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 421
| Dam Name | Height (ft) | Year | Hazard | Condition |
|---|---|---|---|---|
| Zion Lake Dam Harrison County | 37 | 1963 | Low | Fair |
| Zimmer Waste Water Pond Complex Dam Clermont County | 21 | 1989 | Significant | Fair |
| Zanesville State Nursery Lake Dam Muskingum County | 32 | — | High | Fair |
| Youngstown Upground Reservoir Mahoning County | 29 | 1929 | High | Fair |
| Woodland Lake Leisure Resort Dam Highland County | 26 | 1971 | Significant | Fair |
| Wong Lake Dam Guernsey County | 28 | — | Significant | Fair |
| Wolfden Lake Dam Scioto County | 27 | 1936 | High | Fair |
| Winton Woods Sediment Retention Pond Hamilton County | 55 | 1995 | Significant | Fair |
| Wingfoot Lake Dam Portage County | 14 | 1916 | Significant | Fair |
| Willow Lake Dam Medina County | 28 | — | Significant | Fair |
| Willowdale Lake Dam Stark County | 27 | 1924 | Significant | Fair |
| Willowbrook Lake Dam Clermont County | 23 | 1975 | High | Fair |
| Willis Lake Dam Highland County | 31 | 1995 | Low | Fair |
| Willard Lake Dam Huron County | 22 | 1955 | Low | Fair |
| Willard City Upground Reservoir Huron County | 65 | 1971 | High | Fair |
| Wieser Lake Dam Allen County | 15 | 1870 | Low | Fair |
| Wiemeyer Lake Dam Clermont County | 51 | 1986 | Significant | Fair |
| White Turkey Lake Dam Ross County | 42 | 1968 | High | Fair |
| White Lake Dam Clermont County | 26 | — | Low | Fair |
| Wetherall Lake Dam Fairfield County | 25 | 1956 | Low | Fair |
| West Mansfield Wwt Lagoon Logan County | 10 | 1997 | Significant | Fair |
| Wellington Upground Reservoir Lorain County | 35 | 1972 | High | Fair |
| Wauseon Upground Reservoir No. 2 Fulton County | 26 | 1934 | High | Fair |
| Water'S Edge Dam Warren County | 23 | 1994 | Low | Fair |
| Wasmer Lake Dam Hamilton County | 27 | 1960 | Low | Fair |
Page 1 of 17Next
Data sourced from the National Inventory of Dams (NID). Hazard classification reflects potential consequences of failure, not the likelihood of failure.