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 1–25 of 501
| Dam Name | Height (ft) | Year | Hazard | Condition |
|---|---|---|---|---|
| Acacia Country Club Lake Dam Cuyahoga County | 38 | — | Significant | Poor |
| Adams Lake Dam Adams County | 34 | 1947 | High | Poor |
| Altiers Lake Dam Perry County | 19 | 1949 | High | Poor |
| Amann Reservoir Dam Morrow County | 32 | 1904 | Significant | Poor |
| Amann Reservoir Upper Dam Morrow County | 22 | 1964 | Significant | Poor |
| Amick Upground Reservoir Morrow County | 40 | 1968 | High | Poor |
| Anderson Lake Dam Franklin County | 25 | 1961 | Significant | Poor |
| Apple Valley Lake Dam Knox County | 91 | 1971 | High | Poor |
| Archbold Upground Reservoir No. 1 Fulton County | 15 | 1957 | High | Poor |
| Archbold Upground Reservoir No. 2 Fulton County | 22 | 1961 | High | Poor |
| Artesian Lake Dam Ashland County | 18 | — | High | Poor |
| Ashley Waterworks Reservoir Delaware County | 12 | 1954 | Significant | Poor |
| Ashtabula County Outdoor Club Lake Dam Ashtabula County | 22 | 1928 | High | Poor |
| Attica Upground Reservoir Seneca County | 14 | 1955 | Significant | Poor |
| Bader Lake Dam Licking County | 22 | 1961 | Significant | Poor |
| Baker Lake Dam Monroe County | 37 | — | Significant | Poor |
| Baker Lake Dam Medina County | 13 | — | Undetermined | Poor |
| Baker Pond Dam Monroe County | 25 | — | Significant | Poor |
| Barnesville Lake Dam Belmont County | 32 | 1969 | High | Poor |
| Barnesville Reservoir No. 2 Dam Belmont County | 48 | 1936 | High | Poor |
| Barnesville Reservoir No. 3 Dam Belmont County | 77 | 1965 | High | Poor |
| Bash Lake Dam Ashland County | 22 | 1962 | Low | Poor |
| Basin `A' Hamilton County | 50 | 1976 | Significant | Poor |
| Basin `B' Hamilton County | 50 | 1981 | Significant | Poor |
| Bass Lake Dam Lake County | 20 | 1966 | Significant | Poor |
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Data sourced from the National Inventory of Dams (NID). Hazard classification reflects potential consequences of failure, not the likelihood of failure.