Dams in Lewis County, New York
15Total Dams
3High Hazard
1Significant
| Dam | Hazard | Condition | Height (ft) | Purpose | Year |
|---|---|---|---|---|---|
| High Falls | High | Satisfactory | 50 | Hydroelectric | 1925 |
| Upper Beaver Falls | High | Satisfactory | 27 | Hydroelectric | 1937 |
| Effley Intake | High | Satisfactory | 26 | Hydroelectric | 1902 |
| Taylorville - South Dam | Significant | Satisfactory | 23 | Hydroelectric | 1914 |
| Port Leyden | Low | Satisfactory | 32 | Hydroelectric | 1983 |
| Denley | Low | Satisfactory | 29 | Hydroelectric | 1912 |
| Harrisville | Low | Satisfactory | 25 | Hydroelectric | 1905 |
| Elmer | Low | Satisfactory | 23 | Hydroelectric | 1917 |
| Eagle | Low | Satisfactory | 22 | Hydroelectric | 1915 |
| Belfort | Low | Satisfactory | 19 | Hydroelectric | 1904 |
| Rock Island | Low | Satisfactory | 18 | Hydroelectric | 1984 |
| Soft Maple Spillway | Low | Satisfactory | 15 | Hydroelectric | 1926 |
| Gouldtown - Mill 5 West Channel | Low | Satisfactory | 15 | Hydroelectric | 1915 |
| Lyons Falls - Mill 3 | Low | Satisfactory | 10 | Hydroelectric | 1922 |
| Lyonsdale - Dam No. 2 | Low | Satisfactory | 9 | Hydroelectric | 1935 |