low | Not Rated |
| Leckband Dam Osceola County | 36 | 1983 | Low | Not Rated |
| Lechtenberg Dam Jackson County | 23 | 1999 | Low | Not Rated |
| Lazy K Dam Crawford County | 30 | 1972 | Low | Not Rated |
| Lazy Daz Dam Appanoose County | 43 | 1974 | Low | Not Rated |
| Lawyer Dam Warren County | 29 | 1995 | Low | Not Rated |
| Lawson Subwatershed Site 3-1 Monona County | 30 | 1968 | Low | Not Rated |
| Lawson Subwatershed Site 2-2 Monona County | 45 | 1968 | Low | Not Rated |
| Lawson Subwatershed Site 2-1 Monona County | 26 | 1968 | Low | Not Rated |
| Lawson Subwatershed Site 1-1 Monona County | 39 | 1968 | Low | Not Rated |
| Laverty Dam Warren County | 28 | 1967 | Low | Not Rated |
| Lautner Dam Greene County | 35 | 2004 | Low | Not Rated |
Data sourced from the National Inventory of Dams (NID). Hazard classification reflects potential consequences of failure, not the likelihood of failure.