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 701–725 of 1,377
| Dam Name | Height (ft) | Year | Hazard | Condition |
|---|---|---|---|---|
| Lake Timberlin Richland County | 31 | 1969 | Low | Fair |
| Lake Tomahawk Dam Columbiana County | 62 | 1966 | High | Poor |
| Lake Tomahawk Dam Hocking County | 36 | 1962 | Low | Satisfactory |
| Lake Valhalla Dam Preble County | 26 | 1970 | Low | Poor |
| Lake Viering Dam Knox County | 47 | 1964 | High | Poor |
| Lakeview Cemetery Flood Control Dam Cuyahoga County | 89 | 1978 | High | Fair |
| Lakeview Dam Muskingum County | 15 | 1959 | Significant | Fair |
| Lakeview Lake Dam Knox County | 23 | — | Undetermined | Not Rated |
| Lake Wapusun Dam Wayne County | 34 | 1969 | Significant | Poor |
| Lake Waynoka Dam Brown County | 53 | 1973 | High | Satisfactory |
| Lake Waynoka Retention Dam Brown County | 32 | 1973 | Significant | Satisfactory |
| Lake Waynoka Upground Reservoir Brown County | 23 | 1973 | Significant | Satisfactory |
| Lake White Dam Pike County | 39 | 1935 | High | Fair |
| Lake Wohelo Dam Carroll County | 15 | — | Low | Poor |
| Lakota Lake Dam Butler County | 58 | 1960 | Significant | Poor |
| Lambert Lake Dam Geauga County | 14 | 1992 | Undetermined | Fair |
| Lamborn No. 3 Dam Harrison County | 35 | 1968 | Low | Fair |
| Lamborn No. 4 Dam Harrison County | 39 | 1968 | Low | Satisfactory |
| Lamping Dam Monroe County | 27 | 1967 | Significant | Not Rated |
| Landen Farm Lake Dam Warren County | 40 | 1975 | High | Satisfactory |
| Lang Lake Dam Fairfield County | 19 | 1965 | Low | Poor |
| Larrick Lake Dam Guernsey County | 35 | 1981 | Low | Poor |
| Larue Wastewater Treatment Lagoon Marion County | 10 | 2001 | Significant | Satisfactory |
| Laurel Lake Dam Morrow County | 20 | 1955 | Significant | Poor |
| Lawco Lake Dam Lawrence County | 17 | 1931 | Low | Satisfactory |
Data sourced from the National Inventory of Dams (NID). Hazard classification reflects potential consequences of failure, not the likelihood of failure.