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 501–525 of 1,377
| Dam Name | Height (ft) | Year | Hazard | Condition |
|---|---|---|---|---|
| Newfields Development Lake Dam Montgomery County | 14 | 1973 | High | Fair |
| New Concord Village Reservoir Dam Muskingum County | 42 | 1955 | Significant | Fair |
| Newbridge Farms Pond Dam Warren County | 40 | — | Low | Fair |
| Newark Low Head Dam Licking County | 22 | 1960 | Significant | Fair |
| Neutralized Water Impoundment 3 Knox County | 20 | 1997 | Significant | Fair |
| Neutralized Water Impoundment 2 Knox County | 22 | 1989 | Significant | Fair |
| Nettle Lake Wwtp Lagoons Williams County | 11 | 1996 | Significant | Satisfactory |
| Nesbitt Pond Dam Athens County | 29 | 1953 | High | Satisfactory |
| Naji Lake Dam Ashtabula County | 19 | 1963 | High | Poor |
| Naco Lake Dam Jefferson County | 40 | 1958 | Significant | Satisfactory |
| Mystic Lake Dam Greene County | 12 | 1950 | Low | Poor |
| Myers Pond Dam Belmont County | 28 | 1966 | Low | Poor |
| Muskingum Valley Council Lake Dam Coshocton County | 25 | 1974 | Low | Fair |
| 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 River Lock and Dam No. 9 Muskingum County | 18 | 1841 | Significant | Poor |
| Muskingum River Lock and Dam No. 8 Morgan County | 20 | 1841 | Significant | Poor |
| Muskingum River Lock and Dam No. 7 Morgan County | 15 | 1841 | Significant | Poor |
| Muskingum River Lock and Dam No. 5 Washington County | 20 | 1841 | Significant | Poor |
| Muskingum River Lock and Dam No. 4 Washington County | 17 | 1841 | Significant | Poor |
| Muskingum River Lock and Dam No. 3 Washington County | 18 | 1841 | Significant | Poor |
| Muskingum River Lock and Dam No. 2 Washington County | 18 | 1841 | Significant | Fair |
| Muskingum River Lock and Dam No. 11 Muskingum County | 15 | 1841 | Significant | Fair |
| Muskingum River Lock and Dam No. 10 Muskingum County | 12 | 1841 | Significant | Poor |
Data sourced from the National Inventory of Dams (NID). Hazard classification reflects potential consequences of failure, not the likelihood of failure.