Dams in Merrimack, New Hampshire

89
Total Dams
18
High Hazard
20
Significant
107.6 yrs
Avg Age
Hazard Name Height
Dam Name Hazard Height Built Type State
Webster Lake Dam Merrimack High Hazard 14 ft 1873 Concrete New Hampshire
Hopkinton Dam Merrimack High Hazard 71 ft 1962 Rockfill New Hampshire
Pleasant Lake Dam Merrimack High Hazard 13 ft 1850 Earth New Hampshire
Hopkinton Dam - Dike H-2 Merrimack High Hazard 77 ft 1962 Earth New Hampshire
Sanborn Sawmill Dam Merrimack High Hazard 13 ft 1830 Earth New Hampshire
Penacook Lake Dam Merrimack High Hazard 9 ft 1873 Earth New Hampshire
Blackwater Dam - Little Hill Dike Merrimack High Hazard 38 ft 1941 Gravity New Hampshire
Blackwater Dam - Dodge Estate Dike Merrimack High Hazard 18 ft 1941 Gravity New Hampshire
Franklin Falls Dam Merrimack High Hazard 116 ft 1943 Rockfill New Hampshire
Turkey Pond Dam Merrimack High Hazard 15 ft 1958 Concrete New Hampshire
Hopkinton Dam - Dike H-3 Merrimack High Hazard 66 ft 1962 Earth New Hampshire
Northwood Lake Dam Merrimack High Hazard 13 ft 1926 Concrete New Hampshire
Pittsfield Mill Dam Merrimack High Hazard 21 ft 1920 Concrete New Hampshire
Blackwater Dam Merrimack High Hazard 75 ft 1941 Gravity New Hampshire
China Mill Dam Merrimack High Hazard 29 ft 1860 Concrete New Hampshire
Berry Pond Dam Merrimack High Hazard 18 ft 1884 Earth New Hampshire
Whites Pond Dam and Dike Merrimack High Hazard 15 ft 1890 Stone New Hampshire
Sanborn Pond Grist Mill Dam Merrimack High Hazard 16 ft 1830 Earth New Hampshire
Franklin Falls Hydro Dam 2 Merrimack Significant Hazard 20 ft 1888 Concrete New Hampshire
Dube Pond Dam Merrimack Significant Hazard 8 ft 1966 Concrete New Hampshire
Webster Merrimack Significant Hazard 22 ft 1917 Concrete New Hampshire
Eastman Falls Merrimack Significant Hazard 43 ft 1937 Concrete New Hampshire
Pittsfield Sewage Lagoon Dam Merrimack Significant Hazard 18 ft 1979 Earth New Hampshire
Runaway Pond East Dam Merrimack Significant Hazard 15 ft 1814 Earth New Hampshire
Highland Lake Dam Merrimack Significant Hazard 10 ft 1935 Earth New Hampshire
Stevens Mill Merrimack Significant Hazard 22 ft 1930 Concrete New Hampshire
Bradley Lake Dam Merrimack Significant Hazard 19 ft 1952 Earth New Hampshire
Lyford Pond Dam Merrimack Significant Hazard 15 ft 1840 Earth New Hampshire
Hoague - Sprague Merrimack Significant Hazard 14 ft 1906 Timber Crib New Hampshire
Transfer Station Lagoons Dam Merrimack Significant Hazard — — — New Hampshire
Hopkinton Sewage Lagoon Dam Merrimack Significant Hazard 18 ft 1983 Earth New Hampshire
Chadwick Meadows Wildlife Ref Dam Merrimack Significant Hazard 47 ft 1970 Earth New Hampshire
Bog Pond Dam Merrimack Significant Hazard 17 ft 1870 Concrete New Hampshire
Campus Drive Dam Merrimack Significant Hazard 26 ft 2006 Earth New Hampshire
Todd Lake Dam Merrimack Significant Hazard 17 ft 1858 Concrete New Hampshire
Chase Pond Dam Merrimack Significant Hazard 17 ft 1915 Earth New Hampshire
Mount Sunapee Sewage Lagoon Dam Merrimack Significant Hazard 22 ft 1973 Earth New Hampshire
Webster Valve CO Dam Merrimack Significant Hazard 15 ft 1901 Concrete New Hampshire
Giles Pond Merrimack Low Hazard 18 ft 1904 Masonry New Hampshire
Penacook Upper Falls Merrimack Low Hazard 23 ft 1987 Concrete New Hampshire
Allied Leather Auxiliary Merrimack Low Hazard 15 ft 1982 Concrete New Hampshire
Goldfish Pond Dam Merrimack Low Hazard 16 ft 1974 Earth New Hampshire
Goose Pond Dam Merrimack Low Hazard 12 ft 1920 Concrete New Hampshire
Knowles Pond Dam Merrimack Low Hazard 11 ft 1935 Earth New Hampshire
Cascade Brook Dam Merrimack Low Hazard 11 ft 1955 Concrete New Hampshire
Emery Road Dam Merrimack Low Hazard 10 ft 1910 Earth New Hampshire
Penacook Lower Falls Diversion Merrimack Low Hazard 15 ft 1982 Concrete New Hampshire
Morey Pond Dam Merrimack Low Hazard 12 ft — Concrete New Hampshire
Flagpole Pond Dike Merrimack Low Hazard 15 ft 1967 Earth New Hampshire
Stark Pond Dam Merrimack Low Hazard 12 ft 1760 Concrete New Hampshire