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 |
|---|---|---|---|---|
| Samanna Dam Warren County | 24 | 1992 | Significant | Fair |
| Sammis Station North Bottom Ash Pond Dam Jefferson County | 21 | — | Significant | Satisfactory |
| Sand Run Dam Hocking County | 25 | 1964 | Significant | Not Rated |
| Savannah Wwtp Lagoons Ashland County | 44 | 1996 | Significant | Satisfactory |
| Schrock Lake Dam Franklin County | 10 | 1965 | Significant | Fair |
| Scioto County Sludge Lagoon Scioto County | 46 | 1980 | Significant | Fair |
| Sedimentation Pond No. 1 Dam Clermont County | 28 | 2000 | Significant | Poor |
| Seleski Lake No. 2 Dam Harrison County | 39 | 1963 | Significant | Poor |
| Sevakeen Country Club Lake Dam Columbiana County | 17 | 1925 | Significant | Poor |
| Shadow Lake Dam Monroe County | 27 | — | Significant | Poor |
| Shady Grove Dam Jackson County | 16 | 1962 | Significant | Fair |
| Shangri-La Ski Club Lake Dam Geauga County | 25 | 1956 | Significant | Poor |
| Shore Lake Dam Champaign County | 18 | 1964 | Significant | Poor |
| Shugert Lane Dam Guernsey County | 25 | — | Significant | Satisfactory |
| Sidney Lime Sludge Lagoon Shelby County | 16 | 1978 | Significant | Fair |
| Siemer Pond Dam Perry County | 29 | 1944 | Significant | Fair |
| Silver Creek Dam Madison County | 44 | 1968 | Significant | Satisfactory |
| Simco-Peabody Sediment Pond No. 28 Dam Muskingum County | 26 | 1984 | Significant | Poor |
| Slates Lake Dam Columbiana County | 28 | 1967 | Significant | Poor |
| Snortin Ridge Farm Lake Dam Fairfield County | 57 | 1964 | Significant | Satisfactory |
| Snow Hill INC. Lake Dam Clinton County | 24 | 1969 | Significant | Fair |
| Somerset Reservoir Dam Perry County | 35 | 1941 | Significant | Poor |
| Somoco Wwt Lagoon Morrow County | 19 | 2000 | Significant | Fair |
| South Central Wwt Lagoon Williams County | 18 | 2011 | Significant | Satisfactory |
| South Montgomery County Low Dam Montgomery County | 11 | 1988 | Significant | Satisfactory |
Data sourced from the National Inventory of Dams (NID). Hazard classification reflects potential consequences of failure, not the likelihood of failure.