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 1876–1900 of 3,759
| Dam Name | Height (ft) | Year | Hazard | Condition |
|---|---|---|---|---|
| Luers Dam Washington County | 28 | 1996 | Low | Not Rated |
| Lum Hollow Subwatershed 12-10865 Woodbury County | 27 | 1959 | Low | Not Rated |
| Lum Hollow Subwatershed 6-5495 Woodbury County | 43 | 1959 | Low | Not Rated |
| Lum Hollow Subwatershed 7-2982 Woodbury County | 27 | 1959 | Low | Not Rated |
| Lum Hollow Subwatershed 9-10651 Woodbury County | 25 | 1959 | Low | Not Rated |
| Lum Hollow Subwatershed 9-3544 Woodbury County | 47 | 1959 | Low | Not Rated |
| Lum Hollow Subwatershed 9-5186 Woodbury County | 40 | 1959 | Low | Not Rated |
| Lum Hollow Subwatershed 9-7697 Woodbury County | 31 | 1959 | Low | Not Rated |
| Lum Hollow Subwatershed 9c-3295 Woodbury County | 35 | 1959 | Low | Not Rated |
| Lum Hollow Subwatershed M-13210 Woodbury County | 26 | 1959 | Low | Not Rated |
| Lum Hollow Subwatershed M-17850 Woodbury County | 36 | 1959 | Low | Not Rated |
| Lum Hollow Subwatershed M-22453 Woodbury County | 44 | 1959 | Low | Not Rated |
| Lum Hollow Subwatershed M-27785 Woodbury County | 38 | 1959 | Low | Not Rated |
| Lum Hollow Subwatershed M-3847 Woodbury County | 55 | 1959 | Low | Not Rated |
| Lum Hollow Subwatershed M-6199 Woodbury County | 39 | 1959 | Low | Not Rated |
| Lum Hollow Subwatershed M-8552 Woodbury County | 31 | 1959 | Low | Not Rated |
| Lundberg Dam Montgomery County | 31 | 1967 | Low | Not Rated |
| Lundell Dam Cherokee County | 34 | 1999 | Low | Not Rated |
| Lundquist Dam Cherokee County | 32 | 1959 | Low | Not Rated |
| Lundquist Dam Cherokee County | 37 | 1995 | Low | Not Rated |
| Lutz Dam Clarke County | 26 | 1967 | Low | Not Rated |
| Lylah Marsh Dam Howard County | 11 | 1960 | Low | Not Rated |
| Lynch Dam Davis County | 22 | 2013 | Low | Not Rated |
| Lynn Dam Fremont County | 29 | 1966 | Low | Not Rated |
| Lynnville Dam Jasper County | 12 | 1918 | Low | Not Rated |
Data sourced from the National Inventory of Dams (NID). Hazard classification reflects potential consequences of failure, not the likelihood of failure.