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 1326–1350 of 1,377
| Dam Name | Height (ft) | Year | Hazard | Condition |
|---|---|---|---|---|
| Weymouth Valley Lake No. 1 Dam Medina County | 14 | 1968 | Significant | Poor |
| Whispering Hills Recreation Lake Dam Holmes County | 23 | 1968 | Significant | Poor |
| White Lake Dam Clermont County | 26 | — | Low | Fair |
| White Turkey Lake Dam Ross County | 42 | 1968 | High | Fair |
| Wiemeyer Lake Dam Clermont County | 51 | 1986 | Significant | Fair |
| Wieser Lake Dam Allen County | 15 | 1870 | Low | Fair |
| Willard City Upground Reservoir Huron County | 65 | 1971 | High | Fair |
| Willard Lake Dam Huron County | 22 | 1955 | Low | Fair |
| William H. Harsha Dam Clermont County | 205 | 1973 | High | Not Available |
| Williams Lake Dam Champaign County | 26 | 1964 | Low | Poor |
| Williams Reservoir Allen County | 53 | 2012 | High | Satisfactory |
| Willis Lake Dam Highland County | 31 | 1995 | Low | Fair |
| Willoway Upground No. 5 Dam Lorain County | 12 | 1999 | High | Satisfactory |
| Willowbrook Lake Dam Clermont County | 23 | 1975 | High | Fair |
| Willowdale Lake Dam Stark County | 27 | 1924 | Significant | Fair |
| Willow Lake Dam Medina County | 28 | — | Significant | Fair |
| Wills Creek Dam Coshocton County | 87 | 1936 | High | Not Available |
| Wilmington Upground Reservoir No. 1 Clinton County | 19 | 1945 | High | Satisfactory |
| Wilmington Upground Reservoir No. 2 Clinton County | 31 | 1963 | High | Satisfactory |
| Winchester Lake Dam Adams County | 28 | 1953 | Low | Poor |
| Winchester Wwt Lagoon No. 2 Adams County | 25 | 2004 | Significant | Satisfactory |
| Winchester Wwt Lagoon No. 3 Adams County | 21 | 2004 | Significant | Satisfactory |
| Wingfoot Lake Dam Portage County | 14 | 1916 | Significant | Fair |
| Winton Woods Golf Course Lake "E" Dam Hamilton County | 50 | 1994 | Significant | Satisfactory |
| Winton Woods Sediment Retention Pond Hamilton County | 55 | 1995 | Significant | Fair |
Data sourced from the National Inventory of Dams (NID). Hazard classification reflects potential consequences of failure, not the likelihood of failure.