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 826–850 of 1,377
| Dam Name | Height (ft) | Year | Hazard | Condition |
|---|---|---|---|---|
| Miner Pond Dam Portage County | 24 | 1967 | Significant | Poor |
| Minerva Park Lake Dam Franklin County | 19 | 1890 | Low | Satisfactory |
| Mingo Sportsman Club Pond Dam Jefferson County | 49 | 1969 | Significant | Poor |
| Mirror Lake Dam Licking County | 17 | — | Low | Fair |
| Mirror Lake Dam Medina County | 26 | 1950 | Low | Fair |
| Modern Tool & Die Company Reservoir Dam Medina County | 31 | 1967 | Low | Poor |
| Moe Pond Dam Fairfield County | 19 | 1975 | Significant | Satisfactory |
| Mogadore Reservoir Dam Portage County | 36 | 1938 | High | Poor |
| Mohawk Dam Coshocton County | 111 | 1937 | High | Not Available |
| Mohawk Lake Dam Seneca County | 18 | 1913 | Significant | Satisfactory |
| Mohicanville Dam Ashland County | 46 | 1937 | High | Not Available |
| Moll Lake Dam Medina County | 32 | 1940 | Significant | Poor |
| Monroe Basin Dam Muskingum County | 14 | — | Low | Poor |
| Monroe Lake Dam Monroe County | 58 | 1956 | High | Fair |
| Monroeville Upground Reservoir Huron County | 17 | 2000 | Significant | Fair |
| Montezuma Club Island Wwt Lagoon Cell 4 Mercer County | 17 | 2012 | Significant | Fair |
| Montezuma/Club Island Wwt Lagoons Mercer County | 17 | 1985 | Significant | Fair |
| Mont-Mere Lake Dam Geauga County | 28 | 1969 | High | Fair |
| Moore Lake Dam Coshocton County | 16 | 1975 | Low | Fair |
| Morelli Pond Dam Stark County | 19 | — | Significant | Poor |
| Mosquito Creek Dam Trumbull County | 47 | 1944 | High | Not Available |
| Mount Gilead Lower Lake Dam Morrow County | 33 | 2018 | High | Satisfactory |
| Mount Orab Upground Reservoir No. 2 Brown County | 31 | 1974 | High | Satisfactory |
| Mowrer Lake Dam Wayne County | 9 | 1961 | Significant | Poor |
| Mt. Victory Sewage Lagoon Hardin County | 13 | 1996 | Significant | Satisfactory |
Data sourced from the National Inventory of Dams (NID). Hazard classification reflects potential consequences of failure, not the likelihood of failure.