91Total Dams
36High Hazard
41Significant
Dam Safety in Westchester County, New York
Westchester County has 91 dams tracked in the National Inventory of Dams. Of these, 36 are classified as high hazard — meaning failure would probably cause loss of human life. Another 41 carry a significant hazard classification. Currently, 34 dams have a condition assessment of poor or unsatisfactory.
The average dam in Westchester County is 99 years old. The most common purpose is recreation. The tallest dam is New Croton Reservoir Dam at 174 ft.
Explore more: Oldest dams in New York · Tallest dams · High risk dams · Largest reservoirs
| Dam | Hazard | Condition | Height (ft) | Purpose | Year |
|---|---|---|---|---|---|
| New Croton Reservoir Dam | High | Satisfactory | 174 | Water Supply | 1906 |
| Kensico Dam | High | Satisfactory | 168 | Water Supply | 1916 |
| Cross River Dam | High | Satisfactory | 126 | Water Supply | 1908 |
| Titicus Dam | High | Satisfactory | 109 | Water Supply | 1895 |
| Mill River Dam | High | Satisfactory | 100 | Water Supply | 1966 |
| Hillview Reservoir Dam | High | Satisfactory | 90 | Water Supply | 1915 |
| Amawalk Dam | High | Satisfactory | 85 | Water Supply | 1897 |
| Trinity Dam | High | Satisfactory | 50 | Water Supply | 1966 |
| Browns Reservoir Dam | High | Satisfactory | 48 | Water Supply | 1924 |
| Indian Brook Reservoir Dam | High | Satisfactory | 43 | Water Supply | 1889 |
| Grassy Sprain Reservoir Dam | High | Satisfactory | 40 | Recreation | 1876 |
| Cortlandt Lake Dam | High | Satisfactory | 37 | Recreation | 1929 |
| Pocantico Lake Dam | High | Satisfactory | 35 | Other | 1916 |
| White Plains Reservoir #2 Dam | High | Satisfactory | 35 | Water Supply | 1907 |
| Swan Lake Dam | High | Poor | 34 | Recreation | 1933 |
| North Lake Dam | High | Satisfactory | 32 | Recreation | 1936 |
| Blind Brook Club Dam | High | Poor | 32 | Irrigation | 1959 |
| Larchmont Water Company Dam #2 | High | Poor | 31 | Recreation | 1935 |
| New Rochelle Reservoir #3 Dam | High | Poor | 30 | Recreation | 1908 |
| New Rochelle Reservoir #1 Dam | High | Poor | 30 | Recreation | 1894 |
| Byram Lake Reservoir Dam | High | Poor | 27 | Water Supply | |
| Windmill Lake Dam | High | Satisfactory | 26 | Recreation | 1935 |
| Paterno Dam | High | Satisfactory | 25 | Recreation | 1950 |
| Halsey Pond Dam | High | Fair | 25 | Recreation | |
| White Plains Reservoir #1 Dam | High | Satisfactory | 25 | Water Supply | 1900 |
| Furnace Brook Lake Dam | High | Satisfactory | 24 | Recreation | 1913 |
| Lake Lincolndale Dam | High | Poor | 22 | Recreation | 1935 |
| Irvington Water Works Dam | High | Poor | 20 | Other | 1900 |
| Mamaroneck Reservoir Dam | High | Poor | 19 | Flood Risk Reduction | 1928 |
| Minkel Dam | High | Satisfactory | 18 | Recreation | 1929 |
| Tarrytown Waterworks Dam | High | Poor | 18 | Water Supply | 1897 |
| Still Lake Dam | High | Poor | 16 | Recreation | 1930 |
| Croton Road Dam and Dike | High | Poor | 15 | ||
| Forest Lake Dam | High | Satisfactory | 12 | Flood Risk Reduction | 1996 |
| Westchester Lake Dam | High | Poor | 10 | Recreation | 1920 |
| Sparkle Lake Dam | High | Satisfactory | 10 | Recreation | 1940 |
| Muscoot Dam | Significant | Not assessed | 57 | Water Supply | 1906 |
| Long Pond Dam | Significant | Poor | 40 | Recreation | 1936 |
| Town of Mt. Pleasant Water District #1 Dam | Significant | Not assessed | 35 | Water Supply | 1915 |
| Baxter Preserve Pond Dam | Significant | Not assessed | 30 | Recreation | 1948 |
| Lake Dark Hollow Dam | Significant | Fair | 28 | Water Supply | 1913 |
| Reservoir #2 Dam | Significant | Not assessed | 25 | Other | 1892 |
| Scotts Reservoir Dam | Significant | Poor | 23 | Water Supply | 1883 |
| Bowman Ave Dam | Significant | Poor | 22 | Flood Risk Reduction | 1941 |
| Beechmont Lake Dam | Significant | Poor | 21 | Recreation | 1904 |
| Ibm Corp Technical Institute Dam | Significant | Satisfactory | 21 | Flood Risk Reduction | 1985 |
| Chimney Corners Dam | Significant | Poor | 20 | Recreation | |
| Woodlands Lake Dam | Significant | Not assessed | 20 | Recreation | 1840 |
| Chiselhurst Dam | Significant | Poor | 20 | Recreation | 1921 |
| Murray Hill Estates Dam | Significant | Poor | 20 | Other | 1979 |
| Spring Lake Dam | Significant | Poor | 20 | Recreation | 1895 |
| Howlands Lake Dam | Significant | Poor | 18 | Recreation | 1895 |
| M C Whatmore Lake Dam | Significant | Not assessed | 17 | Recreation | 1964 |
| Carpenter Pond Dam | Significant | Poor | 16 | Other | 1925 |
| Hollowbrook Dam | Significant | Poor | 15 | Hydroelectric | 1920 |
| Dickerson Pond Dam | Significant | Poor | 15 | Recreation | 1922 |
| Pine Lake Dam | Significant | Satisfactory | 15 | Recreation | |
| Petersons Pond Dam | Significant | Satisfactory | 15 | Recreation | |
| Lounsbury Pond Dam | Significant | Satisfactory | 15 | Recreation | 1919 |
| Blue Heron Lake Dam | Significant | Poor | 15 | Recreation | 1936 |
| Upper Lounsbury Pond Dam | Significant | Satisfactory | 15 | Recreation | |
| Sleepy Hollow Country Club Dam | Significant | Not assessed | 15 | Fire Protection, Stock, Or Small Fish Pond | 1965 |
| Summit Lake Dam and Dike | Significant | Poor | 15 | Recreation | 1992 |
| Campfire Lake Dam | Significant | Not assessed | 14 | Recreation | 1920 |
| Rye Brook Estates Dam | Significant | Satisfactory | 14 | Recreation | |
| Paine Lake Dam | Significant | Poor | 13 | Recreation | 1890 |
| Pine Lake Park Dam | Significant | Poor | 12 | Recreation | |
| Ferguson Lake Dam | Significant | Not assessed | 12 | Water Supply | 1915 |
| Glenwood Lake Dam | Significant | Poor | 12 | Recreation | |
| Larchmont Dam | Significant | Poor | 10 | Other | 1925 |
| Teatown Lake Dam | Significant | Fair | 10 | Other | 1928 |
| Wampus Lake Reservoir Dam | Significant | Poor | 10 | Recreation | 1940 |
| Town of Mt. Pleasant Water District #2 Dam | Significant | Not assessed | 10 | Water Supply | 1915 |
| Crestwood Lake Dam | Significant | Satisfactory | 10 | Other | 1995 |
| Silver Lake Dam | Significant | Poor | 9 | Recreation | 1815 |
| Town of Mt. Pleasant Water District #3 Dam | Significant | Not assessed | 7 | Water Supply | 1915 |
| South Westchester Detention Basin Dam | Significant | Poor | 7 | Other | 1978 |
| Spruce Lake Dam | Low | Not assessed | 20 | Recreation | |
| Hampshire Country Club Dam | Low | Not assessed | 15 | Other | |
| Mahstedt Reservoir Dam | Low | Not assessed | 15 | Recreation | 1885 |
| Truesdale Lake Dam | Low | Not assessed | 14 | Recreation | 1925 |
| Blue Lake Dam | Low | Not assessed | 13 | Recreation | |
| Vernay Lake Dam | Low | Not assessed | 12 | ||
| Mallard Lake Dam | Low | Not assessed | 11 | Recreation | 1939 |
| Hollowbrook Golf Club Pond #2 Dam | Low | Not assessed | 11 | Irrigation | 2003 |
| Premium Mill Pond Dam | Low | Not assessed | 11 | Recreation | |
| Amawalk Lake North Dam | Low | Not assessed | 11 | Water Supply | 1972 |
| Oakridge Land & Property Corp Dam | Low | Not assessed | 10 | Recreation | 1981 |
| Dann Farm Subdivision Dam | Low | Not assessed | 8 | Flood Risk Reduction | |
| Hemlock Lake Dam | Low | Not assessed | 8 | Recreation | |
| Broccy Creek Dam | Low | Not assessed | 7 | Other | 1990 |