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 276–300 of 1,377
| Dam Name | Height (ft) | Year | Hazard | Condition |
|---|---|---|---|---|
| Davlin Lynch LLC Dam Washington County | 23 | — | Significant | Satisfactory |
| Dawes Arboretum Lake Dam Licking County | 22 | 1954 | High | Satisfactory |
| Dayton Airport Detention Pond Dam Montgomery County | 13 | 1981 | Low | Satisfactory |
| Decker Lake Dam Licking County | 23 | 1993 | Significant | Satisfactory |
| Decker Lake Dam Miami County | 16 | 1940 | Significant | Poor |
| Deer Creek Dam Pickaway County | 93 | 1968 | High | Not Available |
| Deer Creek Reservoir Dam Stark County | 34 | 1954 | Significant | Fair |
| Deerfoot Lake Dam Perry County | 28 | — | Significant | Poor |
| Deer Lake Dam Muskingum County | 30 | 1957 | High | Poor |
| Deer Lake Estates Dam Geauga County | 20 | 1992 | Low | Fair |
| Defiance Upground Reservoir Defiance County | 24 | 2007 | High | Fair |
| Delaware Dam Delaware County | 92 | 1951 | High | Not Available |
| Del-Co Upland Storage Reservoir No. 2 Delaware County | 43 | 1989 | High | Satisfactory |
| Del-Co Upland Storage Reservoir No. 3 Delaware County | 51 | 1994 | High | Fair |
| Del-Co Upland Storage Reservoir No. 4 Delaware County | 53 | 1995 | High | Fair |
| Del-Co Upland Storage Reservoir No. 5 Delaware County | 45 | 2004 | High | Fair |
| Delphos Reservoir Dam Van Wert County | 29 | 2007 | High | Satisfactory |
| Delta Reservoir No. 1 Fulton County | 22 | 1933 | High | Poor |
| Delta Upground Reservoir No. 2 Fulton County | 42 | 1984 | High | Satisfactory |
| Devils Den Park Lake No. 2 Dam Tuscarawas County | 29 | — | Low | Poor |
| Dews Pond Dam Carroll County | 12 | 1972 | Low | Poor |
| Dickerson Slurry No. 3 Dam Harrison County | 54 | 1982 | Significant | Not Rated |
| Dickey Lake Dam Columbiana County | 14 | 1945 | Low | Poor |
| Diebel Lake Dam Hamilton County | 30 | 1980 | Low | Poor |
| Dillon Dam Muskingum County | 118 | 1960 | High | Not Available |
Data sourced from the National Inventory of Dams (NID). Hazard classification reflects potential consequences of failure, not the likelihood of failure.