Dams in Westchester County, New York
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 Rated | 57 | Water Supply | 1906 |
| Long Pond Dam | Significant | Poor | 40 | Recreation | 1936 |
| Town Of Mt. Pleasant Water District #1 Dam | Significant | Not Rated | 35 | Water Supply | 1915 |
| Baxter Preserve Pond Dam | Significant | Not Rated | 30 | Recreation | 1948 |
| Lake Dark Hollow Dam | Significant | Fair | 28 | Water Supply | 1913 |
| Reservoir #2 Dam | Significant | Not Rated | 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 Rated | 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 Rated | 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 Rated | 15 | Fire Protection, Stock, Or Small Fish Pond | 1965 |
| Summit Lake Dam And Dike | Significant | Poor | 15 | Recreation | 1992 |
| Campfire Lake Dam | Significant | Not Rated | 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 Rated | 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 Rated | 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 Rated | 7 | Water Supply | 1915 |
| South Westchester Detention Basin Dam | Significant | Poor | 7 | Other | 1978 |
| Spruce Lake Dam | Low | Not Rated | 20 | Recreation | |
| Hampshire Country Club Dam | Low | Not Rated | 15 | Other | |
| Mahstedt Reservoir Dam | Low | Not Rated | 15 | Recreation | 1885 |
| Truesdale Lake Dam | Low | Not Rated | 14 | Recreation | 1925 |
| Blue Lake Dam | Low | Not Rated | 13 | Recreation | |
| Vernay Lake Dam | Low | Not Rated | 12 | ||
| Mallard Lake Dam | Low | Not Rated | 11 | Recreation | 1939 |
| Hollowbrook Golf Club Pond #2 Dam | Low | Not Rated | 11 | Irrigation | 2003 |
| Premium Mill Pond Dam | Low | Not Rated | 11 | Recreation | |
| Amawalk Lake North Dam | Low | Not Rated | 11 | Water Supply | 1972 |
| Oakridge Land & Property Corp Dam | Low | Not Rated | 10 | Recreation | 1981 |
| Dann Farm Subdivision Dam | Low | Not Rated | 8 | Flood Risk Reduction | |
| Hemlock Lake Dam | Low | Not Rated | 8 | Recreation | |
| Broccy Creek Dam | Low | Not Rated | 7 | Other | 1990 |