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 3201–3225 of 3,759
| Dam Name | Height (ft) | Year | Hazard | Condition |
|---|---|---|---|---|
| Cottonwood-Green Valley Subws Sta 14+10 Monona County | 32 | 1966 | Low | Not Rated |
| Cottonwood-Green Valley Subws 99+50 #2 Monona County | 26 | 1966 | Low | Not Rated |
| Cottonwood-Green Valley Subws 75+70 #2 Monona County | 26 | 1966 | Low | Not Rated |
| Cottonwood-Green Valley Subws 50+40 #2 Monona County | 38 | 1966 | Low | Not Rated |
| Corrigan Dam Warren County | 28 | 2005 | Low | Not Rated |
| Corpman Dam Washington County | 28 | 2024 | Low | Not Rated |
| Corey Family Farms Dam Calhoun County | 33 | 2004 | Low | Not Rated |
| Cord Subwatershed M-7234 Woodbury County | 41 | 1957 | Low | Not Rated |
| Cord Subwatershed M-5571 Woodbury County | 36 | 1957 | Low | Not Rated |
| Cord Subwatershed M-10464 Woodbury County | 28 | 1957 | Low | Not Rated |
| Coralville Milldam Johnson County | 13 | 1880 | Low | Not Rated |
| Cope Dam Davis County | 22 | 2014 | Low | Not Rated |
| Cooper Dam Lucas County | 29 | 1994 | Low | Not Rated |
| Cooper Cove Park Dam Pocahontas County | 43 | 1972 | Low | Not Rated |
| Cook Dam Dallas County | 31 | 1965 | Low | Not Rated |
| Conte Dam Marshall County | 24 | 1970 | Low | Not Rated |
| Conner Dam Keokuk County | 37 | 1967 | Low | Not Rated |
| Conner Dam Keokuk County | 37 | 1979 | Low | Not Rated |
| Conley Dam 2 Cherokee County | 36 | 2002 | Low | Not Rated |
| Conley Dam Cherokee County | 29 | 2002 | Low | Not Rated |
| Conley Dam Cherokee County | 40 | 1997 | Low | Not Rated |
| Conley Dam Plymouth County | 28 | 1975 | Low | Not Rated |
| Commers Dam Montgomery County | 33 | 2023 | Low | Not Rated |
| Combs Dam Davis County | 22 | 1998 | Low | Not Rated |
| Combs Dam Poweshiek County | 23 | 1974 | Low | Not Rated |
Data sourced from the National Inventory of Dams (NID). Hazard classification reflects potential consequences of failure, not the likelihood of failure.