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 426–450 of 564
| Dam Name | Height (ft) | Year | Hazard | Condition |
|---|---|---|---|---|
| Elkem Fluid Waste Pond 3a Ashtabula County | 40 | 1967 | Significant | Fair |
| Elk Creek Meadow Ridge Pond #2 Dam Butler County | 23 | 1970 | Significant | Fair |
| Elk Creek Meadow Ridge Pond #1 Dam Butler County | 26 | 1970 | Significant | Fair |
| Edison Wwt Lagoon Morrow County | 10 | 2000 | Significant | Satisfactory |
| East Palestine Reservoir Dam Columbiana County | 18 | — | Significant | Poor |
| East Fork Buck Creek Structure Iv-A Champaign County | 39 | 1966 | Significant | Fair |
| East Fork Buck Creek Structure Iii-A Champaign County | 35 | 1966 | Significant | Fair |
| East Fork Buck Creek Structure Ii-B Champaign County | 26 | 1966 | Significant | Fair |
| East Fork Buck Creek Structure I-B Champaign County | 38 | 1966 | Significant | Poor |
| East Candlewood Lake Dam Wood County | 18 | 1962 | Significant | Poor |
| East Branch Black River Dam No. 2 Lorain County | 15 | — | Significant | Poor |
| Eagles Lake Dam Hamilton County | 30 | 1988 | Significant | Satisfactory |
| Dorothy Mine Pond Dam Jefferson County | 48 | 1950 | Significant | Fair |
| Donta Lake Dam Jackson County | 42 | 1965 | Significant | Poor |
| Di-Or Lake Dam Jackson County | 32 | 1972 | Significant | Poor |
| Dickerson Slurry No. 3 Dam Harrison County | 54 | 1982 | Significant | Not Rated |
| Deerfoot Lake Dam Perry County | 28 | — | Significant | Poor |
| Deer Creek Reservoir Dam Stark County | 34 | 1954 | Significant | Fair |
| Decker Lake Dam Miami County | 16 | 1940 | Significant | Poor |
| Decker Lake Dam Licking County | 23 | 1993 | Significant | Satisfactory |
| Davlin Lynch LLC Dam Washington County | 23 | — | Significant | Satisfactory |
| Darty Stowe Lake Dam Noble County | 37 | 1987 | Significant | Satisfactory |
| Darrow Lake No. 1 Dam (Upper) Guernsey County | 26 | 1960 | Significant | Poor |
| Cygnet Wwt Lagoon Wood County | 9 | 1994 | Significant | Satisfactory |
| Csonka Brothers Pond Dam Columbiana County | 24 | 1975 | Significant | Poor |
Data sourced from the National Inventory of Dams (NID). Hazard classification reflects potential consequences of failure, not the likelihood of failure.