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 1851–1875 of 3,759
| Dam Name | Height (ft) | Year | Hazard | Condition |
|---|---|---|---|---|
| Logan Dam Davis County | 31 | 1998 | Low | Not Rated |
| Logsdon Dam Lucas County | 19 | 1996 | Low | Not Rated |
| Long Dam Warren County | 41 | 1967 | Low | Not Rated |
| Longinaker Dam Fremont County | 27 | 1965 | Low | Not Rated |
| Lorenz Dam Henry County | 28 | 2012 | Low | Not Rated |
| Lorenzen Dam Clinton County | 33 | 1998 | Low | Not Rated |
| Louisa County Raodgrade Dam 36-73-3 Louisa County | 40 | 2002 | Low | Not Rated |
| Louisa County Roadgrade Dam 24-74-3 Louisa County | 28 | 1989 | Low | Not Rated |
| Lounsberry Dam Monona County | 35 | 1975 | Low | Not Rated |
| Lowary Dam Henry County | 26 | 2008 | Low | Not Rated |
| Lower Beaver Subwtrshd Sta 21+00 #2 Monona County | 43 | 1965 | Low | Not Rated |
| Lower Beaver Subwtrshd Sta 80+04 #7a Monona County | 26 | 1965 | Low | Not Rated |
| Lower Dunbar Dam Greene County | 7 | 1996 | Low | Not Rated |
| Lowery Dam Wayne County | 24 | 1982 | Low | Not Rated |
| Lowery/Egly Dam Wayne County | 24 | 1993 | Low | Not Rated |
| Ls Dennis Lindgren Ida County | 35 | 1995 | Low | Not Rated |
| Ls Janet Lindgren Ida County | 34 | 1998 | Low | Not Rated |
| Ls Miller 4-3375 Woodbury County | 32 | 1960 | Low | Not Rated |
| Lucas Co. Grade Stab. Lucas County | 26 | 1981 | Low | Not Rated |
| Lucas County Roadgrade Dam 14-71-21 Lucas County | 17 | 1968 | Low | Not Rated |
| Lucas County Roadgrade Dam 30-72-20 Lucas County | 30 | 1983 | Low | Not Rated |
| Lucas County Roadgrade Dam (L-1) Lucas County | 49 | 1989 | Low | Not Rated |
| Lucas County Roadgrade Dam (L-2) Lucas County | 44 | 1989 | Low | Not Rated |
| Ludvigson Dam Woodbury County | 28 | 1975 | Low | Not Rated |
| Ludwig Dam Warren County | 30 | 2002 | Low | Not Rated |
Data sourced from the National Inventory of Dams (NID). Hazard classification reflects potential consequences of failure, not the likelihood of failure.