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 301–325 of 421
| Dam Name | Height (ft) | Year | Hazard | Condition |
|---|---|---|---|---|
| Geneva Hills Lake Dam Fairfield County | 30 | — | Significant | Fair |
| General Motors Primary Lagoon Defiance County | 30 | 1940 | Significant | Fair |
| Galicki Lake Dam Ashtabula County | 22 | 1973 | Low | Fair |
| Friendship Park Lake Dam Jefferson County | 94 | 1972 | High | Fair |
| Fostoria Upground Reservoir No. 5 Hancock County | 36 | 1958 | High | Fair |
| Fish Lake Dam Adams County | 27 | 1971 | Low | Fair |
| Firelands Lake No. 1 Dam Lorain County | 14 | 1966 | Low | Fair |
| Findlay Upground Reservoir No. 2 Hancock County | 32 | 1971 | High | Fair |
| Findlay Upground Reservoir No. 1 Hancock County | 28 | 1950 | High | Fair |
| Ferguson Upground Reservoir Allen County | 49 | 1959 | High | Fair |
| Fayette Sewage Lagoons Fulton County | 15 | 1963 | Significant | Fair |
| Fallsville Wildlife Area Dam Highland County | 28 | 1963 | Low | Fair |
| Evergreen Lake Dam Lucas County | 20 | 1955 | Significant | Fair |
| Evans Lake Dam Mahoning County | 49 | 1948 | High | Fair |
| Essington Lake Dam Perry County | 20 | 1945 | High | Fair |
| Englewood Dam Montgomery County | 121 | 1922 | High | Fair |
| Ellis Lake No. 2 Dam Wyandot County | 25 | 1955 | Significant | Fair |
| Ellis Lake Dam Clinton County | 31 | 1986 | Low | Fair |
| Elk Lake Dam Warren County | 20 | 1964 | Low | Fair |
| Elkem Sludge Holding Pond 5c Dam Ashtabula County | 20 | 1988 | Significant | Fair |
| Elkem Fluid Waste Pond 3a Ashtabula County | 40 | 1967 | Significant | Fair |
| Elk Creek Meadow Ridge Pond #2 Dam Butler County | 23 | 1970 | Significant | Fair |
| Elk Creek Meadow Ridge Pond #1 Dam Butler County | 26 | 1970 | Significant | Fair |
| East Fork Buck Creek Structure Iv-A Champaign County | 39 | 1966 | Significant | Fair |
| East Fork Buck Creek Structure Iii-A Champaign County | 35 | 1966 | Significant | Fair |
Data sourced from the National Inventory of Dams (NID). Hazard classification reflects potential consequences of failure, not the likelihood of failure.