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 501–525 of 4,124
| Dam Name | Height (ft) | Year | Hazard | Condition |
|---|---|---|---|---|
| Carlson/Walsh Dam Pottawattamie County | 45 | 1969 | Low | Not Rated |
| Carpenter Dam Warren County | 48 | 1977 | Low | Not Rated |
| Carrier Dam Lee County | 35 | 1974 | Low | Not Rated |
| Carroll Stormwater Detention Dam Carroll County | 13 | 1985 | High | Satisfactory |
| Carson Dam Cherokee County | 32 | 1977 | Low | Not Rated |
| Carson Dam Clarke County | 26 | 1979 | Low | Not Rated |
| Carson Dam Johnson County | 27 | 1978 | Low | Not Rated |
| Carstens & Stover Dam Crawford County | 38 | 1971 | Low | Not Rated |
| Carter Dam Iowa County | 28 | 1971 | Low | Not Rated |
| Carter Dam Madison County | 36 | 1993 | Low | Not Rated |
| Carter Dam Jefferson County | 28 | 1967 | Low | Not Rated |
| Carter Dam Des Moines County | 31 | 1986 | Low | Not Rated |
| Carter Road Stormwater Detention Dam Dubuque County | 41 | 2004 | High | Fair |
| Carver Dam Story County | 26 | 1991 | Low | Not Rated |
| Case Dam Adams County | 25 | 2000 | Low | Not Rated |
| Casey Mill and Elevator Ia-57-148 Guthrie County | 23 | 1974 | Low | Not Rated |
| Casper Reclamation Dam Madison County | 42 | 1998 | Low | Not Rated |
| Cassens Dam Keokuk County | 29 | 1982 | Low | Not Rated |
| Cedar Creek Dam Madison County | 50 | 1939 | Significant | Satisfactory |
| Cedar Falls Milldam Black Hawk County | 12 | 1939 | Low | Not Rated |
| Cedar Lake Dam Linn County | 15 | — | Low | Not Rated |
| Cedar Rapids Milldam (5 In 1) Linn County | 16 | 1978 | Significant | Satisfactory |
| Cedar Rapids Milldam Iel&P Linn County | 8 | 1967 | Low | Not Rated |
| Center Lake Dam Allamakee County | 32 | 1982 | Low | Not Rated |
| Center Lake Outlet Control Structure Dickinson County | 7 | 2009 | Low | Not Rated |
Data sourced from the National Inventory of Dams (NID). Hazard classification reflects potential consequences of failure, not the likelihood of failure.