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 1126–1150 of 1,377
| Dam Name | Height (ft) | Year | Hazard | Condition |
|---|---|---|---|---|
| Comstock Pond Dam Morgan County | 22 | 1962 | Low | Poor |
| Comet Lake Dam Summit County | 26 | 1922 | High | Poor |
| Columbus Southern Power Company Dam Ma-11 Muskingum County | 25 | — | Low | Poor |
| Columbia Lake Dam Summit County | 17 | 1914 | Significant | Poor |
| Collins Park Wtp Sludge Lagoons B & C Lucas County | 21 | 1987 | High | Fair |
| Collins Park Wtp Sludge Lagoon E Lucas County | 33 | 1987 | Significant | Satisfactory |
| Collins Park Wtp Sludge Lagoon A Lucas County | 12 | 1954 | Significant | Satisfactory |
| College Corner Upground Reservoir No. 2 Preble County | 14 | 1965 | Significant | Poor |
| Colebrook Lake No. 1 Dam Portage County | 17 | 1966 | Low | Fair |
| Coldwater Wastewater Treatment Dam Mercer County | 26 | 1991 | Significant | Satisfactory |
| Coldstream Country Club Dam No. 1 Hamilton County | 33 | 1971 | Low | Fair |
| Coalburg Lake Dam Trumbull County | 24 | 1916 | High | Poor |
| Cloverdale Lake Dam Lake County | 13 | — | Significant | Fair |
| Clouse Lake Dam Perry County | 29 | 1946 | Significant | Fair |
| Clinton County Wwt Lagoon Clinton County | 10 | 2007 | Significant | Satisfactory |
| Clinton County Tributary No. 4 Dam Clinton County | 20 | 1976 | High | Satisfactory |
| Clinton County Tributary No. 1 Dam Clinton County | 15 | 1976 | High | Satisfactory |
| Cline Lake Dam Noble County | 47 | 2003 | High | Fair |
| Cline Lake Dam Knox County | 19 | 1958 | Significant | Fair |
| Clermont Northeastern Schools Lake Dam Clermont County | 33 | 1956 | Undetermined | Not Rated |
| Clermont Golf Limited Lake Dam Clermont County | 37 | 1997 | High | Fair |
| Clendening Dam Harrison County | 64 | 1936 | High | Not Available |
| Clear Fork Reservoir Dam Richland County | 44 | 1949 | High | Poor |
| Clear Creek Lake Dam Shelby County | 21 | — | Low | Poor |
| Clay'S Park Lake Dam Stark County | 15 | 1955 | Low | Poor |
Data sourced from the National Inventory of Dams (NID). Hazard classification reflects potential consequences of failure, not the likelihood of failure.