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Browse Dams

665 dams in the National Inventory of Dams.

National Inventory of Dams

Browse 665 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
Goose Pond Dam New Hampshire Cheshire 22 High Satisfactory 1868 Recreation
Hillsborough Mill New Hampshire Hillsborough 22 Significant Fair 1925 Hydroelectric
Harris Brook Reservoir Dam New Hampshire Grafton 22 Significant Poor 1903 Recreation
Monadnock New Hampshire Hillsborough 22 Low Satisfactory 1923 Hydroelectric
Mount Sunapee Sewage Lagoon Dam New Hampshire Merrimack 22 Significant Satisfactory 1973 Other
Woodward Pond Dam New Hampshire Cheshire 22 High Satisfactory 1836 Water Supply
Webster New Hampshire Merrimack 22 Significant Satisfactory 1917 Hydroelectric
Derry Waste Lagoon Dam New Hampshire Rockingham 21 Significant Satisfactory 1978 Other
Oyster Reservoir Dam New Hampshire Strafford 21 Significant Fair 1934 Water Supply
Baltic Mills Dam New Hampshire Grafton 21 Low Not Rated 1919 Hydroelectric
Taylor Reservoir Dam New Hampshire Rockingham 21 Significant Poor 1918 Recreation
Souhegan River Site 33 Dam New Hampshire Hillsborough 21 High Fair 1971 Flood Risk Reduction
Jones Dam New Hampshire Strafford 21 High Poor 1924 Recreation
Powder Mill New Hampshire Hillsborough 21 Low Satisfactory 1924 Hydroelectric
Grafton Pond Dam New Hampshire Grafton 21 Low Fair 1918 Recreation
Ballard Pond Mill Dam New Hampshire Rockingham 21 Significant Satisfactory 1941 Recreation
Riverside New Hampshire Coos 21 Low Satisfactory 1970 Hydroelectric
Flagpole Pond Dam New Hampshire Merrimack 21 Low Fair 1967 Recreation
Pittsfield Mill Dam New Hampshire Merrimack 21 High Poor 1920 Recreation
Faraway Pond Dam New Hampshire Coos 20 Significant Satisfactory 1975 Recreation
Baker River Site 5 Dike New Hampshire Grafton 20 Low Satisfactory 1969 Flood Risk Reduction
Rollinsford New Hampshire Strafford 20 Significant Satisfactory 1910 Hydroelectric
Hadley Falls New Hampshire Hillsborough 20 Significant Satisfactory 1922 Hydroelectric
Mill Pond Dam New Hampshire Cheshire 20 Low Poor 1880 Recreation
Spoons Pond Dam New Hampshire Cheshire 20 Low Poor 1966 Recreation
Weston New Hampshire Coos 20 Low Satisfactory 1987 Hydroelectric
Dorr Woolen Sewage Lagoon Dam New Hampshire Sullivan 20 Significant Fair 1982 Other
Hatfields New Hampshire Strafford 20 Significant Satisfactory 1937 Hydroelectric
Three Mile Reservoir Dam New Hampshire Cheshire 20 High Satisfactory 1986 Flood Risk Reduction
Millville Lake Dam New Hampshire Rockingham 20 High Poor 1917 Recreation
Gorham New Hampshire Coos 20 Low Satisfactory 1958 Hydroelectric
Dickerman Pond Dam New Hampshire Belknap 20 Significant Poor 1930 Fish and Wildlife Pond
Groveton Municipal Lagoons Dam New Hampshire Coos 20 Significant Satisfactory 2012 Other
Walpole Reservoir Dam New Hampshire Cheshire 20 High Poor 1901 Water Supply
Milton Waste Water Lagoons Dam New Hampshire Strafford 20 Significant Fair 1985 Other
Cohas Avenue Dam New Hampshire Hillsborough 20 Low Satisfactory 1874 Water Supply
Fiske Mill Hydro Dam New Hampshire Cheshire 20 Low Not Rated 1922 Hydroelectric
Dells Pond Outlet Dam New Hampshire Grafton 20 High Poor 1935 Recreation
Franklin Falls Hydro Dam 2 New Hampshire Merrimack 20 Significant Not Rated 1888 Hydroelectric
Shannon Lake Dam New Hampshire Carroll 20 Significant Fair 1930 Recreation
Ches Cnty Ww Lagoon Dam New Hampshire Cheshire 20 Significant Satisfactory 1971 Other
Hermit Lake Dam New Hampshire Belknap 20 Low Fair 1927 Recreation
Paper Mills Holding Pond Dam New Hampshire Cheshire 20 Significant Fair 1974 Other
Pine Island Pond Dam New Hampshire Hillsborough 19 Low Fair 1896 Recreation
Milton Three Ponds Dam New Hampshire Strafford 19 High Poor 1824 Recreation
Spaulding Pond Dam New Hampshire Strafford 19 Low Satisfactory 1899 Hydroelectric
Cobble Mountain Dam New Hampshire Belknap 19 Low Satisfactory 1986 Recreation
Canaan New Hampshire Coos 19 Low Satisfactory 1927 Hydroelectric
Waterville Valley Lagoons Dam New Hampshire Grafton 19 Significant Satisfactory 1972 Other
Newfields Sewage Lagoon Dam New Hampshire Rockingham 19 Significant Satisfactory 1982 Other

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.