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 126–150 of 421
| Dam Name | Height (ft) | Year | Hazard | Condition |
|---|---|---|---|---|
| Gonzalez Lake Dam Stark County | 13 | 1995 | Low | Fair |
| Grand Rapids Dam Wood County | 8 | 1907 | High | Fair |
| Granger Lake Dam Medina County | 13 | — | Significant | Fair |
| Graymont Sludge Lagoons Ottawa County | 18 | 1981 | Significant | Fair |
| Greene Co. Fish & Game Pond No. 1 Dam Greene County | 28 | 1954 | Low | Fair |
| Greene Town Center Dam Greene County | 20 | 2005 | Significant | Fair |
| Grogg Lake Dam Richland County | 17 | 2001 | Low | Fair |
| Hamilton Fairfield Airport Dam Butler County | 16 | 1995 | Low | Fair |
| Hamilton Lime Sludge Lagoon Butler County | 11 | 1992 | Significant | Fair |
| Hance Lake Dam Knox County | 28 | 1991 | Low | Fair |
| Harper Lake Dam Fairfield County | 19 | 1971 | Low | Fair |
| Hartman Dam Huron County | 19 | 1972 | Low | Fair |
| Havens Lake Dam Delaware County | 38 | 1980 | Low | Fair |
| Hawthorne Valley Country Club Lake Dam Cuyahoga County | 31 | — | Low | Fair |
| Hayes Lake Dam Cuyahoga County | 45 | 1968 | Significant | Fair |
| Hay Hollow Reservoir Dam Pike County | 34 | 1952 | Low | Fair |
| Heil Lake Dam Guernsey County | 26 | 1991 | Significant | Fair |
| Heimann Pond Dam Hamilton County | 35 | 1964 | Significant | Fair |
| Herbert Pond Dam Coshocton County | 26 | 1979 | Low | Fair |
| Hermitage Club Lake Dam Hamilton County | 38 | 1918 | Significant | Fair |
| Hickory Hollow Lake Dam Guernsey County | 32 | 1969 | Low | Fair |
| Hickory Lake Dam Holmes County | 39 | 1967 | Low | Fair |
| Hidden Haven Lake Dam Guernsey County | 44 | 1961 | Significant | Fair |
| Hillsboro Reservoir No. 1 Dam Highland County | 42 | 1945 | Significant | Fair |
| Hills of Eden Lake Dam Harrison County | 16 | 1970 | Low | Fair |
Data sourced from the National Inventory of Dams (NID). Hazard classification reflects potential consequences of failure, not the likelihood of failure.