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Browse Dams

1,939 dams in the National Inventory of Dams.

National Inventory of Dams

Browse 1,939 dams from the NID database. Each record includes dam name, location, physical dimensions, hazard potential classification, condition assessment, purpose, owner information, and emergency action plan status. Use the filters below to search by state, hazard level, condition, or keyword.

Name State County Height (ft) Hazard Condition Year Purpose
Little Falls Reservoir Dam New York Herkimer 42 Significant Satisfactory 1901 Water Supply
Honk Falls Dam New York Ulster 42 High Poor 1898 Recreation
Winnisook Lake Dam New York Ulster 42 Low Not Rated — Recreation
Nanticoke Creek Site 9e Dam New York Broome 42 High Not Rated 1967 Flood Risk Reduction
Stillwater Pond Dam New York Putnam 42 Low Not Rated 1939 Water Supply
Hamilton College Reservoir #4 Dam New York Oneida 42 Low Not Rated 1920 Recreation
Black River Pond Dam New York Rensselaer 42 High Fair 1935 Recreation
South Colton New York St. Lawrence 42 High Satisfactory 1954 Hydroelectric
Ischua Creek Watershed Dam #2 New York Cattaraugus 42 High Satisfactory 1961 Flood Risk Reduction
Jerome Park Reservoir Dam New York Bronx 42 High Satisfactory 1906 Water Supply
Conewango Creek Site 16a Dam New York Cattaraugus 42 High Fair 1970 Flood Risk Reduction
Chadwicks Dam New York Oneida 41 Low Not Rated — Other
Trenton - Power Intake New York Oneida 41 Significant Satisfactory 1983 Hydroelectric
Nanticoke Creek Site 8 Dam New York Broome 41 High Satisfactory 1970 Flood Risk Reduction
Port Jervis Reservoir #2 Dam New York Orange 41 High Fair 1880 Water Supply
Waterville Upper Storage Reservoir Dam New York Oneida 41 Significant Not Rated 1953 Water Supply
Pelton Pond Dam New York Putnam 41 Significant Poor 1939 Other
Conewango Creek Site 6 Dam New York Chautauqua 41 Significant Not Rated 1971 Flood Risk Reduction
Mulford Dam New York Madison 40 Low Not Rated — Recreation
Upper Warwick Dam New York Orange 40 Low Fair 1912 Water Supply
Lock 32 Dam Erie Canal New York Monroe 40 High Poor 1908 Navigation
Long Pond Dam New York Westchester 40 Significant Poor 1936 Recreation
Theresa New York Jefferson 40 Low Satisfactory 1929 Hydroelectric
Robert Alcorn Dam New York Cayuga 40 Low Not Rated 1998 Recreation
Kingston Reservoir #2 Dam New York Ulster 40 Significant Poor 1910 Recreation
Grassy Sprain Reservoir Dam New York Westchester 40 High Satisfactory 1876 Recreation
Vly Creek Reservoir Dike New York Albany 40 High Satisfactory 1957 Water Supply
Cooper Lake Dam and West Dike New York Ulster 40 High Satisfactory 1800 Water Supply
Springville Dam New York Erie 40 High Fair 1922 Recreation
Canajoharie Reservoir Dam New York Fulton 40 Significant Poor 1948 Water Supply
Northville Reservoir Dam New York Fulton 40 Low Not Rated 1929 Recreation
Stewarts Landing Dam New York Fulton 40 Significant Not Rated 1923 Recreation
Lake Deforest Dam New York Rockland 40 High Satisfactory 1956 Water Supply
Ilion Reservoir #1 Dam New York Herkimer 40 High Poor 1895 Water Supply
Green Haven Correctional Facility Dam New York Dutchess 40 High Poor 1939 Fire Protection, Stock, Or ...
Lock 33 Dam Erie Canal New York Monroe 40 High Poor 1908 Hydroelectric
Conewango Creek Site 13 Dam New York Cattaraugus 39 Significant Not Rated 1982 Flood Risk Reduction
Tillson Lake Dam New York Ulster 39 High Poor 1930 Recreation
Punch Bowl Dam New York Schuyler 39 High Fair 1936 Recreation
Johnsonville New York Rensselaer 39 High Satisfactory 1909 Hydroelectric
Turkey Hill Dam New York Orange 39 Low Not Rated 1933 Recreation
Pelto Dam New York Tioga 39 High Poor 1955 Flood Risk Reduction
Norwich Ymca Recreation Pond Dam New York Chenango 39 Significant Poor 1970 Recreation
Peck Lake Dam New York Fulton 39 High Poor 1910 Hydroelectric
Normanskill New York Albany 39 High Fair 1916 Hydroelectric
Benson Mines Plant Dam New York St. Lawrence 38 Low Not Rated — Irrigation
Village of Cobleskill Holding Pond Dam New York Schoharie 38 High Satisfactory 1986 Water Supply
Attica Reservoir Dam (Middle) New York Wyoming 38 Significant Not Rated 1925 Water Supply
Lake Macgregor Dam New York Putnam 38 Significant Satisfactory 1955 Recreation
Meizinger Pond Dam New York Columbia 38 Low Not Rated — Recreation

Frequently Asked Questions

Hazard potential is based on the consequences of dam failure, not the condition of the dam. High hazard means loss of human life is probable. Significant means economic and environmental losses are expected but no probable loss of life. Low means minimal losses are expected. The classification considers downstream population, infrastructure, and environmental resources.

Condition ratings reflect the physical state of the dam based on periodic inspections. Satisfactory means no deficiencies found. Fair means minor issues exist but no immediate action needed. Poor means safety deficiencies require remedial action. Unsatisfactory means the dam is unsafe and immediate corrective action is required.

Yes. Use the search field above to find dams by name. You can also combine the search with state, hazard, and condition filters to narrow your results. Each dam record links to a detail page with complete information.