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 1126–1150 of 1,377
| Dam Name | Height (ft) | Year | Hazard | Condition |
|---|---|---|---|---|
| Shugert Lane Dam Guernsey County | 25 | — | Significant | Satisfactory |
| Sidney Lime Sludge Lagoon Shelby County | 16 | 1978 | Significant | Fair |
| Siedel Lake Dam Medina County | 39 | 1968 | High | Fair |
| Siemer Pond Dam Perry County | 29 | 1944 | Significant | Fair |
| Sili Lake Dam Ashtabula County | 15 | 1972 | Low | Poor |
| Silver Creek Dam Madison County | 44 | 1968 | Significant | Satisfactory |
| Silver Creek Lake Dam Summit County | 25 | 1990 | High | Satisfactory |
| Simco-Peabody Sediment Pond E-1 Dam Muskingum County | 32 | 1982 | Undetermined | Not Rated |
| Simco-Peabody Sediment Pond No. 28 Dam Muskingum County | 26 | 1984 | Significant | Poor |
| Simco Sediment Pond E-55 Dam Coshocton County | 34 | 1989 | Low | Satisfactory |
| Slate Run Metro Park Dam Pickaway County | 15 | 1993 | Low | Satisfactory |
| Slates Lake Dam Columbiana County | 28 | 1967 | Significant | Poor |
| Slifko Pond Dam Wayne County | 17 | 1999 | Low | Satisfactory |
| Smith-Lin Lake Dam Franklin County | 37 | 1933 | Undetermined | Not Rated |
| Snortin Ridge Farm Lake Dam Fairfield County | 57 | 1964 | Significant | Satisfactory |
| Snow Hill INC. Lake Dam Clinton County | 24 | 1969 | Significant | Fair |
| Snyder'S Horse Farm Pond Dam Tuscarawas County | 25 | 1961 | Low | Poor |
| 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 |
| Southern Silica Pond No. 2 Dam Ross County | 38 | 1956 | High | Poor |
| South Montgomery County Low Dam Montgomery County | 11 | 1988 | Significant | Satisfactory |
| South Sedimentation Basin Dam Perry County | 22 | 1991 | Low | Fair |
| South Vienna Wwt Lagoons Clark County | 26 | 1992 | Significant | Fair |
| Sparrow Reservoir Dam Harrison County | 33 | 1949 | Low | Poor |
Data sourced from the National Inventory of Dams (NID). Hazard classification reflects potential consequences of failure, not the likelihood of failure.