35Total Dams
0High Hazard
9Significant
Dam Safety in Jefferson County, New York
Jefferson County has 35 dams tracked in the National Inventory of Dams. Another 9 carry a significant hazard classification. Currently, 3 dams have a condition assessment of poor or unsatisfactory.
The average dam in Jefferson County is 94 years old. The most common purpose is hydroelectric. The tallest dam is Theresa at 40 ft.
Explore more: Oldest dams in New York · Tallest dams · High risk dams · Largest reservoirs
| Dam | Hazard | Condition | Height (ft) | Purpose | Year |
|---|---|---|---|---|---|
| Bear Creek Dam | Significant | Poor | 28 | Other | 1922 |
| Upper North Channel Dam | Significant | Not assessed | 24 | Hydroelectric | 1948 |
| Beebee Island Diversion Dam | Significant | Not assessed | 22 | Hydroelectric | 1931 |
| Sandy Hollow Dam | Significant | Not assessed | 16 | Hydroelectric | 1986 |
| Sewalls South Channel Dam | Significant | Not assessed | 16 | Hydroelectric | 1978 |
| Tannery - Dam "a" | Significant | Satisfactory | 14 | Hydroelectric | 1914 |
| Philadelphia - Nonoverflow Section | Significant | Satisfactory | 13 | Hydroelectric | 1910 |
| Watertown Municipal Power Dam | Significant | Not assessed | 12 | Hydroelectric | 1913 |
| Honeyville Marsh Dam | Significant | Poor | 8 | Recreation | 1957 |
| Theresa | Low | Satisfactory | 40 | Hydroelectric | 1929 |
| Beebee Island | Low | Satisfactory | 31 | Hydroelectric | 1931 |
| Fourth Street East Impoundment Dam | Low | Not assessed | 29 | Flood Risk Reduction | 1987 |
| Herrings | Low | Satisfactory | 25 | Hydroelectric | 1924 |
| Black River | Low | Satisfactory | 25 | Hydroelectric | 1919 |
| Dexter South Channel Dam | Low | Satisfactory | 22 | Hydroelectric | 1925 |
| Remington Pond | Low | Unsatisfactory | 20 | Recreation | 1923 |
| Deferiet | Low | Satisfactory | 18 | Hydroelectric | 1899 |
| West End Dam | Low | Satisfactory | 18 | Hydroelectric | 1905 |
| Dexter Middle Channel Dam | Low | Satisfactory | 18 | Hydroelectric | 1925 |
| Pump House Dam | Low | Not assessed | 16 | Other | 1895 |
| Perch River Wildlife Refuge Dam | Low | Not assessed | 15 | Other | 1964 |
| Dexter North Channel Dam | Low | Fair | 14 | Hydroelectric | 1925 |
| Antwerp Dam #2 | Low | Not assessed | 13 | Water Supply | 1925 |
| Diamond Island Diversion Dam | Low | Not assessed | 13 | Hydroelectric | 1914 |
| Lucky Star Lake Dam | Low | Not assessed | 13 | Recreation | 1951 |
| Antwerp Village Dam | Low | Not assessed | 12 | Water Supply | 1909 |
| Delano Island | Low | Satisfactory | 12 | Hydroelectric | 1924 |
| Kamargo | Low | Satisfactory | 12 | Hydroelectric | 1920 |
| Indian Falls | Low | Satisfactory | 12 | Hydroelectric | 1905 |
| La Fargeville Dam | Low | Not assessed | 11 | Other | |
| Stone Mills Dam 2 | Low | Not assessed | 11 | Other | 1989 |
| Watertown Dosing Station Dam | Low | Not assessed | 10 | Water Supply | 1917 |
| Carthage State Dam | Low | Not assessed | 8 | Navigation | 1854 |
| Swamp Road Dike | Low | Not assessed | 7 | Fish and Wildlife Pond | 1997 |
| Upper Perch River Dam | Low | Not assessed | 7 | Other | 1957 |