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 501
| Dam Name | Height (ft) | Year | Hazard | Condition |
|---|---|---|---|---|
| Muskingum River Lock and Dam No. 8 Morgan County | 20 | 1841 | Significant | Poor |
| Muskingum River Lock and Dam No. 9 Muskingum County | 18 | 1841 | Significant | Poor |
| Myers Pond Dam Belmont County | 28 | 1966 | Low | Poor |
| Mystic Lake Dam Greene County | 12 | 1950 | Low | Poor |
| Naji Lake Dam Ashtabula County | 19 | 1963 | High | Poor |
| New Lexington Reservoir Dam Perry County | 45 | 1936 | High | Poor |
| New York Central Reservoir Dam Perry County | 12 | 1935 | Significant | Poor |
| Nimisila Reservoir Dam Summit County | 44 | 1936 | High | Poor |
| North Kingsville Route 20 Lake Dam Ashtabula County | 22 | 1900 | Significant | Poor |
| North Reservoir Dam Summit County | 13 | 1840 | High | Poor |
| Nova Pond Dam Ashland County | 15 | 1930 | Significant | Poor |
| O'Brien Lake Dam Ashtabula County | 24 | 1968 | Low | Poor |
| Ockenga Lake Dam Huron County | 29 | 1966 | Low | Poor |
| Ohio Power Company Pond Mum-67 Muskingum County | 36 | — | Low | Poor |
| Old Man'S Cave Lake Dam Hocking County | 64 | 1972 | High | Poor |
| Olivito Lake Dam Carroll County | 32 | 1973 | Low | Poor |
| O'Neill Lake Dam Cuyahoga County | 28 | — | Low | Poor |
| Orrville Farmer'S & Sportsmen'S League Dam Wayne County | 16 | — | Low | Poor |
| Owensville Lake Dam Clermont County | 24 | 1951 | Significant | Poor |
| Oxbow Lake Dam Defiance County | 18 | 1953 | Low | Poor |
| Palmetto Lake Dam Ashtabula County | 12 | — | Significant | Poor |
| P and J Lake Dam Carroll County | 21 | 1965 | Significant | Poor |
| Paradise Lakes Campground Lake Dam Trumbull County | 22 | 1958 | Low | Poor |
| Paradise Lakes - South Lake Dam Preble County | 40 | 1946 | High | Poor |
| Parker Lakes Lower Dam Clark County | 19 | 2004 | Low | Poor |
Data sourced from the National Inventory of Dams (NID). Hazard classification reflects potential consequences of failure, not the likelihood of failure.