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 126–150 of 397
| Dam Name | Height (ft) | Year | Hazard | Condition |
|---|---|---|---|---|
| Paint Creek Dam - Greenfield Levee Ross County | 43 | 1973 | High | Not Available |
| Ottawa Upground Reservoir Putnam County | 22 | 1972 | High | Fair |
| O'Shaughnessy Delaware County | 79 | 1924 | High | Satisfactory |
| Old Man'S Cave Lake Dam Hocking County | 64 | 1972 | High | Poor |
| Oberlin Upground Reservoir Lorain County | 20 | 1960 | High | Fair |
| Norwalk Upper Reservoir Huron County | 39 | 1896 | High | Satisfactory |
| Norwalk Memorial Reservoir Huron County | 54 | 1954 | High | Fair |
| Norwalk Lower Reservoir Huron County | 34 | 1896 | High | Satisfactory |
| North Reservoir Dam Summit County | 13 | 1840 | High | Poor |
| North Branch Kokosing Dam Knox County | 71 | 1972 | High | Not Available |
| North Baltimore Ug Res No. 1 & 2 Wood County | 24 | 1969 | High | Satisfactory |
| No. 2 Slurry Pond Belmont County | 300 | — | High | Not Available |
| Nimisila Reservoir Dam Summit County | 44 | 1936 | High | Poor |
| New London Reservoir Huron County | 39 | 1975 | High | Satisfactory |
| New Lexington Reservoir Dam Perry County | 45 | 1936 | High | Poor |
| Newfields Development Lake Dam Montgomery County | 14 | 1973 | High | Fair |
| Nesbitt Pond Dam Athens County | 29 | 1953 | High | Satisfactory |
| Naji Lake Dam Ashtabula County | 19 | 1963 | High | Poor |
| Muskingum River Upper Fly Ash Dam Washington County | 152 | 1975 | High | Fair |
| Muskingum River Middle Fly Ash Dam Washington County | 100 | 1968 | High | Satisfactory |
| Muskingum River Lower Fly Ash Dam Washington County | 75 | 1968 | High | Fair |
| Muskingum College Lake Dam Muskingum County | 28 | 1935 | High | Poor |
| Mount Orab Upground Reservoir No. 2 Brown County | 31 | 1974 | High | Satisfactory |
| Mount Gilead Lower Lake Dam Morrow County | 33 | 2018 | High | Satisfactory |
| Mosquito Creek Dam Trumbull County | 47 | 1944 | High | Not Available |
Data sourced from the National Inventory of Dams (NID). Hazard classification reflects potential consequences of failure, not the likelihood of failure.