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 801–825 of 1,377
| Dam Name | Height (ft) | Year | Hazard | Condition |
|---|---|---|---|---|
| Mccomb Upground Reservoir No. 1 Hancock County | 17 | 1953 | High | Fair |
| Mccomb Upground Reservoir No. 2 Hancock County | 32 | 1979 | High | Fair |
| Mcgill Pond Dam Fairfield County | 25 | 1971 | Low | Not Available |
| Mckelvey Lake Dam Mahoning County | 77 | 1926 | High | Fair |
| Mcmillan Lake Dam Muskingum County | 27 | 1963 | Low | Satisfactory |
| Meadowbrook Lake Dam Summit County | 16 | 1920 | Significant | Poor |
| Meadow Lake Dam Stark County | 19 | — | Significant | Satisfactory |
| Meigs Mine No. 1 Slurry Impoundment Meigs County | 131 | — | High | Not Rated |
| Meigs Mine No. 1 Water Supply Dam Meigs County | 32 | 1973 | Significant | Not Rated |
| Meigs-Phillips I No. 1 Dam Belmont County | 58 | 1987 | High | Fair |
| Memory Lake Dam Tuscarawas County | 27 | — | Significant | Poor |
| Metamora Upground Reservoir Fulton County | 11 | 1986 | Low | Satisfactory |
| Metzger Upground Reservoir Allen County | 45 | 1946 | High | Fair |
| Miami View Golf Club Pond No. 1 Dam Hamilton County | 38 | 1962 | Significant | Fair |
| Miami View Golf Club Pond No. 2 Dam Hamilton County | 43 | — | Significant | Fair |
| Miami-Whitewater Forest Lake Dam Hamilton County | 35 | 1967 | Significant | Satisfactory |
| Michael J. Kirwan Dam Portage County | 83 | 1966 | High | Not Available |
| Middletown Sportsman Club Lake Dam Butler County | 41 | 1963 | Significant | Fair |
| Mid-Western Childrens Home Lake Dam Warren County | 15 | 1967 | Significant | Fair |
| Mike Lake Dam Mahoning County | 11 | 1958 | Significant | Poor |
| Mill Pond Lake Dam Columbiana County | 22 | 1952 | Significant | Poor |
| Mills Lake Dam Licking County | 25 | 1965 | Significant | Poor |
| Millwood Plant Dam Knox County | 14 | — | Significant | Fair |
| Mineral Ridge Dam Trumbull County | 60 | 1932 | High | Poor |
| Mineral Springs Resort Lake Dam Adams County | 67 | 1973 | High | Fair |
Data sourced from the National Inventory of Dams (NID). Hazard classification reflects potential consequences of failure, not the likelihood of failure.