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 901–925 of 1,377
| Dam Name | Height (ft) | Year | Hazard | Condition |
|---|---|---|---|---|
| Hayes Lake Dam Cuyahoga County | 45 | 1968 | Significant | Fair |
| Hawthorne Valley Country Club Lake Dam Cuyahoga County | 31 | — | Low | Fair |
| Havens Lake Dam Delaware County | 38 | 1980 | Low | Fair |
| Harvey'S Lake Dam Geauga County | 19 | 1952 | Significant | Poor |
| Hartman Dam Huron County | 19 | 1972 | Low | Fair |
| Harrison Lake Dam Fulton County | 35 | 1941 | Significant | Poor |
| Harpersfield Low Head Dam Ashtabula County | 9 | 1913 | Undetermined | Not Rated |
| Harper Pond Dam Warren County | 28 | 1956 | Undetermined | Not Rated |
| Harper Lake Dam Fairfield County | 19 | 1971 | Low | Fair |
| Harmony Lake Dam Wayne County | 14 | 1955 | Undetermined | Not Rated |
| Hargus Lake Dam Pickaway County | 66 | 1956 | High | Poor |
| Harding Area Council Bsa Dam Morrow County | 31 | 1973 | Low | Poor |
| Happy Hills Lake Dam Hocking County | 44 | 1954 | Significant | Poor |
| Hap Cremean Lowhead Dam Franklin County | 14 | 1953 | Significant | Satisfactory |
| Hap Cremean Lagoon #2 Franklin County | 12 | 2010 | Significant | Satisfactory |
| Hap Cremean Lagoon #1 Franklin County | 14 | 2011 | Significant | Satisfactory |
| Hankins Lake Dam Morrow County | 23 | 1966 | Low | Satisfactory |
| Hance Lake Dam Knox County | 28 | 1991 | Low | Fair |
| Hammond Lake Ii Dam Columbiana County | 17 | 1951 | Low | Poor |
| Hammond Lake Dam Pike County | 28 | — | Low | Poor |
| Hammertown Lake Dam Jackson County | 60 | 1954 | High | Poor |
| Hammerhead Lake Dam Warren County | 14 | 1955 | Low | Satisfactory |
| Hamilton Small Diversion Butler County | 8 | 1920 | Low | Satisfactory |
| Hamilton Low Dam Butler County | 9 | 1990 | Undetermined | Not Rated |
| Hamilton Lime Sludge Lagoon Butler County | 11 | 1992 | Significant | Fair |
Data sourced from the National Inventory of Dams (NID). Hazard classification reflects potential consequences of failure, not the likelihood of failure.