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 476–500 of 564
| Dam Name | Height (ft) | Year | Hazard | Condition |
|---|---|---|---|---|
| South Vienna Wwt Lagoons Clark County | 26 | 1992 | Significant | Fair |
| Spencer Lake - South Dam Medina County | 17 | 1960 | Significant | Fair |
| Springwater Park Lake Dam Portage County | 22 | 1945 | Significant | Poor |
| Sproat Lake Dam Vinton County | 35 | 1962 | Significant | Fair |
| Stanley Lower Lake Dam Carroll County | 25 | 1933 | Significant | Poor |
| Stanley Upper Lake Dam Carroll County | 37 | 1933 | Significant | Poor |
| Stark Lime Sludge Lagoon Stark County | 34 | — | Significant | Poor |
| St. Henry Wwt Lagoon Mercer County | 27 | 1988 | Significant | Satisfactory |
| St. Marys Lime Sludge Lagoons Auglaize County | 13 | 1988 | Significant | Satisfactory |
| Stoneybrook Farm Lake Dam Warren County | 45 | 1968 | Significant | Fair |
| Stony Lake Dam Carroll County | 18 | 1928 | Significant | Poor |
| Strader Lake Dam Clermont County | 51 | 1954 | Significant | Poor |
| Strait'S Lake Dam Morrow County | 24 | 1965 | Significant | Fair |
| Stroman Lake Dam Champaign County | 38 | 1958 | Significant | Satisfactory |
| Summitcrest Farm Pond Dam Columbiana County | 39 | 1960 | Significant | Poor |
| Summitville Lake Dam Columbiana County | 26 | 1940 | Significant | Poor |
| Sunnyhill Freshwater Reservoir Dam Perry County | 45 | 1959 | Significant | Poor |
| Sunset Lake Dam Medina County | 17 | — | Significant | Satisfactory |
| Sunshine Lakes Dam Columbiana County | 38 | — | Significant | Poor |
| Swanton Upground Reservoir Lucas County | 24 | 1937 | Significant | Fair |
| Swift Run Lake Dam Miami County | 39 | 1876 | Significant | Poor |
| Switzerland Lake Dam Belmont County | 54 | 1956 | Significant | Fair |
| Tanager Woods Lake Dam Hamilton County | 19 | — | Significant | Poor |
| Tara Lake Dam Greene County | 20 | 1969 | Significant | Poor |
| Taylor Lake Dam Logan County | 23 | 1972 | Significant | Fair |
Data sourced from the National Inventory of Dams (NID). Hazard classification reflects potential consequences of failure, not the likelihood of failure.