132Total Dams
14High Hazard
33Significant
Dam Safety in Sullivan County, New York
Sullivan County has 132 dams tracked in the National Inventory of Dams. Of these, 14 are classified as high hazard — meaning failure would probably cause loss of human life. Another 33 carry a significant hazard classification. Currently, 17 dams have a condition assessment of poor or unsatisfactory.
The average dam in Sullivan County is 91 years old. The most common purpose is recreation. The tallest dam is Neversink Reservoir Dam at 190 ft.
Explore more: Oldest dams in New York · Tallest dams · High risk dams · Largest reservoirs
| Dam | Hazard | Condition | Height (ft) | Purpose | Year |
|---|---|---|---|---|---|
| Neversink Reservoir Dam | High | Satisfactory | 190 | Water Supply | 1953 |
| Swinging Bridge | High | Fair | 135 | Hydroelectric | 1930 |
| Toronto | High | Unsatisfactory | 103 | Hydroelectric | 1926 |
| Rio | High | Fair | 101 | Hydroelectric | 1927 |
| Mongaup | High | Fair | 45 | Hydroelectric | 1925 |
| Cliff Lake | High | Satisfactory | 36 | Hydroelectric | 1930 |
| Pleasure Lake Dam | High | Satisfactory | 35 | Recreation | 1875 |
| White Crane Lake Dam | High | Satisfactory | 29 | Recreation | 2005 |
| Toasperns Pond Dam | High | Fair | 27 | Recreation | 1940 |
| Lake Louise Marie Dam | High | Satisfactory | 25 | Recreation | 1912 |
| Yankee Lake Dam | High | Satisfactory | 22 | Recreation | 1844 |
| St Josephs Lake Dam | High | Satisfactory | 22 | Recreation | 1905 |
| Wanaksink Lake Dam | High | Satisfactory | 22 | Recreation | 1852 |
| Lake Jefferson | High | Unsatisfactory | 22 | Hydroelectric | 1927 |
| Mogisca Lake Dam | Significant | Not assessed | 36 | Recreation | 1976 |
| Swan Lake Dam | Significant | Fair | 31 | Recreation | 1894 |
| Triple L Lake Dam | Significant | Not assessed | 30 | Recreation | 1966 |
| Hemlock Lake Dam | Significant | Poor | 27 | Recreation | 1890 |
| Sunrise Lake Dam | Significant | Poor | 26 | Recreation | 1965 |
| Edgewood Lake Upper Dam | Significant | Satisfactory | 19 | Recreation | 1955 |
| Beaver Dam Pond Dam | Significant | Satisfactory | 19 | Recreation | 1820 |
| Lake La Barr Dam | Significant | Satisfactory | 18 | Recreation | 1964 |
| Tennanah Lake Dam | Significant | Poor | 17 | Recreation | 1914 |
| Fred Katz Pond Dam | Significant | Not assessed | 17 | Recreation | 1961 |
| Tanzman Lake Dam | Significant | Poor | 17 | Recreation | 1950 |
| Orchard Lake Dam | Significant | Poor | 16 | Recreation | 1870 |
| Grossingers Lake Dam | Significant | Not assessed | 15 | Recreation | 1950 |
| Edgewood Lake Lower Dam | Significant | Poor | 15 | Recreation | 1945 |
| Camp Gan Israel Pond Dam | Significant | Fair | 15 | Recreation | 1952 |
| Silver Lake Dam | Significant | Not assessed | 14 | Water Supply | 1850 |
| Paramount Pond Dam | Significant | Poor | 13 | Recreation | 1947 |
| Gordon Dam | Significant | Not assessed | 12 | Recreation | 1938 |
| Nimrod Lake Dam | Significant | Poor | 12 | Recreation | |
| Coon Rock Rod and Gun Club Dam | Significant | Poor | 12 | Recreation | |
| Sidwell Lake Dam | Significant | Poor | 11 | Recreation | |
| Wurtsboro Hills Dam | Significant | Poor | 10 | Recreation | 1948 |
| Merriewold Lake Dam | Significant | Poor | 10 | Recreation | 1914 |
| Evans Dam | Significant | Fair | 10 | Recreation | 1900 |
| Turcos Dam | Significant | Poor | 10 | Recreation | 1931 |
| Holcomb Pond Dam | Significant | Not assessed | 10 | Recreation | 1933 |
| Groos Pond Dam | Significant | Poor | 10 | Flood Risk Reduction | 1940 |
| Cramer-reichman Dam | Significant | Poor | 9 | Recreation | 1930 |
| Silver Lake Dam | Significant | Fair | 8 | Recreation | |
| Rock Lake Dam | Significant | Not assessed | 7 | Recreation | 1960 |
| Treasure Lake Dam | Significant | Not assessed | 7 | Recreation | 1911 |
| Stump Pond Dam | Significant | Not assessed | 6 | Recreation | 1888 |
| Davis Pond Dam | Significant | Not assessed | 5 | Recreation | 1930 |
| Old Brodhead Lake Dam | Low | Not assessed | 33 | Recreation | 2005 |
| Hillside Pond Dam | Low | Not assessed | 32 | Recreation | 1995 |
| Lake Nityananda Dam | Low | Not assessed | 25 | Recreation | 1994 |
| Weiden Lake Dam | Low | Not assessed | 25 | Recreation | 1920 |
| Hust Pond Dam | Low | Not assessed | 23 | Recreation | 1911 |
| Matawa Lake Dam | Low | Not assessed | 22 | Water Supply | 1949 |
| Lebanon Lake Dam | Low | Not assessed | 20 | Recreation | 1926 |
| Wildwood Lake Dam | Low | Not assessed | 20 | Recreation | 1940 |
| Wildcat Dam | Low | Not assessed | 20 | Recreation | 1928 |
| Lenape Lake Dam | Low | Not assessed | 20 | Recreation | 1920 |
| Burnt Hope Dam | Low | Not assessed | 19 | Recreation | 1956 |
| Thunder View Farms Dam | Low | Not assessed | 19 | Fire Protection, Stock, Or Small Fish Pond | 1992 |
| Lincoln Farms Dam | Low | Not assessed | 19 | Fire Protection, Stock, Or Small Fish Pond | 1976 |
| Sunset Lake Dam | Low | Not assessed | 18 | Recreation | |
| Kabau Lake Dam | Low | Not assessed | 18 | Recreation | 1940 |
| Hull Pond Dam | Low | Not assessed | 18 | Recreation | 1925 |
| Adams Pond Dam (163-0204) | Low | Not assessed | 18 | Recreation | 1923 |
| Petrillo Lake Dam | Low | Not assessed | 17 | Recreation | 1952 |
| Lake Muskoday Dam | Low | Satisfactory | 17 | Recreation | 1925 |
| Buck Ridge Rod & Gun Club Dam | Low | Not assessed | 17 | Fire Protection, Stock, Or Small Fish Pond | 1988 |
| Mountaindale Recreation Lake Dam | Low | Not assessed | 16 | Recreation | 1973 |
| Trojan Lake Dam | Low | Not assessed | 16 | Recreation | 1930 |
| Stephen Crane Dam | Low | Not assessed | 15 | Recreation | 1850 |
| MUD Pond Dam | Low | Not assessed | 15 | Recreation | 1915 |
| Toronto Lake Dam | Low | Not assessed | 15 | Recreation | |
| Trout Lake Dam | Low | Not assessed | 15 | Recreation | 1920 |
| Balsam Pond Dam | Low | Not assessed | 15 | Recreation | 1958 |
| Twin Ponds Dam - Lower | Low | Not assessed | 15 | Recreation | |
| Waneta Lake Dam | Low | Not assessed | 14 | Recreation | 1992 |
| Evers Lake Dam | Low | Not assessed | 14 | Recreation | 1965 |
| Albert Pines Pond Dam | Low | Not assessed | 13 | Recreation | 1963 |
| Camp Shomria Dam | Low | Not assessed | 13 | Recreation | 1975 |
| Pine Lake Dam | Low | Not assessed | 13 | Recreation | |
| Kenoza Lake Dam | Low | Not assessed | 13 | Recreation | 1843 |
| Lochada Lake Dam | Low | Not assessed | 13 | Recreation | 1960 |
| Welmet Lake Dam | Low | Not assessed | 13 | Recreation | 1900 |
| Wasserlauf Dam | Low | Not assessed | 12 | Recreation | 1954 |
| Filippini Pond Dam | Low | Not assessed | 12 | Recreation | 1937 |
| Lake Uncas Dam | Low | Not assessed | 12 | Recreation | 1940 |
| Delaware Hunting Club Dam | Low | Not assessed | 12 | Recreation | |
| Timber Estates Dam | Low | Not assessed | 12 | Recreation | |
| Boniface Dam | Low | Not assessed | 12 | Recreation | 1970 |
| Hilldale Pond Dam | Low | Not assessed | 12 | Recreation | 1910 |
| Highland Field and Stream Club Inc Dam | Low | Not assessed | 12 | Other | 1986 |
| Fred Denman Lake Dam | Low | Not assessed | 12 | Recreation | 1954 |
| Gordon White Pond Dam | Low | Not assessed | 11 | Recreation | |
| Fred Meyer Dam and Dike | Low | Not assessed | 11 | Recreation | 1974 |
| Paul Kellam Pond Dam | Low | Not assessed | 11 | Recreation | |
| Turnpike Pond Dam | Low | Not assessed | 11 | Recreation | 1930 |
| Briscoe Lake Dam | Low | Not assessed | 11 | Recreation | 1828 |
| Melody Lake Dam | Low | Not assessed | 10 | Recreation | |
| Knickerbocker Pond Dam | Low | Not assessed | 10 | Recreation | 2006 |
| Howard Stewart Dam | Low | Not assessed | 10 | Recreation | |
| Black Lake Dam | Low | Not assessed | 10 | Flood Risk Reduction | 1917 |
| Kazens Pond Dam | Low | Not assessed | 10 | Recreation | 1950 |
| Morningside Lake Dam | Low | Not assessed | 10 | Recreation | 1945 |
| Lower Lake Metaugue Dam | Low | Not assessed | 10 | Recreation | 1960 |
| Monticello Hunting Club Dam | Low | Not assessed | 10 | Recreation | |
| Davies Lake Dam | Low | Not assessed | 10 | Recreation | 1956 |
| Dixie Lake Dam | Low | Not assessed | 10 | Recreation | 1930 |
| Mountain Lake Dam | Low | Not assessed | 10 | Recreation | 1928 |
| Blind Pond Dam | Low | Not assessed | 10 | Recreation | 1960 |
| Wells Pond Dam | Low | Not assessed | 10 | Recreation | 1929 |
| Wolf Reservoir Dam | Low | Not assessed | 10 | Recreation | 1890 |
| Gillman Pond Dam | Low | Not assessed | 9 | Recreation | 1914 |
| Joseph Lynch Pond Dam | Low | Not assessed | 9 | Recreation | 1962 |
| Fox Lake Dam | Low | Not assessed | 9 | Recreation | 1900 |
| Hunter Lake Dam | Low | Not assessed | 8 | Recreation | 1980 |
| Kiamesha Lake Dam | Low | Not assessed | 8 | Recreation | 1914 |
| Sherwood Allen Pond Dam | Low | Not assessed | 8 | Recreation | 1963 |
| Hartwood Club Dam | Low | Not assessed | 8 | Recreation | 1870 |
| Twin Ponds Dam Upper | Low | Not assessed | 8 | Recreation | |
| Crystal Lake Dam | Low | Not assessed | 8 | Recreation | 1920 |
| Lilly Pond Dam | Low | Not assessed | 8 | Water Supply | 1922 |
| Ruddick Pond Dam | Low | Not assessed | 8 | Recreation | 1910 |
| South Wind Lake Dam | Low | Not assessed | 8 | Recreation | 1960 |
| Jacob Miller Pond Dam | Low | Not assessed | 8 | Recreation | 1988 |
| Roedy Pond Dam | Low | Not assessed | 7 | Recreation | 1946 |
| Mallory Pond Dam | Low | Not assessed | 7 | Recreation | 1950 |
| Lake Superior Dam | Low | Not assessed | 7 | Recreation | 1920 |
| Camp Diana Dalmqua Pond Dam | Low | Not assessed | 7 | Recreation | |
| Lake Florence Dam | Low | Not assessed | 7 | Recreation | 1920 |
| Beaver Lake Dam | Low | Not assessed | 7 | Recreation | 1940 |
| Wolf Lake Inc Dam | Low | Not assessed | 7 | Recreation | 1940 |
| Ten Mile River Boy Scout Camp Dam | Undetermined | Not assessed | 9 | Recreation |