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 351–375 of 421
| Dam Name | Height (ft) | Year | Hazard | Condition |
|---|---|---|---|---|
| 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 |
| Snow Hill INC. Lake Dam Clinton County | 24 | 1969 | Significant | Fair |
| Somoco Wwt Lagoon Morrow County | 19 | 2000 | Significant | Fair |
| South Sedimentation Basin Dam Perry County | 22 | 1991 | Low | Fair |
| South Vienna Wwt Lagoons Clark County | 26 | 1992 | Significant | Fair |
| Spencer Lake - North Dam Medina County | 14 | 1960 | Low | Fair |
| Spencer Lake - South Dam Medina County | 17 | 1960 | Significant | Fair |
| Spring Lake Dam Greene County | 29 | 1969 | Low | Fair |
| Springwood Lake Dam Stark County | 24 | 1989 | Low | Fair |
| Sproat Lake Dam Vinton County | 35 | 1962 | Significant | Fair |
| Squaw Valley Lake Dam Stark County | 18 | 1964 | Low | Fair |
| Stokes Lake Dam Clinton County | 17 | 1974 | Low | Fair |
| Stonegate Pond Dam Butler County | 21 | 1985 | High | Fair |
| Stonelick Lake Dam Clermont County | 35 | 1949 | High | Fair |
| Stoneybrook Farm Lake Dam Warren County | 45 | 1968 | Significant | Fair |
| Strahler'S Lake Dam Washington County | 29 | 1966 | Low | Fair |
| Strait'S Lake Dam Morrow County | 24 | 1965 | Significant | Fair |
| Sugar Hill Gun Club Lake Dam Clermont County | 14 | 1960 | Low | Fair |
| Sunbury Upground Reservoir No. 1 Delaware County | 17 | 1955 | High | Fair |
| Sunbury Upground Reservoir No. 2 Delaware County | 20 | 1964 | High | Fair |
| Sunny Lake Dam Portage County | 10 | — | Low | Fair |
| Swanton Upground Reservoir Lucas County | 24 | 1937 | Significant | Fair |
| Switzerland Lake Dam Belmont County | 54 | 1956 | Significant | Fair |
Data sourced from the National Inventory of Dams (NID). Hazard classification reflects potential consequences of failure, not the likelihood of failure.