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 1001–1025 of 1,377
| Dam Name | Height (ft) | Year | Hazard | Condition |
|---|---|---|---|---|
| Quail Lakes - Upper Lake Dam Medina County | 15 | 1972 | Significant | Fair |
| Raccoon Creek Upground Reservoir Sandusky County | 29 | 1950 | High | Fair |
| Rainbow Lake Dam Athens County | 31 | — | Significant | Poor |
| Ranger Lake Dam Cuyahoga County | 26 | 1980 | Undetermined | Not Rated |
| Ravens Wood Lake Dam Medina County | 30 | 1973 | High | Satisfactory |
| Ravines of Eastgate Dam Clermont County | 15 | 1995 | Significant | Poor |
| Rawson Wwt Lagoon Hancock County | 15 | 2003 | Significant | Satisfactory |
| Rayls Lake Dam Columbiana County | 22 | 1955 | Significant | Poor |
| Realty Investment Property Dam Huron County | 16 | 1968 | Low | Satisfactory |
| Red Hill Farm Dam No. 1 Guernsey County | 48 | 1994 | Significant | Fair |
| Red Hill Farm Dam No. 2 Guernsey County | 27 | 1994 | Low | Satisfactory |
| Red Hill Farm Dam No. 3 Guernsey County | 44 | 1994 | Significant | Satisfactory |
| Red Hill Farm Dam No. 4 Guernsey County | 40 | 1994 | Low | Satisfactory |
| Reed Lake Dam Carroll County | 27 | 1970 | Significant | Poor |
| Refinery Upground West Reservoir Allen County | 9 | 1968 | Significant | Satisfactory |
| Refuse Imp. (Sands Hill Reservoir) Vinton County | 100 | — | High | Not Available |
| Remick Lake Dam Warren County | 29 | 1966 | High | Poor |
| Republic Wwt Lagoon Seneca County | 12 | 2003 | Significant | Satisfactory |
| Reservoir Park Upground Summit County | 26 | 1910 | High | Fair |
| R-Farm Lake Dam Medina County | 30 | 1939 | Low | Poor |
| R & F Lamira Freshwater Dam Belmont County | 45 | 1979 | Significant | Satisfactory |
| Rhoads Lake Dam Morgan County | 21 | 1964 | Undetermined | Not Rated |
| Rhoads Lake Dam (Upper) Ashland County | 18 | 1956 | Significant | Satisfactory |
| Rice Pond Dam Medina County | 31 | — | Low | Fair |
| Ridgewood Lake Dam Medina County | 12 | 1965 | High | Poor |
Data sourced from the National Inventory of Dams (NID). Hazard classification reflects potential consequences of failure, not the likelihood of failure.