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Browse Dams

830 dams in the National Inventory of Dams.

National Inventory of Dams

Browse 830 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
Merrill Creek Main Dam New Jersey Warren 280 High Satisfactory 1988 Other
Round Valley South Dam New Jersey Hunterdon 178 High Poor 1961 Water Supply
Monksville Dam New Jersey Passaic 150 High Satisfactory 1986 Water Supply
Round Valley North Dam New Jersey Hunterdon 135 High Poor 1961 Water Supply
Boonton Dam New Jersey Morris 120 High Satisfactory 1905 Water Supply
Raymond Dam New Jersey Passaic 103 High Satisfactory 1928 Water Supply
Charlotteburg Dam New Jersey Morris 102 High Satisfactory 1961 Water Supply
Spruce Run Reservoir Dam New Jersey Hunterdon 93 High Poor 1964 Water Supply
Clyde Potts Reservoir Dam New Jersey Morris 80 High Fair 1932 Water Supply
Round Valley Dike New Jersey Hunterdon 80 High Poor 1961 Water Supply
Great Notch Reservoir Dam New Jersey Passaic 74 High Satisfactory 1898 Water Supply
Canistear Reservoir #1 Dam New Jersey Sussex 70 High Fair 1896 Water Supply
Yards Creek Upper - Main Dam New Jersey Warren 70 High Satisfactory 1965 Hydroelectric
Round Valley P&F Dike New Jersey Hunterdon 68 Low — — Water Supply
Green Swamp #2 Dam New Jersey Passaic 65 High Satisfactory 1925 Water Supply
Green Swamp #4 Dam New Jersey Passaic 65 High Satisfactory 1925 Water Supply
Glendola Reservoir Dam New Jersey Monmouth 65 High Satisfactory 1961 Water Supply
Midvale Dam New Jersey Passaic 61 High Satisfactory 1928 Water Supply
Oak Ridge Reservoir Dam New Jersey Passaic 60 High Poor 1892 Water Supply
Canoe Brook Reservoir #3 Dam New Jersey Essex 57 High Satisfactory 1956 Water Supply
Clinton Reservoir Dam New Jersey Passaic 56 High Fair 1894 Water Supply
Yards Creek Lower - Main Dam New Jersey Warren 55 High Satisfactory 1965 Hydroelectric
Cedar Grove West Res Dam New Jersey Essex 55 High Fair 1903 Water Supply
Point View Dam New Jersey Passaic 55 High Satisfactory 1964 Recreation
Furnace Brook W.S. #2 Dam New Jersey Warren 55 High Satisfactory 1971 Flood Risk Reduction
Manasquan Reservoir Dam New Jersey Monmouth 53 High Satisfactory 1990 Water Supply
Yards Creek Upper - West Dike New Jersey Warren 52 High Satisfactory 1965 Hydroelectric
Trenton Reservoir Dam New Jersey Mercer 52 High Fair 1899 Water Supply
Cedar Grove South Res Dam New Jersey Essex 51 High Satisfactory 1903 Water Supply
Cedar Grove North Res Dam New Jersey Passaic 51 High Fair 1903 Water Supply
Swimming River Reservoir Dam New Jersey Monmouth 45 High Satisfactory 1901 Water Supply
Ravine Lake Dam New Jersey Somerset 45 High Satisfactory 1899 Recreation
Canistear Reservoir #2 Dam New Jersey Sussex 44 High Fair 1896 Water Supply
Lake Solitude Dam New Jersey Hunterdon 42 High Satisfactory — Recreation
Pines Lake Dam New Jersey Passaic 42 High Satisfactory 1927 Recreation
Wolf Den Dam New Jersey Passaic 42 High Satisfactory 1927 Recreation
Canoe Brook Reservoir #3 Dike New Jersey Essex 40 High Satisfactory 1956 Water Supply
Highland Lake Dam New Jersey Passaic 40 High Satisfactory 1947 Recreation
New Jersey No Name # 32 Dam New Jersey Hunterdon 40 Significant Satisfactory — Recreation
Merrill Creek Res. Se Dike New Jersey Warren 39 High Satisfactory — Other
West Branch Reservoir Dam New Jersey Somerset 39 High Poor 1930 Recreation
Split Rock Pond Dam New Jersey Morris 39 High Satisfactory 1948 Water Supply
Assunpink #18 Dam New Jersey Monmouth 38 High Poor — Flood Risk Reduction
Hackettstown Res. Dam New Jersey Morris 38 High Poor — Water Supply
Warren Mill Dam New Jersey Hunterdon 38 High Poor 1916 Water Supply
Woodcliff Lake Dam New Jersey Bergen 38 High Satisfactory 1906 Water Supply
Mt. Kemble Lake Dam New Jersey Morris 36 Significant Satisfactory 1928 Recreation
Assunpink #19 Dam New Jersey Monmouth 36 Significant Fair — Recreation
Hunterdon Learning Center Dam New Jersey Hunterdon 35 Low — 1971 Recreation
Union Lake Dam New Jersey Cumberland 35 High Poor 1869 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.