Dams in Suffolk County, New York
15Total Dams
0High Hazard
4Significant
Dam Safety in Suffolk County, New York
Suffolk County has 15 dams tracked in the National Inventory of Dams. Another 4 carry a significant hazard classification. Currently, 3 dams have a condition assessment of poor or unsatisfactory.
The average dam in Suffolk County is 117 years old. The most common purpose is recreation. The tallest dam is New Mill Pond Dam at 15 ft.
Explore more: Oldest dams in New York · Tallest dams · High risk dams · Largest reservoirs
| Dam | Hazard | Condition | Height (ft) | Purpose | Year |
|---|---|---|---|---|---|
| Willow Pond Dam | Significant | Poor | 12 | Recreation | 1915 |
| Peconic River Sportsman Club Dam | Significant | Satisfactory | 11 | Other | 1925 |
| Phillips Mill Pond Dam | Significant | Poor | 10 | Recreation | 1850 |
| Lotus Lake Dam | Significant | Poor | 6 | Recreation | 1980 |
| New Mill Pond Dam | Low | Not Rated | 15 | Recreation | 1825 |
| Peconic Lake Dam | Low | Not Rated | 13 | Recreation | 1915 |
| Lower Lake Dam | Low | Not Rated | 12 | Recreation | 1940 |
| Great Patchogue Lake Dam | Low | Not Rated | 11 | Recreation | 1917 |
| Mill Pond Dam | Low | Not Rated | 11 | Other | 1920 |
| Belmont Lake Dam | Low | Not Rated | 9 | Recreation | 1905 |
| Upper Lake Dam | Low | Not Rated | 8 | Recreation | 1932 |
| Lefferts Grist Mill Dam | Low | Not Rated | 8 | Recreation | 1800 |
| Canaan Lake Dam | Low | Not Rated | 7 | Recreation | 1912 |
| Fresh Pond Dam | Low | Not Rated | 7 | Recreation | 1945 |
| Millers Pond Dam | Low | Not Rated | 7 | Recreation | 1940 |