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 101–125 of 564
| Dam Name | Height (ft) | Year | Hazard | Condition |
|---|---|---|---|---|
| Coldwater Wastewater Treatment Dam Mercer County | 26 | 1991 | Significant | Satisfactory |
| College Corner Upground Reservoir No. 2 Preble County | 14 | 1965 | Significant | Poor |
| Collins Park Wtp Sludge Lagoon A Lucas County | 12 | 1954 | Significant | Satisfactory |
| Collins Park Wtp Sludge Lagoon E Lucas County | 33 | 1987 | Significant | Satisfactory |
| Columbia Lake Dam Summit County | 17 | 1914 | Significant | Poor |
| Conesville Plant Ash Pond Complex Coshocton County | 35 | — | Significant | Poor |
| Cooke Pond No. 1 Dam Richland County | 17 | 1964 | Significant | Poor |
| Cooke Pond No. 2 Dam Richland County | 13 | 1968 | Significant | Poor |
| Cooper Valley LLC Dam Jefferson County | 42 | 1963 | Significant | Poor |
| Crossings of Springdale Lake No. 1 Dam Hamilton County | 29 | 1979 | Significant | Fair |
| Cross Pond Dam Preble County | 31 | 1970 | Significant | Fair |
| Crouse Pond Dam Summit County | 12 | — | Significant | Poor |
| Crystal Lake Dam Summit County | 14 | 1936 | Significant | Fair |
| Crystal Lake Dam Stark County | 10 | 1955 | Significant | Poor |
| Csonka Brothers Pond Dam Columbiana County | 24 | 1975 | Significant | Poor |
| Cygnet Wwt Lagoon Wood County | 9 | 1994 | Significant | Satisfactory |
| Darrow Lake No. 1 Dam (Upper) Guernsey County | 26 | 1960 | Significant | Poor |
| Darty Stowe Lake Dam Noble County | 37 | 1987 | Significant | Satisfactory |
| Davlin Lynch LLC Dam Washington County | 23 | — | Significant | Satisfactory |
| Decker Lake Dam Licking County | 23 | 1993 | Significant | Satisfactory |
| Decker Lake Dam Miami County | 16 | 1940 | Significant | Poor |
| Deer Creek Reservoir Dam Stark County | 34 | 1954 | Significant | Fair |
| Deerfoot Lake Dam Perry County | 28 | — | Significant | Poor |
| Dickerson Slurry No. 3 Dam Harrison County | 54 | 1982 | Significant | Not Rated |
| Di-Or Lake Dam Jackson County | 32 | 1972 | Significant | Poor |
Data sourced from the National Inventory of Dams (NID). Hazard classification reflects potential consequences of failure, not the likelihood of failure.