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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
Pawtuckaway Lake Dollof Dam New Hampshire Rockingham 28 High Poor 1842 Recreation
Manchester Airport Det Pond Dam New Hampshire Rockingham 27 Low Satisfactory 1992 Flood Risk Reduction
Montcalm Golf Club Dam New Hampshire Grafton 27 Low Fair 1984 Recreation
Locke 1 Dam New Hampshire Grafton 27 Low Poor 1970 Recreation
Macallen Dam New Hampshire Rockingham 27 High Satisfactory 1887 Recreation
Otis Falls New Hampshire Hillsborough 27 Significant Satisfactory 1982 Hydroelectric
High View Wildlife Pond Dam New Hampshire Sullivan 27 Low Poor 1968 Recreation
Hoods Pond Dam New Hampshire Rockingham 27 High Satisfactory 1945 Recreation
Cheshire Mills New Hampshire Cheshire 27 Significant Satisfactory 1886 Hydroelectric
Campus Drive Dam New Hampshire Merrimack 26 Significant Fair 2006 Flood Risk Reduction
Clement Dam New Hampshire Belknap 26 Significant Not Rated 1901 Hydroelectric
Rochester Reservoir Dam New Hampshire Strafford 26 High Satisfactory 1935 Water Supply
Pembroke New Hampshire Merrimack 26 Low Satisfactory 1891 Hydroelectric
Mcindoes New Hampshire Grafton 25 Low Satisfactory 1931 Hydroelectric
Pheasant Ridge Cc Pond Dam New Hampshire Belknap 25 Significant Fair 1976 Recreation
Fenn Dam New Hampshire Grafton 25 Low Unsatisfactory 1984 Recreation
Jaffrey Sewage Lagoon Dam New Hampshire Cheshire 25 Significant Fair 1984 Other
Country Club Pond Dam New Hampshire Rockingham 25 Low Satisfactory 1996 Recreation
Verney Mill Hydro Dam New Hampshire Hillsborough 25 High Not Rated 1916 Hydroelectric
Lake Twotowns Dam New Hampshire Coos 25 Low Satisfactory 1936 Recreation
Meredith Reservoir Dam New Hampshire Belknap 25 Low Satisfactory 1934 Recreation
Deering Reservoir Dam New Hampshire Hillsborough 25 High Satisfactory 1940 Recreation
Groveton Paper Mill Lagoons Dam New Hampshire Coos 25 Significant Fair 2010 Other
Shehan Pond Dam New Hampshire Coos 25 Low Poor 1960 Fish and Wildlife Pond
Washburn Mill Dam New Hampshire Coos 25 Undetermined Not Rated — Fish and Wildlife Pond
Errol New Hampshire Coos 25 Low Satisfactory 1887 Hydroelectric
Boston Lot Lake Dam New Hampshire Grafton 25 Significant Satisfactory 1936 Recreation
Goodrich Falls Dam New Hampshire Carroll 25 Low Not Rated 1935 Hydroelectric
Bowers Dam New Hampshire Hillsborough 25 High Poor 1884 Water Supply
Cross Power New Hampshire Coos 25 High Satisfactory 1903 Hydroelectric
Souhegan Site 8 Dam New Hampshire Hillsborough 25 High Satisfactory 1977 Flood Risk Reduction
Tyler Tree Farm Dam New Hampshire Grafton 25 Significant Fair 1969 Fish and Wildlife Pond
Baker River Site 11 Dam New Hampshire Grafton 24 High Poor 1971 Flood Risk Reduction
Pickering Ponds Dam New Hampshire Strafford 24 Low Not Rated 1980 Other
Bow Lake Dam New Hampshire Strafford 24 High Poor 1832 Recreation
Baker River Site 11a Dam New Hampshire Grafton 24 High Satisfactory 1971 Flood Risk Reduction
New Wilton Reservoir Dam New Hampshire Hillsborough 24 High Poor 1931 Recreation
Apthorp New Hampshire Grafton 24 Significant Satisfactory 1936 Hydroelectric
Gorham New Hampshire Coos 24 Low Satisfactory 1904 Hydroelectric
Sheep Davis Road Dam New Hampshire Merrimack 24 Low Fair 1990 Flood Risk Reduction
Penacook Upper Falls New Hampshire Merrimack 23 Low Satisfactory 1987 Hydroelectric
Eastman Holding Pond Dam New Hampshire Sullivan 23 Low Not Rated — Other
Davison Wildlife Pond Dam New Hampshire Sullivan 23 Low Satisfactory 1968 Fish and Wildlife Pond
Millen Lake Dam New Hampshire Sullivan 23 Significant Satisfactory 1970 Recreation
Harris Brook Reservoir Dam New Hampshire Grafton 22 Significant Poor 1903 Recreation
Webster New Hampshire Merrimack 22 Significant Satisfactory 1917 Hydroelectric
Hillsborough Mill New Hampshire Hillsborough 22 Significant Fair 1925 Hydroelectric
Monadnock New Hampshire Hillsborough 22 Low Satisfactory 1923 Hydroelectric
Woodward Pond Dam New Hampshire Cheshire 22 High Satisfactory 1836 Water Supply
Crystal Lake Dam New Hampshire Grafton 22 Significant Satisfactory 1910 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.