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 1326–1350 of 1,377
| Dam Name | Height (ft) | Year | Hazard | Condition |
|---|---|---|---|---|
| Bainbridge Quarry Lake Dam Geauga County | 13 | 1989 | Low | Fair |
| Bailey Lake Dam Brown County | 26 | 1972 | Undetermined | Not Rated |
| Bailey Lake Dam Ashland County | 15 | — | Significant | Satisfactory |
| Badger Pond Dam Washington County | 28 | — | Low | Fair |
| Bader Lake Dam Licking County | 22 | 1961 | Significant | Poor |
| Bacon Low Head Dam Seneca County | 8 | 1922 | Undetermined | Not Rated |
| Avis Dam Athens County | 27 | 1997 | Low | Not Rated |
| Auglaize River Wwt Lagoon Defiance County | 12 | 2011 | Significant | Satisfactory |
| Auglaize Hydro Defiance County | 25 | 1913 | Low | Satisfactory |
| Atwood Dam Tuscarawas County | 65 | 1936 | High | Not Available |
| Attica Wastewater Treatment Lagoon Seneca County | 16 | 2016 | Significant | Fair |
| Attica Upground Reservoir #2 Seneca County | 23 | 2006 | High | Fair |
| Attica Upground Reservoir Seneca County | 14 | 1955 | Significant | Poor |
| Aston Oaks Lake Dam Hamilton County | 66 | 2000 | High | Fair |
| Ashtabula County Outdoor Club Lake Dam Ashtabula County | 22 | 1928 | High | Poor |
| Ashley Waterworks Reservoir Delaware County | 12 | 1954 | Significant | Poor |
| Ashley Lake Dam Knox County | 25 | 1971 | Significant | Fair |
| Artesian Lake Dam Ashland County | 18 | — | High | Poor |
| Arrowhead Lake Dam No. 1 Mahoning County | 30 | 1952 | Significant | Fair |
| Arnold Lake Dam Tuscarawas County | 35 | — | Low | Fair |
| Arnett Lake No. 2 Dam Warren County | 13 | 1967 | Significant | Fair |
| Arnett Lake No. 1 Dam Warren County | 26 | 1967 | Significant | Fair |
| Arnett Lake Dam Pike County | 22 | 1973 | High | Fair |
| Armington Dam No. 1 Summit County | 26 | 1979 | Low | Not Available |
| Archbold Upground Reservoir No. 2 Fulton County | 22 | 1961 | High | Poor |
Data sourced from the National Inventory of Dams (NID). Hazard classification reflects potential consequences of failure, not the likelihood of failure.