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 326–350 of 397
| Dam Name | Height (ft) | Year | Hazard | Condition |
|---|---|---|---|---|
| Sharonville Retention Dam Hamilton County | 46 | 1967 | High | Fair |
| Shelby Upground Reservoir No. 2 Richland County | 48 | 1955 | High | Fair |
| Shelby Upground Reservoir No. 3 Richland County | 28 | 1993 | High | Fair |
| Shreve Lake Dam Wayne County | 25 | 1962 | High | Unsatisfactory |
| Siedel Lake Dam Medina County | 39 | 1968 | High | Fair |
| Silver Creek Lake Dam Summit County | 25 | 1990 | High | Satisfactory |
| Southern Silica Pond No. 2 Dam Ross County | 38 | 1956 | High | Poor |
| Spring Valley Park Lake Dam Columbiana County | 29 | 1993 | High | Poor |
| St. Clairsville Reservoir No. 1 Dam Belmont County | 36 | 1929 | High | Satisfactory |
| St. Clairsville Reservoir No. 2 Dam Belmont County | 31 | 1920 | High | Satisfactory |
| Steeplechase Lake Dam Summit County | 21 | 1989 | High | Satisfactory |
| Stevens Lake Dam Harrison County | 39 | 1963 | High | Poor |
| Stingy Run Fly Ash Dam Gallia County | 93 | 1974 | High | Satisfactory |
| Stockport Mill Country Inn Water Power Project Morgan County | 20 | 1891 | High | Satisfactory |
| Stonegate Pond Dam Butler County | 21 | 1985 | High | Fair |
| Stonelick Lake Dam Clermont County | 35 | 1949 | High | Fair |
| Sunbury Upground Reservoir No. 1 Delaware County | 17 | 1955 | High | Fair |
| Sunbury Upground Reservoir No. 2 Delaware County | 20 | 1964 | High | Fair |
| Sunrise Lake Dam Warren County | 54 | 1931 | High | Satisfactory |
| Sunset Lake Dam Coshocton County | 27 | 1947 | High | Satisfactory |
| Swan Lake Dam Butler County | 18 | 1953 | High | Satisfactory |
| Swan Lake Dam Summit County | 20 | 1995 | High | Poor |
| Sylvan Dam Summit County | 25 | — | High | Not Available |
| Tanglewood Lake Dam Geauga County | 37 | 1971 | High | Fair |
| Tappan Dam Harrison County | 52 | 1936 | High | Not Available |
Data sourced from the National Inventory of Dams (NID). Hazard classification reflects potential consequences of failure, not the likelihood of failure.