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 101–125 of 339
| Dam Name | Height (ft) | Year | Hazard | Condition |
|---|---|---|---|---|
| Greene Co. Fish & Game Pond No. 1 Dam Greene County | 28 | 1954 | Low | Fair |
| Green Lake Dam Logan County | 25 | 2002 | Low | Satisfactory |
| Grenke Lake Dam Ashtabula County | 16 | — | Low | Poor |
| Grogg Lake Dam Richland County | 17 | 2001 | Low | Fair |
| Grubb Lake Dam Licking County | 21 | 1974 | Low | Poor |
| Gund Pond No. 1 Dam Summit County | 36 | 1970 | Low | Poor |
| Gund Pond No. 2 Dam Summit County | 26 | 1970 | Low | Poor |
| Halls Lake Dam Preble County | 13 | 1935 | Low | Poor |
| Hamilton Fairfield Airport Dam Butler County | 16 | 1995 | Low | Fair |
| Hamilton Small Diversion Butler County | 8 | 1920 | Low | Satisfactory |
| Hammerhead Lake Dam Warren County | 14 | 1955 | Low | Satisfactory |
| Hammond Lake Dam Pike County | 28 | — | Low | Poor |
| Hammond Lake Ii Dam Columbiana County | 17 | 1951 | Low | Poor |
| Hance Lake Dam Knox County | 28 | 1991 | Low | Fair |
| Hankins Lake Dam Morrow County | 23 | 1966 | Low | Satisfactory |
| Harding Area Council Bsa Dam Morrow County | 31 | 1973 | Low | Poor |
| Harper Lake Dam Fairfield County | 19 | 1971 | Low | Fair |
| Hartman Dam Huron County | 19 | 1972 | Low | Fair |
| Havens Lake Dam Delaware County | 38 | 1980 | Low | Fair |
| Hawthorne Valley Country Club Lake Dam Cuyahoga County | 31 | — | Low | Fair |
| Hay Hollow Reservoir Dam Pike County | 34 | 1952 | Low | Fair |
| Herbert Pond Dam Coshocton County | 26 | 1979 | Low | Fair |
| Hetrick Lake Dam Muskingum County | 29 | — | Low | Satisfactory |
| Hickory Hollow Lake Dam Guernsey County | 32 | 1969 | Low | Fair |
| Hickory Lake Dam Holmes County | 39 | 1967 | Low | Fair |
Data sourced from the National Inventory of Dams (NID). Hazard classification reflects potential consequences of failure, not the likelihood of failure.