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 1–25 of 501
| Dam Name | Height (ft) | Year | Hazard | Condition |
|---|---|---|---|---|
| Zf Batavia Retention Basin Dam Clermont County | 22 | 1980 | Significant | Poor |
| Yount Pond Dam Trumbull County | 25 | 1965 | Significant | Poor |
| Youngstown Country Club Lake Dam Trumbull County | 15 | — | Significant | Poor |
| Workman Lake Dam Knox County | 30 | — | Significant | Poor |
| Work Lake No. 2 Dam Erie County | 29 | 1966 | Low | Poor |
| Woodsfield Reservoir Dam No. 3 Monroe County | 56 | 1992 | High | Poor |
| Woodmoor Dam #2 Stark County | 16 | 1978 | Significant | Poor |
| Woodmoor Dam #1 Stark County | 17 | 1978 | Significant | Poor |
| Woodland Lake Dam Columbiana County | 19 | 1948 | Significant | Poor |
| Woodland Altars Lake Dam Adams County | 25 | 1964 | Significant | Poor |
| Wolf Creek Dam Summit County | 43 | 1926 | High | Poor |
| Winchester Lake Dam Adams County | 28 | 1953 | Low | Poor |
| Williams Lake Dam Champaign County | 26 | 1964 | Low | Poor |
| Whispering Hills Recreation Lake Dam Holmes County | 23 | 1968 | Significant | Poor |
| Weymouth Valley Lake No. 1 Dam Medina County | 14 | 1968 | Significant | Poor |
| Westville Lake Dam Columbiana County | 29 | 1912 | Significant | Poor |
| West Branch Channel Dam Trumbull County | 16 | — | Low | Poor |
| Werrmann Lake Dam Warren County | 26 | — | Low | Poor |
| Werner Lake Dam Columbiana County | 19 | 1955 | Significant | Poor |
| Wellston Reservoir Dam Jackson County | 41 | 1920 | High | Poor |
| Wellington Reservoir No. 2 Dam Lorain County | 25 | 1928 | Significant | Poor |
| Wauseon Upground Reservoir No. 1 Fulton County | 29 | 1921 | Significant | Poor |
| Waterloo Coal Double-Cell Slurry Dam Jackson County | 34 | 1981 | Significant | Poor |
| Waterloo Coal Company Dam Jackson County | 19 | — | Low | Poor |
| Washington Co. Fish & Game Club Lake Dam Washington County | 18 | 1959 | Low | Poor |
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Data sourced from the National Inventory of Dams (NID). Hazard classification reflects potential consequences of failure, not the likelihood of failure.