Dams in Hillsborough, New Hampshire
105Total Dams
37High Hazard
18Significant
Dam Safety in Hillsborough, New Hampshire
Hillsborough has 105 dams tracked in the National Inventory of Dams. Of these, 37 are classified as high hazard — meaning failure would probably cause loss of human life. Another 18 carry a significant hazard classification. Currently, 16 dams have a condition assessment of poor or unsatisfactory.
The average dam in Hillsborough is 96 years old. The most common purpose is recreation. The tallest dam is Everett Dam at 115 ft.
Explore more: Oldest dams in New Hampshire · Tallest dams · High risk dams · Largest reservoirs
| Dam | Hazard | Condition | Height (ft) | Purpose | Year |
|---|---|---|---|---|---|
| Everett Dam | High | Not Available | 115 | Flood Risk Reduction | 1961 |
| Souhegan River Site 26 Dam | High | Fair | 79 | Flood Risk Reduction | 1965 |
| Souhegan River Site 25b Dam | High | Fair | 74 | Flood Risk Reduction | 1967 |
| Gregg Falls | High | Satisfactory | 66 | Hydroelectric | 1917 |
| Edward Macdowell Dam | High | Not Available | 63 | Flood Risk Reduction | 1950 |
| Souhegan River Site 10a Dam | High | Satisfactory | 59 | Flood Risk Reduction | 1966 |
| Everett Dam - Dike P-1 | High | Not Available | 50 | Flood Risk Reduction | 1961 |
| Jackman Reservoir Dam | High | Poor | 43 | Hydroelectric | 1926 |
| Souhegan River Site 12a North Dike | High | Fair | 39 | Flood Risk Reduction | 1965 |
| Souhegan River Site 12a South Dam | High | Fair | 38 | Flood Risk Reduction | 1965 |
| Souhegan River Site 19 Dam | High | Fair | 36 | Flood Risk Reduction | 1962 |
| Harris Pond Dam | High | Satisfactory | 35 | Water Supply | 1861 |
| Weare Reservoir Dam | High | Poor | 34 | Recreation | 1913 |
| Goffstown Upper Reservoir Dam | High | Poor | 31 | Water Supply | 1934 |
| Kelley's Falls Dam | High | Poor | 31 | Hydroelectric | 1916 |
| Goffstown Lower Reservoir Dam | High | Fair | 30 | Water Supply | 1906 |
| Massabesic Lake Dam | High | Satisfactory | 30 | Water Supply | 1873 |
| Souhegan River Site 35 Dam | High | Fair | 30 | Flood Risk Reduction | 1965 |
| Everett Dam - Dike P-2 | High | Not Available | 30 | Flood Risk Reduction | 1961 |
| Amoskeag | High | Fair | 29 | Hydroelectric | 1921 |
| Souhegan River Site 28 Dam | High | Satisfactory | 29 | Flood Risk Reduction | 1964 |
| Supply Pond Dam | High | Fair | 28 | Water Supply | 1854 |
| Souhegan Site 14 Dam | High | Fair | 28 | Flood Risk Reduction | 1836 |
| Deering Reservoir Dam | High | Satisfactory | 25 | Recreation | 1940 |
| Bowers Dam | High | Poor | 25 | Water Supply | 1884 |
| Verney Mill Hydro Dam | High | Not Rated | 25 | Hydroelectric | 1916 |
| Souhegan Site 8 Dam | High | Satisfactory | 25 | Flood Risk Reduction | 1977 |
| New Wilton Reservoir Dam | High | Poor | 24 | Recreation | 1931 |
| Souhegan River Site 33 Dam | High | Fair | 21 | Flood Risk Reduction | 1971 |
| Uncanoonuc Lake Dike | High | Fair | 15 | Recreation | 1954 |
| Merrimack River Right Bank Fdr | High | Fair | 15 | Flood Risk Reduction | 1949 |
| Ws Packaging Canal Dam | High | Satisfactory | 15 | Recreation | 1876 |
| Gregg Lake Dam | High | Poor | 12 | Recreation | 1908 |
| Uncanoonuc Lake Dam | High | Satisfactory | 10 | Recreation | 1936 |
| Gumpas Pond Dam | High | Poor | 10 | Recreation | 1900 |
| Dorrs Pond Dam | High | Poor | 9 | Recreation | 1934 |
| Pierce Pond Dam | High | Poor | 8 | Recreation | 1700 |
| Jackson Mills | Significant | Satisfactory | 33 | Hydroelectric | 1920 |
| Otis Falls | Significant | Satisfactory | 27 | Hydroelectric | 1982 |
| Hillsborough Mill | Significant | Fair | 22 | Hydroelectric | 1925 |
| Hadley Falls | Significant | Satisfactory | 20 | Hydroelectric | 1922 |
| Woodbury Estate Pond Dam | Significant | Satisfactory | 16 | Recreation | 1935 |
| Crotched Mtn Storage Lagoon Dam | Significant | Satisfactory | 15 | Other | 1989 |
| Frog Pond Dam | Significant | Not Rated | 15 | Recreation | 1916 |
| Union Street | Significant | Satisfactory | 15 | Hydroelectric | 1916 |
| Monadnock Paper Indust Lag Dam | Significant | Satisfactory | 14 | Other | 1973 |
| Noone Mills | Significant | Satisfactory | 14 | Hydroelectric | 1938 |
| Steels Pond | Significant | Satisfactory | 14 | Hydroelectric | 1909 |
| Antrim Sewage Lagoons Dam | Significant | Satisfactory | 13 | Other | 1978 |
| Souhegan River Site 15 Dam | Significant | Fair | 13 | Flood Risk Reduction | 1963 |
| Hillsborough Sewage Lagoon Dam | Significant | Fair | 12 | Other | 1984 |
| Sargent Center Infiltration Lagoon | Significant | Not Rated | 11 | Other | |
| Farrar Marsh Dam | Significant | Fair | 11 | Recreation | 1978 |
| Peterborough Treatment Lagoon Dam | Significant | Fair | 9 | Other | 1972 |
| Peters Farm Pond Dam | Significant | Unsatisfactory | 9 | Fish and Wildlife Pond | 1856 |
| Compressor Pond Dam | Low | Fair | 28 | Recreation | 1900 |
| Salmon Brook Dam | Low | Not Rated | 28 | Recreation | 1963 |
| Monadnock | Low | Satisfactory | 22 | Hydroelectric | 1923 |
| Powder Mill | Low | Satisfactory | 21 | Hydroelectric | 1924 |
| Cohas Avenue Dam | Low | Satisfactory | 20 | Water Supply | 1874 |
| Pine Island Pond Dam | Low | Fair | 19 | Recreation | 1896 |
| Waterloom Falls | Low | Satisfactory | 18 | Hydroelectric | 1980 |
| Salmon Brook I Dam | Low | Not Rated | 17 | Recreation | 1887 |
| Stump Pond Dam | Low | Fair | 16 | Recreation | 1938 |
| Ayers Pond Dam | Low | Fair | 16 | Recreation | 1865 |
| Souhegan Site 8 Cemetery Dike | Low | Satisfactory | 16 | Flood Risk Reduction | 1977 |
| Mine Falls | Low | Satisfactory | 16 | Hydroelectric | 1889 |
| Perkins Pond Marsh Dam | Low | Satisfactory | 15 | Recreation | 1924 |
| Burton Pond Dam | Low | Fair | 14 | Recreation | 1837 |
| Souhegan River Site 13 Dam | Low | Satisfactory | 14 | Flood Risk Reduction | 1964 |
| Dudley Pond Dam | Low | Poor | 13 | Recreation | |
| Mountain Pond Dam | Low | Fair | 13 | Fish and Wildlife Pond | 1930 |
| Holt Pond Dam | Low | Satisfactory | 13 | Water Supply | 1890 |
| Taylor Pond Dam | Low | Fair | 12 | Recreation | 1965 |
| Daniels Lake Dam | Low | Poor | 12 | Recreation | 1961 |
| North Village Dam | Low | Fair | 12 | Recreation | 1836 |
| Black Fox Pond Dam | Low | Satisfactory | 12 | Recreation | 1975 |
| Drew Lake South Weir | Low | Not Rated | 12 | Flood Risk Reduction | |
| Goldman Dam | Low | Not Rated | 12 | Recreation | 1930 |
| Freestyle Farm Pond Dam | Low | Satisfactory | 12 | Recreation | 1962 |
| Beaver Brook Assoc Wldlife Pond Dam | Low | Fair | 12 | Fish and Wildlife Pond | 1968 |
| Pierce | Low | Satisfactory | 12 | Hydroelectric | 1921 |
| Whittemore Lake Dam | Low | Poor | 11 | Recreation | 1886 |
| Nashua Canal Dam And Dike | Low | Satisfactory | 11 | Recreation | 1886 |
| Riverdale Dam | Low | Not Rated | 10 | Flood Risk Reduction | |
| Otter Brook Dam | Low | Fair | 10 | Recreation | 1928 |
| Black Pond Dam | Low | Fair | 10 | Recreation | 1926 |
| Commerce Park Wildlife Pond Dam | Low | Not Rated | 10 | Fish and Wildlife Pond | 1972 |
| Dunklee Pond Dam | Low | Fair | 9 | Recreation | 1986 |
| Osgood Pond Dam | Low | Fair | 9 | Recreation | 1861 |
| Middle Hancock Llc Dam | Low | Fair | 9 | Fish and Wildlife Pond | 1976 |
| Pratt Pond Dam | Low | Fair | 9 | Recreation | 1935 |
| Evas Marsh Dam | Low | Poor | 9 | Recreation | 1962 |
| Pratt Pond Dike | Low | Fair | 9 | Recreation | |
| Moose Brook Dam | Low | Fair | 9 | Recreation | 1977 |
| Souhegan Site 8 South Dike | Low | Satisfactory | 9 | Flood Risk Reduction | 1977 |
| Paper Mill | Low | Satisfactory | 9 | Hydroelectric | 1922 |
| Hunts Pond Dam | Low | Fair | 8 | Recreation | 1908 |
| Willard Pond Dam | Low | Fair | 8 | Recreation | 1937 |
| Cranberry Meadow Pond Dam | Low | Fair | 8 | Recreation | 1937 |
| Silver Lake Dam | Low | Satisfactory | 8 | Recreation | 1930 |
| Pratt Pond Dam | Low | Poor | 7 | Recreation | 1890 |
| Pratt Pond Spillway Section | Low | Fair | 6 | Recreation | 1935 |
| Wildlife Pond Dam | Undetermined | Not Rated | 10 | Fish and Wildlife Pond | |
| Dream Lake Dam | Undetermined | Not Rated | 9 | Recreation | 1966 |