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 226–250 of 564
| Dam Name | Height (ft) | Year | Hazard | Condition |
|---|---|---|---|---|
| Millwood Plant Dam Knox County | 14 | — | Significant | Fair |
| Mills Lake Dam Licking County | 25 | 1965 | Significant | Poor |
| Mill Pond Lake Dam Columbiana County | 22 | 1952 | Significant | Poor |
| Mike Lake Dam Mahoning County | 11 | 1958 | Significant | Poor |
| Mid-Western Childrens Home Lake Dam Warren County | 15 | 1967 | Significant | Fair |
| Middletown Sportsman Club Lake Dam Butler County | 41 | 1963 | Significant | Fair |
| Miami-Whitewater Forest Lake Dam Hamilton County | 35 | 1967 | Significant | Satisfactory |
| Miami View Golf Club Pond No. 2 Dam Hamilton County | 43 | — | Significant | Fair |
| Miami View Golf Club Pond No. 1 Dam Hamilton County | 38 | 1962 | Significant | Fair |
| Memory Lake Dam Tuscarawas County | 27 | — | Significant | Poor |
| Meigs Mine No. 1 Water Supply Dam Meigs County | 32 | 1973 | Significant | Not Rated |
| Meadow Lake Dam Stark County | 19 | — | Significant | Satisfactory |
| Meadowbrook Lake Dam Summit County | 16 | 1920 | Significant | Poor |
| Mcclure Wwt Lagoon Henry County | 9 | 1997 | Significant | Satisfactory |
| Mcclintock Lake Dam Allen County | 14 | 1982 | Significant | Poor |
| Mcbride Lake Dam Scioto County | 21 | — | Significant | Fair |
| Mathews Pond Dam Noble County | 58 | 1969 | Significant | Fair |
| Marsh Lake Dam Tuscarawas County | 43 | 1955 | Significant | Fair |
| Marshfield Lake Dam Cuyahoga County | 15 | 1940 | Significant | Poor |
| Marko Lake Dam Stark County | 22 | 1962 | Significant | Poor |
| Margaret Creek Structure No. 5 Athens County | 29 | 1970 | Significant | Satisfactory |
| Maplewood Lake Dam Meigs County | 19 | 1950 | Significant | Poor |
| Maple Valley Lake Dam Tuscarawas County | 27 | 1970 | Significant | Poor |
| Manfull Lake Dam Columbiana County | 18 | 1951 | Significant | Poor |
| Mallard Cove Lake Dam Hamilton County | 36 | 1984 | Significant | Fair |
Data sourced from the National Inventory of Dams (NID). Hazard classification reflects potential consequences of failure, not the likelihood of failure.