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 376–400 of 564
| Dam Name | Height (ft) | Year | Hazard | Condition |
|---|---|---|---|---|
| Hap Cremean Lagoon #2 Franklin County | 12 | 2010 | Significant | Satisfactory |
| Hap Cremean Lagoon #1 Franklin County | 14 | 2011 | Significant | Satisfactory |
| Hamilton Lime Sludge Lagoon Butler County | 11 | 1992 | Significant | Fair |
| Hamilton County Anglers Lake Dam Clermont County | 34 | 1950 | Significant | Satisfactory |
| Halley Pond Dam Morgan County | 32 | 1959 | Significant | Poor |
| Gross Lake Dam Wayne County | 50 | 1977 | Significant | Satisfactory |
| Greenlawn Avenue Low Head Dam Franklin County | 11 | 1929 | Significant | Satisfactory |
| Greene Town Center Dam Greene County | 20 | 2005 | Significant | Fair |
| Graymont Sludge Lagoons Ottawa County | 18 | 1981 | Significant | Fair |
| Granger Lake Dam Medina County | 13 | — | Significant | Fair |
| Goodrich Lake Dam Warren County | 22 | 1994 | Significant | Satisfactory |
| Glen Willow Lake Dam Clermont County | 18 | — | Significant | Poor |
| Glen Ridge Lake Dam Clermont County | 42 | 1950 | Significant | Fair |
| Giel Lake Dam Geauga County | 15 | — | Significant | Poor |
| Georgetown Upground Reservoir Brown County | 27 | 1959 | Significant | Poor |
| Georgetown Plant Upper Supply Pond Dam Harrison County | 10 | 1948 | Significant | Not Rated |
| Georgetown Plant Lower Supply Pond Dam Harrison County | 45 | 1951 | Significant | Not Rated |
| Genon Energy South Pond Dam Trumbull County | 14 | — | Significant | Satisfactory |
| Genon Energy North Pond Dam Trumbull County | 20 | 1955 | Significant | Satisfactory |
| Genoa Ug Sewage Disposal Lgn Cells 1,2,3&4 Ottawa County | 10 | 1963 | Significant | Satisfactory |
| Geneva Hills Lake Dam Fairfield County | 30 | — | Significant | Fair |
| General Motors Secondary Lagoon Defiance County | 29 | — | Significant | Poor |
| General Motors Primary Lagoon Defiance County | 30 | 1940 | Significant | Fair |
| Gallery Lake Dam Medina County | 12 | — | Significant | Poor |
| Fugate Lake Dam Clermont County | 13 | 1969 | Significant | Poor |
Data sourced from the National Inventory of Dams (NID). Hazard classification reflects potential consequences of failure, not the likelihood of failure.