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 626–650 of 4,124
| Dam Name | Height (ft) | Year | Hazard | Condition |
|---|---|---|---|---|
| Cottonwood-Green Valley Subws 50+40 #2 Monona County | 38 | 1966 | Low | Not Rated |
| Cottonwood-Green Valley Subws 75+70 #2 Monona County | 26 | 1966 | Low | Not Rated |
| Cottonwood-Green Valley Subws 99+50 #2 Monona County | 26 | 1966 | Low | Not Rated |
| Cottonwood-Green Valley Subws Sta 14+10 Monona County | 32 | 1966 | Low | Not Rated |
| Country Club Business Park Dam Dallas County | 18 | 1989 | Significant | Fair |
| County Basin Dam Guthrie County | 104 | 2006 | Significant | Satisfactory |
| Courcier Dam Montgomery County | 30 | 1971 | Low | Not Rated |
| Courtney Dam Boone County | 29 | 1966 | Low | Not Rated |
| Covered Bridge Estates Dam Madison County | 47 | 2005 | High | Satisfactory |
| Cowles Dam Decatur County | 31 | 1991 | Low | Not Rated |
| Cowles Dam Monroe County | 25 | 1989 | Low | Not Rated |
| Cozad Dam Clarke County | 27 | 1994 | Low | Not Rated |
| Cozad Dam Adair County | 24 | 1989 | Low | Not Rated |
| Cozad Dam Clarke County | 36 | 1959 | Low | Not Rated |
| Crab Tree Lake Dam Marshall County | 33 | 1948 | Significant | Satisfactory |
| Crain Dam Ringgold County | 27 | 2006 | Low | Not Rated |
| Crall Dam Monroe County | 28 | 1991 | Low | Not Rated |
| Cramer Dam Madison County | 32 | 1985 | Low | Not Rated |
| Cramer Farms Dam Union County | 31 | 1976 | Low | Not Rated |
| Crane Dam Davis County | 29 | 2000 | Low | Not Rated |
| Crane Dam Davis County | 29 | 1995 | Low | Not Rated |
| Crane'S Pond Dam Henry County | 12 | 1989 | Significant | Satisfactory |
| Cranston Brothers Dam Ida County | 32 | 1977 | Low | Not Rated |
| Crawford CO Roadgrade Dam 34-84-39 Crawford County | 41 | 2002 | Low | Not Rated |
| Crawford County Roadgrade Dam 27-83-38 Crawford County | 39 | 2000 | Low | Not Rated |
Data sourced from the National Inventory of Dams (NID). Hazard classification reflects potential consequences of failure, not the likelihood of failure.