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 351–375 of 564
| Dam Name | Height (ft) | Year | Hazard | Condition |
|---|---|---|---|---|
| Horse Run No. 3 Dam Mb-40 Morgan County | 42 | 1961 | Significant | Fair |
| Horse Run No. 1 Dam Mb-42 Morgan County | 60 | 1952 | Significant | Fair |
| Homestead Neighbors Lake Dam Delaware County | 14 | 1949 | Significant | Fair |
| Holland Lake Dam Logan County | 34 | — | Significant | Poor |
| Holiday Haven Lake Dam Ii Hocking County | 27 | 1965 | Significant | Poor |
| Hills Pond Dam Summit County | 15 | 1938 | Significant | Fair |
| Hillsboro Upground Reservoir Highland County | 48 | 1991 | Significant | Poor |
| Hillsboro Reservoir No. 1 Dam Highland County | 42 | 1945 | Significant | Fair |
| Hidden Valley Acres Dam Holmes County | 30 | 1958 | Significant | Poor |
| Hidden Lakes Upper Dam Meigs County | 26 | — | Significant | Poor |
| Hidden Lakes Dam Geauga County | 22 | 1954 | Significant | Poor |
| Hidden Lake Dam Hocking County | 28 | 1957 | Significant | Satisfactory |
| Hidden Lake Dam Miami County | 21 | 1977 | Significant | Poor |
| Hidden Haven Lake Dam Guernsey County | 44 | 1961 | Significant | Fair |
| Hickory Nut Golf Course Lake Dam Lorain County | 17 | 1963 | Significant | Poor |
| Hickory Lake Dam Defiance County | 26 | 1964 | Significant | Poor |
| Hickory Hills Lake Dam Highland County | 44 | 1971 | Significant | Satisfactory |
| Hermitage Club Lake Dam Hamilton County | 38 | 1918 | Significant | Fair |
| Heimann Pond Dam Hamilton County | 35 | 1964 | Significant | Fair |
| Heil Lake Dam Guernsey County | 26 | 1991 | Significant | Fair |
| Hayes Lake Dam Cuyahoga County | 45 | 1968 | Significant | Fair |
| Harvey'S Lake Dam Geauga County | 19 | 1952 | Significant | Poor |
| Harrison Lake Dam Fulton County | 35 | 1941 | Significant | Poor |
| Happy Hills Lake Dam Hocking County | 44 | 1954 | Significant | Poor |
| Hap Cremean Lowhead Dam Franklin County | 14 | 1953 | Significant | Satisfactory |
Data sourced from the National Inventory of Dams (NID). Hazard classification reflects potential consequences of failure, not the likelihood of failure.