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 226–250 of 501
| Dam Name | Height (ft) | Year | Hazard | Condition |
|---|---|---|---|---|
| Lake Wapusun Dam Wayne County | 34 | 1969 | Significant | Poor |
| Lake Viering Dam Knox County | 47 | 1964 | High | Poor |
| Lake Valhalla Dam Preble County | 26 | 1970 | Low | Poor |
| Lake Tomahawk Dam Columbiana County | 62 | 1966 | High | Poor |
| Lake Sylvan Dam Clark County | 21 | 1947 | Significant | Poor |
| Lake Sue Dam Williams County | 23 | — | Significant | Poor |
| Lake Silverstone Dam No. I Ashland County | 18 | 1955 | Low | Poor |
| Lake Seneca Dam Williams County | 36 | 1966 | High | Poor |
| Lake Rupert Dam Vinton County | 40 | 1968 | High | Poor |
| Lake Rockwell Dam Portage County | 35 | 1913 | High | Poor |
| Lake P'Na Dam Columbiana County | 17 | 1948 | Significant | Poor |
| Lake Park Dam Mahoning County | 12 | 1900 | Low | Poor |
| Lake Otto Dam Licking County | 25 | 1959 | Significant | Poor |
| Lake Mosier Upground Reservoir Hancock County | 25 | 1941 | High | Poor |
| Lake Mohawk Dam Carroll County | 42 | 1963 | High | Poor |
| Lake Milton Dam Mahoning County | 53 | 1916 | High | Poor |
| Lake Maria Dam Richland County | 40 | 1958 | Significant | Poor |
| Lake Lucerne Dam Geauga County | 30 | 1922 | High | Poor |
| Lake Lucern Dam Stark County | 10 | 1927 | Significant | Poor |
| Lake Louise Dam Geauga County | 25 | — | Significant | Poor |
| Lake Loretta Dam Fairfield County | 35 | — | Significant | Poor |
| Lake Loramie Dam Shelby County | 23 | 1844 | High | Poor |
| Lake Logan Dam Hocking County | 43 | 1954 | High | Poor |
| Lake Lamberjack Upground Reservoir Hancock County | 19 | 1919 | High | Poor |
| Lake Lakengren Dam Preble County | 74 | 1970 | High | Poor |
Data sourced from the National Inventory of Dams (NID). Hazard classification reflects potential consequences of failure, not the likelihood of failure.