Ohio Dams
1,377 dams tracked by the National Inventory of Dams
Total Dams
1,377
High Hazard
397
28.8%
Poor / Unsatisfactory
509
Average Age
65 yrs
Hazard Classification
High397 (28.8%)
Significant564 (41.0%)
Low339 (24.6%)
Condition Assessment
Satisfactory324 (23.5%)
Fair421 (30.6%)
Poor / Unsatisfactory509 (37.0%)
Not Rated123 (8.9%)
Federal
39
State
115
Local
356
Private
753
Tallest Dams
High Hazard Dams
Poor Condition Dams
All Dams in Ohio
Showing 401–425 of 501
| Dam Name | Height (ft) | Year | Hazard | Condition |
|---|---|---|---|---|
| Crystal Lake Dam Ashtabula County | 11 | 1930 | Low | Poor |
| Crystal Lake Dam Stark County | 10 | 1955 | Significant | Poor |
| Crouse Pond Dam Summit County | 12 | — | Significant | Poor |
| Cowan Lake Dam Clinton County | 63 | 1947 | High | Poor |
| Cooper Valley LLC Dam Jefferson County | 42 | 1963 | Significant | Poor |
| Cooper Pond Dam Stark County | 24 | 1971 | Low | Poor |
| Cooke Pond No. 2 Dam Richland County | 13 | 1968 | Significant | Poor |
| Cooke Pond No. 1 Dam Richland County | 17 | 1964 | Significant | Poor |
| Conesville Plant Ash Pond Complex Coshocton County | 35 | — | Significant | Poor |
| Comstock Pond Dam Morgan County | 22 | 1962 | Low | Poor |
| Comet Lake Dam Summit County | 26 | 1922 | High | Poor |
| Columbus Southern Power Company Dam Ma-11 Muskingum County | 25 | — | Low | Poor |
| Columbia Lake Dam Summit County | 17 | 1914 | Significant | Poor |
| College Corner Upground Reservoir No. 2 Preble County | 14 | 1965 | Significant | Poor |
| Coalburg Lake Dam Trumbull County | 24 | 1916 | High | Poor |
| Clear Fork Reservoir Dam Richland County | 44 | 1949 | High | Poor |
| Clear Creek Lake Dam Shelby County | 21 | — | Low | Poor |
| Clay'S Park Lake Dam Stark County | 15 | 1955 | Low | Poor |
| Classicway Farm Lake Dam Warren County | 18 | — | Low | Poor |
| Classicway Farm Lake Dam Warren County | 24 | 1965 | High | Poor |
| Clark Lake No. 2 Dam Pickaway County | 40 | — | Low | Poor |
| Clark Lake Dam Clark County | 23 | 1957 | High | Poor |
| Clare-Mar Camp Lake Dam Lorain County | 19 | — | Significant | Poor |
| Clapper Lake Dam Stark County | 17 | — | Significant | Poor |
| City of Cambridge Park Dam Guernsey County | 16 | — | Significant | Poor |
Data sourced from the National Inventory of Dams (NID). Hazard classification reflects potential consequences of failure, not the likelihood of failure.