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 326–350 of 564
| Dam Name | Height (ft) | Year | Hazard | Condition |
|---|---|---|---|---|
| Mcclure Wwt Lagoon Henry County | 9 | 1997 | Significant | Satisfactory |
| Meadowbrook Lake Dam Summit County | 16 | 1920 | Significant | Poor |
| Meadow Lake Dam Stark County | 19 | — | Significant | Satisfactory |
| Meigs Mine No. 1 Water Supply Dam Meigs County | 32 | 1973 | Significant | Not Rated |
| Memory Lake Dam Tuscarawas County | 27 | — | Significant | Poor |
| 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 |
| 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 |
| Miner Pond Dam Portage County | 24 | 1967 | Significant | Poor |
| Mingo Sportsman Club Pond Dam Jefferson County | 49 | 1969 | Significant | Poor |
| Moe Pond Dam Fairfield County | 19 | 1975 | Significant | Satisfactory |
| Mohawk Lake Dam Seneca County | 18 | 1913 | Significant | Satisfactory |
| Moll Lake Dam Medina County | 32 | 1940 | Significant | Poor |
| 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 |
| Morelli Pond Dam Stark County | 19 | — | Significant | Poor |
| 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.