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 201–225 of 564
| Dam Name | Height (ft) | Year | Hazard | Condition |
|---|---|---|---|---|
| Hidden Haven Lake Dam Guernsey County | 44 | 1961 | Significant | Fair |
| Hidden Lake Dam Hocking County | 28 | 1957 | Significant | Satisfactory |
| Hidden Lake Dam Miami County | 21 | 1977 | Significant | Poor |
| Hidden Lakes Dam Geauga County | 22 | 1954 | Significant | Poor |
| Hidden Lakes Upper Dam Meigs County | 26 | — | Significant | Poor |
| Hidden Valley Acres Dam Holmes County | 30 | 1958 | Significant | Poor |
| Hillsboro Reservoir No. 1 Dam Highland County | 42 | 1945 | Significant | Fair |
| Hillsboro Upground Reservoir Highland County | 48 | 1991 | Significant | Poor |
| Hills Pond Dam Summit County | 15 | 1938 | Significant | Fair |
| Holiday Haven Lake Dam Ii Hocking County | 27 | 1965 | Significant | Poor |
| Holland Lake Dam Logan County | 34 | — | Significant | Poor |
| Homestead Neighbors Lake Dam Delaware County | 14 | 1949 | Significant | Fair |
| Horse Run No. 1 Dam Mb-42 Morgan County | 60 | 1952 | Significant | Fair |
| Horse Run No. 3 Dam Mb-40 Morgan County | 42 | 1961 | Significant | Fair |
| Houston Upground Reservoir Clinton County | 13 | 1935 | Significant | Poor |
| Howard Farm Cell 2 Dam Lucas County | 14 | — | Significant | Satisfactory |
| Huber Lake Dam Stark County | 23 | 1966 | Significant | Poor |
| Hudson Springs Lake Dam Summit County | 18 | 1948 | Significant | Satisfactory |
| Hunters Run Structure No. 2 Fairfield County | 56 | 1955 | Significant | Satisfactory |
| Hunters Run Structure No. 5 Fairfield County | 41 | 1961 | Significant | Fair |
| Hunters Run Structure No. R-23 Fairfield County | 40 | 1960 | Significant | Satisfactory |
| Hunters Run Structure No. R-63 Fairfield County | 30 | 1961 | Significant | Poor |
| Hutchison Lake Dam Ross County | 42 | 1961 | Significant | Fair |
| Imars Lake Dam Medina County | 22 | 1966 | Significant | Poor |
| Independence Dam Defiance County | 12 | 1924 | Significant | Poor |
Data sourced from the National Inventory of Dams (NID). Hazard classification reflects potential consequences of failure, not the likelihood of failure.