Dams in Jefferson County, New York
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 Rated | 24 | Hydroelectric | 1948 |
| Beebee Island Diversion Dam | Significant | Not Rated | 22 | Hydroelectric | 1931 |
| Sandy Hollow Dam | Significant | Not Rated | 16 | Hydroelectric | 1986 |
| Sewalls South Channel Dam | Significant | Not Rated | 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 Rated | 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 Rated | 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 Rated | 16 | Other | 1895 |
| Perch River Wildlife Refuge Dam | Low | Not Rated | 15 | Other | 1964 |
| Dexter North Channel Dam | Low | Fair | 14 | Hydroelectric | 1925 |
| Antwerp Dam #2 | Low | Not Rated | 13 | Water Supply | 1925 |
| Diamond Island Diversion Dam | Low | Not Rated | 13 | Hydroelectric | 1914 |
| Lucky Star Lake Dam | Low | Not Rated | 13 | Recreation | 1951 |
| Antwerp Village Dam | Low | Not Rated | 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 Rated | 11 | Other | |
| Stone Mills Dam 2 | Low | Not Rated | 11 | Other | 1989 |
| Watertown Dosing Station Dam | Low | Not Rated | 10 | Water Supply | 1917 |
| Carthage State Dam | Low | Not Rated | 8 | Navigation | 1854 |
| Swamp Road Dike | Low | Not Rated | 7 | Fish and Wildlife Pond | 1997 |
| Upper Perch River Dam | Low | Not Rated | 7 | Other | 1957 |