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 1251–1275 of 1,377
| Dam Name | Height (ft) | Year | Hazard | Condition |
|---|---|---|---|---|
| Bowling Green Upground Res & Sludge Lgns Wood County | 22 | 1989 | High | Satisfactory |
| Bowers Lake Estate Dam Jefferson County | 15 | 1960 | Significant | Poor |
| Boreman Lake Dam Wayne County | 19 | 1971 | Low | Fair |
| Bolivar Dam Stark County | 87 | 1938 | High | Not Available |
| Boka Woods Lake No. 1 Dam Fairfield County | 26 | 1965 | Significant | Poor |
| Blue Rock Lake Dam Muskingum County | 31 | 1937 | High | Satisfactory |
| Blue Heron Lake No. 5 Dam Medina County | 19 | — | High | Fair |
| Blue Heron Lake No. 1 Dam Medina County | 28 | — | High | Fair |
| Bloomingdale South Lake Dam Jefferson County | 19 | — | Low | Poor |
| Bloomingdale North Lake Dam Jefferson County | 33 | 1975 | Significant | Poor |
| Blend Lake Dam Stark County | 23 | — | Significant | Fair |
| Blanchester Res No. 6 Dam Clinton County | 24 | 2003 | High | Fair |
| Blanchester Reservoirs No. 1 & 2 Dam Clinton County | 10 | 1924 | Significant | Fair |
| Blanchester Reservoir No. 5 Dam Clinton County | 14 | 1970 | Significant | Fair |
| Blanchester Reservoir No. 4 Dam Clinton County | 16 | 1950 | High | Unsatisfactory |
| Blanchester Reservoir No. 3 Dam Clinton County | 15 | 1934 | High | Poor |
| Blacklidge Lake Dam Logan County | 27 | 1972 | Significant | Fair |
| Bilinovich Recreation Area Lake Dam Summit County | 28 | 1963 | Low | Poor |
| Bilinovich Lake Dam Guernsey County | 57 | 1992 | Significant | Poor |
| Big T Ranch Lake Dam Ashland County | 25 | 1963 | Low | Fair |
| Big Rock Lake Dam Columbiana County | 32 | 1963 | Low | Fair |
| Big Pine Lake Dam Crawford County | 28 | 1959 | Low | Poor |
| Big Island Wetland Dam Marion County | 9 | 1995 | Significant | Poor |
| Big Bear Lake Dam Scioto County | 37 | 1972 | High | Poor |
| Big Bass Lake Dam Huron County | 31 | 1965 | Low | Fair |
Data sourced from the National Inventory of Dams (NID). Hazard classification reflects potential consequences of failure, not the likelihood of failure.