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 1201–1225 of 1,377
| Dam Name | Height (ft) | Year | Hazard | Condition |
|---|---|---|---|---|
| Swan Lake Dam Summit County | 20 | 1995 | High | Poor |
| Swan Lake Dam Butler County | 18 | 1953 | High | Satisfactory |
| Swanton Upground Reservoir Lucas County | 24 | 1937 | Significant | Fair |
| Swift Run Lake Dam Miami County | 39 | 1876 | Significant | Poor |
| Swiger Pond Dam Ashland County | 27 | 1965 | Low | Poor |
| Swing Bridge Lake Dam Allen County | 19 | 1967 | Undetermined | Not Rated |
| Switzerland Lake Dam Belmont County | 54 | 1956 | Significant | Fair |
| Sycamore Creek Lake Dam Warren County | 33 | — | Low | Poor |
| Sycamore Lake Dam Licking County | 21 | 1961 | Low | Fair |
| Syler Lake Dam Stark County | 16 | 1961 | Undetermined | Not Rated |
| Sylvan Dam Summit County | 25 | — | High | Not Available |
| Tall Timber Lake Dam Tuscarawas County | 26 | 1960 | Low | Poor |
| Tanager Woods Lake Dam Hamilton County | 19 | — | Significant | Poor |
| Tanglewood Lake Dam Geauga County | 37 | 1971 | High | Fair |
| Tappan Dam Harrison County | 52 | 1936 | High | Not Available |
| Tara Lake Dam Greene County | 20 | 1969 | Significant | Poor |
| Tarhe Dry Dam Fairfield County | 30 | 1995 | High | Fair |
| Taylor Lake Dam Lorain County | 20 | 1968 | Low | Satisfactory |
| Taylor Lake Dam Logan County | 23 | 1972 | Significant | Fair |
| Taylorsville Dam Montgomery County | 78 | 1922 | High | Fair |
| Tecumseh Lake Dam Perry County | 25 | 1954 | Significant | Poor |
| Tennessee Gas Station 204 Lake Dam Vinton County | 30 | 1950 | Low | Fair |
| Tennessee Gas Station 209 Lake Dam Guernsey County | 18 | 1951 | Significant | Poor |
| Tennessee Gas Station 214 Lake Dam Carroll County | 22 | 1950 | Low | Poor |
| Terraco Lake Dam Medina County | 20 | — | Significant | Poor |
Data sourced from the National Inventory of Dams (NID). Hazard classification reflects potential consequences of failure, not the likelihood of failure.