Dams in Mahoning County, Ohio
21Total Dams
7High Hazard
6Significant
Dam Safety in Mahoning County, Ohio
Mahoning County has 21 dams tracked in the National Inventory of Dams. Of these, 7 are classified as high hazard — meaning failure would probably cause loss of human life. Another 6 carry a significant hazard classification. Currently, 8 dams have a condition assessment of poor or unsatisfactory.
The average dam in Mahoning County is 93 years old. The most common purpose is recreation. The tallest dam is Berlin Dam at 96 ft.
Explore more: Oldest dams in Ohio · Tallest dams · High risk dams · Largest reservoirs
| Dam | Hazard | Condition | Height (ft) | Purpose | Year |
|---|---|---|---|---|---|
| Berlin Dam | High | Not Available | 96 | Flood Risk Reduction | 1943 |
| Mckelvey Lake Dam | High | Fair | 77 | Water Supply | 1926 |
| Lake Hamilton Dam | High | Poor | 70 | Recreation | 1905 |
| Lake Milton Dam | High | Poor | 53 | Recreation | 1916 |
| Evans Lake Dam | High | Fair | 49 | Water Supply | 1948 |
| Youngstown Upground Reservoir | High | Fair | 29 | Water Supply | 1929 |
| Pine Lake Dam | High | Satisfactory | 16 | Water Supply | 1911 |
| Arrowhead Lake Dam No. 1 | Significant | Fair | 30 | Recreation | 1952 |
| Newport Lake Dam | Significant | Satisfactory | 28 | Recreation | 1928 |
| Burgess Lake Dam | Significant | Poor | 27 | Water Supply | 1915 |
| Lake Cohasset Dam | Significant | Poor | 25 | Recreation | 1897 |
| Thompson Lake Dam | Significant | Poor | 14 | Recreation | |
| Mike Lake Dam | Significant | Poor | 11 | Recreation | 1958 |
| Zoldan Pond Dam | Low | Satisfactory | 31 | Recreation | 2003 |
| Lake Glacier Dam | Low | Fair | 24 | Recreation | 1905 |
| King's Lake Dam | Low | Poor | 14 | Recreation | 1957 |
| Lake Park Dam | Low | Poor | 12 | Recreation | 1900 |
| Rock Island Lake Dam | Undetermined | Not Rated | 34 | Recreation | 1964 |
| Lower Diehl Lake Dam | Undetermined | Not Rated | 27 | Recreation | 1930 |
| Usx Corporation Low Head Dam | Undetermined | 10 | Water Supply | ||
| Mayfield Lake Dam | Undetermined | 9 | Recreation |