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 1801–1825 of 3,759
| Dam Name | Height (ft) | Year | Hazard | Condition |
|---|---|---|---|---|
| Lewis Dam Poweshiek County | 25 | 1963 | Low | Not Rated |
| Lewis Dam Fremont County | 27 | 2002 | Low | Not Rated |
| Lidtke Mill Dam Howard County | 12 | 1860 | Low | Not Rated |
| Lienemann Dam Dallas County | 31 | 1980 | Low | Not Rated |
| Lienemann Dam Madison County | 32 | 1966 | Low | Not Rated |
| Liike Brothers Dam Marion County | 34 | 1976 | Low | Not Rated |
| Liken Family Farm Dam Union County | 25 | 1986 | Low | Not Rated |
| Lincoln Acres Dam Warren County | 37 | — | Low | Not Rated |
| Lincoln Dam Crawford County | 36 | 2004 | Low | Not Rated |
| Lindberg Dam Wapello County | 38 | 2001 | Low | Not Rated |
| Lindberg/Johnson Dam Sac County | 36 | 1979 | Low | Not Rated |
| Lindgren Dam #3 Ida County | 34 | 1998 | Low | Not Rated |
| Lindle Dam Muscatine County | 26 | 1994 | Low | Not Rated |
| Lindsay Dam Warren County | 25 | 1987 | Low | Not Rated |
| Lineville Reservoir Dam Wayne County | 21 | 1900 | Low | Not Rated |
| Lingren Dam #3 Ida County | 32 | 2002 | Low | Not Rated |
| Liniger Dam Taylor County | 26 | 1997 | Low | Not Rated |
| Linn Dam Adair County | 27 | 1974 | Low | Not Rated |
| Linn Grove Milldam Buena Vista County | 9 | 1924 | Low | Not Rated |
| Lint Dam Van Buren County | 27 | 1996 | Low | Not Rated |
| Little Beaver Subwatershed 2-13001 Woodbury County | 27 | 1957 | Low | Not Rated |
| Little Beaver Subwatershed 2-15127 Woodbury County | 34 | 1957 | Low | Not Rated |
| Little Beaver Subwatershed 5-8154 Woodbury County | 36 | 1957 | Low | Not Rated |
| Little Beaver Subwatershed 5b-5000 Woodbury County | 36 | 1957 | Low | Not Rated |
| Little Beaver Subwatershed M-10001 Woodbury County | 38 | 1957 | Low | Not Rated |
Data sourced from the National Inventory of Dams (NID). Hazard classification reflects potential consequences of failure, not the likelihood of failure.