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 151–175 of 421
| Dam Name | Height (ft) | Year | Hazard | Condition |
|---|---|---|---|---|
| North Broadway Low Head Dam Franklin County | 6 | 1969 | Significant | Fair |
| Noe Lake Dam Brown County | 27 | 1971 | Low | Fair |
| New Waterstone Lake Dam Hamilton County | 19 | 1997 | Significant | Fair |
| New Washington Wwt Lagoon Crawford County | 13 | 2000 | Significant | Fair |
| New Vienna Wastewater Treatment Lagoons Clinton County | 14 | 1987 | Significant | Fair |
| Newton Falls Low Head Dam Trumbull County | 17 | 1908 | Significant | Fair |
| 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 |
| 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 Lower Fly Ash Dam Washington County | 75 | 1968 | High | Fair |
| 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 |
| Munroe Falls Park Lake Dam Summit County | 26 | 1937 | Low | Fair |
| Moore Lake Dam Coshocton County | 16 | 1975 | Low | Fair |
| Mont-Mere Lake Dam Geauga County | 28 | 1969 | High | Fair |
| Montezuma/Club Island Wwt Lagoons Mercer County | 17 | 1985 | Significant | Fair |
| Montezuma Club Island Wwt Lagoon Cell 4 Mercer County | 17 | 2012 | Significant | Fair |
| Monroeville Upground Reservoir Huron County | 17 | 2000 | Significant | Fair |
| Monroe Lake Dam Monroe County | 58 | 1956 | High | Fair |
| Mirror Lake Dam Licking County | 17 | — | Low | Fair |
Data sourced from the National Inventory of Dams (NID). Hazard classification reflects potential consequences of failure, not the likelihood of failure.