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 451–475 of 564
| Dam Name | Height (ft) | Year | Hazard | Condition |
|---|---|---|---|---|
| Crystal Lake Dam Summit County | 14 | 1936 | Significant | Fair |
| Crystal Lake Dam Stark County | 10 | 1955 | Significant | Poor |
| Crouse Pond Dam Summit County | 12 | — | Significant | Poor |
| Cross Pond Dam Preble County | 31 | 1970 | Significant | Fair |
| Crossings of Springdale Lake No. 1 Dam Hamilton County | 29 | 1979 | Significant | Fair |
| Cooper Valley LLC Dam Jefferson County | 42 | 1963 | Significant | Poor |
| Cooke Pond No. 2 Dam Richland County | 13 | 1968 | Significant | Poor |
| Cooke Pond No. 1 Dam Richland County | 17 | 1964 | Significant | Poor |
| Conesville Plant Ash Pond Complex Coshocton County | 35 | — | Significant | Poor |
| Columbia Lake Dam Summit County | 17 | 1914 | Significant | Poor |
| 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 |
| Coldwater Wastewater Treatment Dam Mercer County | 26 | 1991 | Significant | Satisfactory |
| 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 |
| Cline Lake Dam Knox County | 19 | 1958 | Significant | Fair |
| Clarksville Upground Reservoir Clinton County | 18 | 1949 | Significant | Unsatisfactory |
| Clare-Mar Camp Lake Dam Lorain County | 19 | — | Significant | Poor |
| Clapper Lake Dam Stark County | 17 | — | Significant | Poor |
| City of Shaker Heights Dam Cuyahoga County | 24 | — | Significant | Satisfactory |
| City of Hudson Upper Lake Dam Summit County | 21 | — | Significant | Satisfactory |
| City of Cambridge Park Dam Guernsey County | 16 | — | Significant | Poor |
| Cincinnati Semiconductor Lake Dam Warren County | 22 | — | Significant | Fair |
Data sourced from the National Inventory of Dams (NID). Hazard classification reflects potential consequences of failure, not the likelihood of failure.