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 1026–1050 of 1,377
| Dam Name | Height (ft) | Year | Hazard | Condition |
|---|---|---|---|---|
| Rio Grande Reservoir Gallia County | 30 | 1959 | High | Poor |
| Rippe Pond No. 2 Dam Warren County | 34 | 1968 | Significant | Fair |
| Ritz Lake Dam Guernsey County | 30 | 1973 | Low | Poor |
| Roaming Rock Shores Lake Dam Ashtabula County | 45 | 1967 | High | Poor |
| Robbins Pond Dam Allen County | 18 | 1992 | Low | Satisfactory |
| Roberts Lake Dam Clinton County | 19 | — | Significant | Poor |
| Robins Ridge Golf Club Lake No. 1 Dam Guernsey County | 26 | 1970 | Low | Fair |
| Robins Ridge Golf Club Lake No. 2 Dam Guernsey County | 28 | — | Low | Fair |
| Rock Island Lake Dam Mahoning County | 34 | 1964 | Undetermined | Not Rated |
| Rocky Fork Lake Dam Highland County | 74 | 1952 | High | Poor |
| Rod Lake Dam Jefferson County | 41 | 1949 | Significant | Poor |
| Roemer Lake Dam Warren County | 52 | 1960 | Significant | Satisfactory |
| Rogers Lake Dam Morrow County | 14 | 1900 | Significant | Fair |
| Rogers Lake Dam Stark County | 13 | — | Low | Poor |
| Rohr Dam Carroll County | 18 | 1973 | Significant | Fair |
| Rohr'S Lake Dam Ashland County | 22 | 1971 | Low | Poor |
| Roosevelt Lake Dam Scioto County | 26 | 1934 | High | Satisfactory |
| Rose Lake Upper Dam Warren County | 36 | 1950 | Low | Satisfactory |
| Ross Lake Dam Ross County | 48 | 1967 | High | Poor |
| Ross Trails Lake Dam Butler County | 48 | 1960 | High | Satisfactory |
| Roundup Lake Dam Portage County | 12 | 1949 | Significant | Poor |
| Rouster Lake Dam Clermont County | 20 | 1947 | Significant | Satisfactory |
| Royal Oak Golf Course Pond No. 1 Dam Clermont County | 27 | 1964 | Significant | Poor |
| Royal Oak Golf Course Pond No. 2 Dam Clermont County | 39 | 1966 | Significant | Poor |
| Royal Oak Lake Dam Meigs County | 34 | 1964 | Significant | Satisfactory |
Data sourced from the National Inventory of Dams (NID). Hazard classification reflects potential consequences of failure, not the likelihood of failure.