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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.

Clear
Name State County Height (ft) Hazard Condition Year Purpose
Conway Treatment Lagoon Dam New Hampshire Carroll 7 Significant Satisfactory 1985 Other
Mountain Pond South Dam New Hampshire Belknap 7 Low Fair 1913 Water Supply
Pleasant Lake Dam New Hampshire Rockingham 7 Low Satisfactory 1921 Recreation
Contoocook Lake Dam New Hampshire Cheshire 7 Low Not Rated 1885 Recreation
Red Hill Pond Dam New Hampshire Carroll 7 Low Poor 1870 Recreation
Country Pond Dam New Hampshire Rockingham 6 Undetermined Not Rated — Recreation
Walker Pond Dam New Hampshire Merrimack 6 Undetermined Not Rated 1900 Recreation
Stone Pond Overflow Dam New Hampshire Cheshire 6 Low Satisfactory — Recreation
Pratt Pond Spillway Section New Hampshire Hillsborough 6 Low Fair 1935 Recreation
Charlestown Ww Lagoon Dam New Hampshire Sullivan 5 Significant Satisfactory 1995 Other
Mt Carberry Leachate Pond Dam New Hampshire Coos 5 Significant Satisfactory — Other
Unh Water Treament Residual Lagoons New Hampshire Strafford 5 Significant Satisfactory 2017 Other
Dartmouth Skiway Sewage Lagoon Dam New Hampshire Grafton 4 Significant Satisfactory 1967 Other
Rochester Reservoir Dike Spillway New Hampshire Strafford 2 High Satisfactory 1935 Water Supply
Transfer Station Lagoons Dam New Hampshire Merrimack 0 Significant Unsatisfactory — 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.