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 926–950 of 1,377
| Dam Name | Height (ft) | Year | Hazard | Condition |
|---|---|---|---|---|
| Hamilton Fairfield Airport Dam Butler County | 16 | 1995 | Low | Fair |
| Hamilton County Anglers Lake Dam Clermont County | 34 | 1950 | Significant | Satisfactory |
| Halls Lake Dam Preble County | 13 | 1935 | Low | Poor |
| Halley Pond Dam Morgan County | 32 | 1959 | Significant | Poor |
| Gund Pond No. 2 Dam Summit County | 26 | 1970 | Low | Poor |
| Gund Pond No. 1 Dam Summit County | 36 | 1970 | Low | Poor |
| Guilford Lake Dam Columbiana County | 35 | 1933 | High | Poor |
| Grubb Lake Dam Licking County | 21 | 1974 | Low | Poor |
| Gross Lake Dam Wayne County | 50 | 1977 | Significant | Satisfactory |
| Grogg Lake Dam Richland County | 17 | 2001 | Low | Fair |
| Grenke Lake Dam Ashtabula County | 16 | — | Low | Poor |
| Greenwich Reservoir Dam Huron County | 20 | 1921 | High | Poor |
| Greenlawn Avenue Low Head Dam Franklin County | 11 | 1929 | Significant | Satisfactory |
| Green Lake Dam Logan County | 25 | 2002 | Low | Satisfactory |
| Greene Town Center Dam Greene County | 20 | 2005 | Significant | Fair |
| Greene Co. Fish & Game Pond No. 1 Dam Greene County | 28 | 1954 | Low | Fair |
| Greenbriar Lake Dam Butler County | 38 | 1958 | Low | Poor |
| Graymont Sludge Lagoons Ottawa County | 18 | 1981 | Significant | Fair |
| Granger Lake Dam Medina County | 13 | — | Significant | Fair |
| Grand Rapids Dam Wood County | 8 | 1907 | High | Fair |
| Grand Lake St. Marys - West Embankment Mercer County | 20 | 1841 | High | Poor |
| Grand Lake St. Marys - East Embankment Auglaize County | 18 | 1841 | High | Poor |
| Gorge Plant Dam Summit County | 57 | 1912 | High | Poor |
| Goose Creek Dam Preble County | 29 | 1993 | Low | Satisfactory |
| Goodrich Lake Dam Warren County | 22 | 1994 | Significant | Satisfactory |
Data sourced from the National Inventory of Dams (NID). Hazard classification reflects potential consequences of failure, not the likelihood of failure.