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 1,377
| Dam Name | Height (ft) | Year | Hazard | Condition |
|---|---|---|---|---|
| Zupan Lake Dam Ashland County | 29 | 2000 | Low | Satisfactory |
| Zoldan Pond Dam Mahoning County | 31 | 2003 | Low | Satisfactory |
| Zion Lake Dam Harrison County | 37 | 1963 | Low | Fair |
| Zimmer Waste Water Pond Complex Dam Clermont County | 21 | 1989 | Significant | Fair |
| Zimber Ditch Detention Basin B Summit County | 17 | 2007 | High | Satisfactory |
| Zf Batavia Retention Basin Dam Clermont County | 22 | 1980 | Significant | Poor |
| Zepernick Lake Dam Columbiana County | 14 | 1950 | Significant | Satisfactory |
| Zanesville State Nursery Lake Dam Muskingum County | 32 | — | High | Fair |
| Yount Pond Dam Trumbull County | 25 | 1965 | Significant | Poor |
| Youngstown Upground Reservoir Mahoning County | 29 | 1929 | High | Fair |
| Youngstown Country Club Lake Dam Trumbull County | 15 | — | Significant | Poor |
| Yellow Creek Upground Reservoir Putnam County | 30 | 2006 | Significant | Satisfactory |
| Wright Farm West Detention Basin Dam Hamilton County | 26 | 1996 | High | Satisfactory |
| 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 Leisure Resort Dam Highland County | 26 | 1971 | Significant | Fair |
| Woodland Lake Dam Columbiana County | 19 | 1948 | Significant | Poor |
| Woodland Altars Lake Dam Adams County | 25 | 1964 | Significant | Poor |
| Woodcreek Lake Dam Clermont County | 30 | 1978 | Undetermined | Not Rated |
| Wong Lake Dam Guernsey County | 28 | — | Significant | Fair |
| Wolf Run Lake Dam Noble County | 76 | 1966 | High | Satisfactory |
| Wolf Lakes Dams Medina County | 29 | 1958 | Low | Satisfactory |
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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.