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 |
|---|---|---|---|---|---|---|---|
| Wiswall Dam | New Hampshire | Strafford | 22 | Significant | Fair | 1911 | Recreation |
| Crystal Lake Dam | New Hampshire | Grafton | 22 | Significant | Satisfactory | 1910 | Recreation |
| Harris Brook Reservoir Dam | New Hampshire | Grafton | 22 | Significant | Poor | 1903 | Recreation |
| Woodward Pond Dam | New Hampshire | Cheshire | 22 | High | Satisfactory | 1836 | Water Supply |
| Bow Lake Dam | New Hampshire | Strafford | 22 | High | Poor | 1924 | Recreation |
| Mount Sunapee Sewage Lagoon Dam | New Hampshire | Merrimack | 22 | Significant | Satisfactory | 1973 | Other |
| Grafton Pond Dam | New Hampshire | Grafton | 21 | Low | Fair | 1918 | Recreation |
| Oyster Reservoir Dam | New Hampshire | Strafford | 21 | Significant | Fair | 1934 | Water Supply |
| Souhegan River Site 33 Dam | New Hampshire | Hillsborough | 21 | High | Fair | 1971 | Flood Risk Reduction |
| Derry Waste Lagoon Dam | New Hampshire | Rockingham | 21 | Significant | Satisfactory | 1978 | Other |
| Taylor Reservoir Dam | New Hampshire | Rockingham | 21 | Significant | Poor | 1918 | Recreation |
| Powder Mill | New Hampshire | Hillsborough | 21 | Low | Satisfactory | 1924 | Hydroelectric |
| Ballard Pond Mill Dam | New Hampshire | Rockingham | 21 | Significant | Satisfactory | 1941 | Recreation |
| Flagpole Pond Dam | New Hampshire | Merrimack | 21 | Low | Fair | 1967 | Recreation |
| Riverside | New Hampshire | Coos | 21 | Low | Satisfactory | 1970 | Hydroelectric |
| Baltic Mills Dam | New Hampshire | Grafton | 21 | Low | Not Rated | 1919 | Hydroelectric |
| Lovell Lake Dam | New Hampshire | Carroll | 21 | High | Poor | 1924 | Recreation |
| Lake Gloriette Dike | New Hampshire | Coos | 21 | High | Poor | 1920 | Recreation |
| Franklin Falls Hydro Dam 2 | New Hampshire | Merrimack | 20 | Significant | Not Rated | 1888 | Hydroelectric |
| Paper Mills Holding Pond Dam | New Hampshire | Cheshire | 20 | Significant | Fair | 1974 | Other |
| Weston | New Hampshire | Coos | 20 | Low | Satisfactory | 1987 | Hydroelectric |
| Three Mile Reservoir Dam | New Hampshire | Cheshire | 20 | High | Satisfactory | 1986 | Flood Risk Reduction |
| Mill Pond Dam | New Hampshire | Cheshire | 20 | Low | Poor | 1880 | Recreation |
| Gorham | New Hampshire | Coos | 20 | Low | Satisfactory | 1958 | Hydroelectric |
| Milton Waste Water Lagoons Dam | New Hampshire | Strafford | 20 | Significant | Fair | 1985 | Other |
| Groveton Municipal Lagoons Dam | New Hampshire | Coos | 20 | Significant | Satisfactory | 2012 | Other |
| Spoons Pond Dam | New Hampshire | Cheshire | 20 | Low | Poor | 1966 | Recreation |
| Dickerman Pond Dam | New Hampshire | Belknap | 20 | Significant | Poor | 1930 | Fish and Wildlife Pond |
| Faraway Pond Dam | New Hampshire | Coos | 20 | Significant | Satisfactory | 1975 | Recreation |
| Shannon Lake Dam | New Hampshire | Carroll | 20 | Significant | Fair | 1930 | Recreation |
| Millville Lake Dam | New Hampshire | Rockingham | 20 | High | Poor | 1917 | Recreation |
| Dorr Woolen Sewage Lagoon Dam | New Hampshire | Sullivan | 20 | Significant | Fair | 1982 | Other |
| Hatfields | New Hampshire | Strafford | 20 | Significant | Satisfactory | 1937 | Hydroelectric |
| Cohas Avenue Dam | New Hampshire | Hillsborough | 20 | Low | Satisfactory | 1874 | Water Supply |
| Baker River Site 5 Dike | New Hampshire | Grafton | 20 | Low | Satisfactory | 1969 | Flood Risk Reduction |
| Hermit Lake Dam | New Hampshire | Belknap | 20 | Low | Fair | 1927 | Recreation |
| Ches Cnty Ww Lagoon Dam | New Hampshire | Cheshire | 20 | Significant | Satisfactory | 1971 | Other |
| Fiske Mill Hydro Dam | New Hampshire | Cheshire | 20 | Low | Not Rated | 1922 | Hydroelectric |
| Rollinsford | New Hampshire | Strafford | 20 | Significant | Satisfactory | 1910 | Hydroelectric |
| Exeter Reservoir Dam | New Hampshire | Rockingham | 20 | High | Poor | 1935 | Recreation |
| Brooklyn | New Hampshire | Coos | 19 | Significant | Unsatisfactory | 1919 | Hydroelectric |
| Canaan | New Hampshire | Coos | 19 | Low | Satisfactory | 1927 | Hydroelectric |
| Spaulding Pond Dam | New Hampshire | Strafford | 19 | Low | Satisfactory | 1899 | Hydroelectric |
| Cobble Mountain Dam | New Hampshire | Belknap | 19 | Low | Satisfactory | 1986 | Recreation |
| Newfields Sewage Lagoon Dam | New Hampshire | Rockingham | 19 | Significant | Satisfactory | 1982 | Other |
| Waterville Valley Lagoons Dam | New Hampshire | Grafton | 19 | Significant | Satisfactory | 1972 | Other |
| Lincoln Sewage Lagoon Dam | New Hampshire | Grafton | 19 | Significant | Satisfactory | 1975 | Other |
| Wong Wildlife Pond Dam | New Hampshire | Belknap | 19 | Low | Poor | 1976 | Fish and Wildlife Pond |
| Pine Island Pond Dam | New Hampshire | Hillsborough | 19 | Low | Fair | 1896 | Recreation |
| Larrys Pond Dam | New Hampshire | Cheshire | 19 | Low | Not Rated | 1970 | 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.