Dams in Merrimack County, New Hampshire
89Total Dams
18High Hazard
20Significant
| Dam | Hazard | Condition | Height (ft) | Purpose | Year |
|---|---|---|---|---|---|
| Franklin Falls Dam | High | Not Available | 116 | Flood Risk Reduction | 1943 |
| Hopkinton Dam - Dike H-2 | High | Not Available | 77 | Flood Risk Reduction | 1962 |
| Blackwater Dam | High | Not Available | 75 | Flood Risk Reduction | 1941 |
| Hopkinton Dam | High | Not Available | 71 | Flood Risk Reduction | 1962 |
| Hopkinton Dam - Dike H-3 | High | Not Available | 66 | Flood Risk Reduction | 1962 |
| Blackwater Dam - Little Hill Dike | High | Not Available | 38 | Flood Risk Reduction | 1941 |
| China Mill Dam | High | Fair | 29 | Hydroelectric | 1860 |
| Pittsfield Mill Dam | High | Poor | 21 | Recreation | 1920 |
| Berry Pond Dam | High | Satisfactory | 18 | Water Supply | 1884 |
| Blackwater Dam - Dodge Estate Dike | High | Not Available | 18 | Flood Risk Reduction | 1941 |
| Sanborn Pond Grist Mill Dam | High | Fair | 16 | Other | 1830 |
| Turkey Pond Dam | High | Satisfactory | 15 | Recreation | 1958 |
| Whites Pond Dam And Dike | High | Satisfactory | 15 | Recreation | 1890 |
| Webster Lake Dam | High | Satisfactory | 14 | Recreation | 1873 |
| Sanborn Sawmill Dam | High | Satisfactory | 13 | Other | 1830 |
| Northwood Lake Dam | High | Poor | 13 | Recreation | 1926 |
| Pleasant Lake Dam | High | Satisfactory | 13 | Recreation | 1850 |
| Penacook Lake Dam | High | Poor | 9 | Water Supply | 1873 |
| Chadwick Meadows Wildlife Ref Dam | Significant | Fair | 47 | Recreation | 1970 |
| Eastman Falls | Significant | Satisfactory | 43 | Hydroelectric | 1937 |
| Campus Drive Dam | Significant | Fair | 26 | Flood Risk Reduction | 2006 |
| Mount Sunapee Sewage Lagoon Dam | Significant | Satisfactory | 22 | Other | 1973 |
| Webster | Significant | Satisfactory | 22 | Hydroelectric | 1917 |
| Stevens Mill | Significant | Satisfactory | 22 | Hydroelectric | 1930 |
| Franklin Falls Hydro Dam 2 | Significant | Not Rated | 20 | Hydroelectric | 1888 |
| Bradley Lake Dam | Significant | Satisfactory | 19 | Recreation | 1952 |
| Pittsfield Sewage Lagoon Dam | Significant | Satisfactory | 18 | Other | 1979 |
| Hopkinton Sewage Lagoon Dam | Significant | Satisfactory | 18 | Other | 1983 |
| Chase Pond Dam | Significant | Satisfactory | 17 | Recreation | 1915 |
| Todd Lake Dam | Significant | Poor | 17 | Recreation | 1858 |
| Bog Pond Dam | Significant | Satisfactory | 17 | Recreation | 1870 |
| Lyford Pond Dam | Significant | Poor | 15 | Recreation | 1840 |
| Runaway Pond East Dam | Significant | Poor | 15 | Recreation | 1814 |
| Webster Valve Co Dam | Significant | Poor | 15 | Other | 1901 |
| Hoague - Sprague | Significant | Satisfactory | 14 | Hydroelectric | 1906 |
| Highland Lake Dam | Significant | Fair | 10 | Recreation | 1935 |
| Dube Pond Dam | Significant | Poor | 8 | Recreation | 1966 |
| Transfer Station Lagoons Dam | Significant | Unsatisfactory | 0 | Other | |
| Ragged Mountain Snow Pond Dam | Low | Fair | 49 | Fish and Wildlife Pond | 1988 |
| Pembroke | Low | Satisfactory | 26 | Hydroelectric | 1891 |
| Sheep Davis Road Dam | Low | Fair | 24 | Flood Risk Reduction | 1990 |
| Penacook Upper Falls | Low | Satisfactory | 23 | Hydroelectric | 1987 |
| Flagpole Pond Dam | Low | Fair | 21 | Recreation | 1967 |
| Garvins Falls | Low | Satisfactory | 18 | Hydroelectric | 1901 |
| Giles Pond | Low | Satisfactory | 18 | Hydroelectric | 1904 |
| Briar Pipe | Low | Satisfactory | 17 | Hydroelectric | 1936 |
| Goldfish Pond Dam | Low | Fair | 16 | Recreation | 1974 |
| Flagpole Pond Dike | Low | Fair | 15 | Recreation | 1967 |
| Deer Meadow Pond Dam | Low | Fair | 15 | Recreation | 1938 |
| Penacook Lower Falls Diversion | Low | Satisfactory | 15 | Hydroelectric | 1982 |
| Allied Leather Auxiliary | Low | Satisfactory | 15 | Hydroelectric | 1982 |
| Fountain Pond Center Dam | Low | Not Rated | 14 | Recreation | 1800 |
| Catamount Pond Dam | Low | Fair | 14 | Recreation | 1938 |
| Hargate Dam | Low | Satisfactory | 14 | Recreation | 1835 |
| Pillsbury Lake Dam | Low | Satisfactory | 13 | Recreation | 1964 |
| Fifield Farm Pond Dam | Low | Fair | 13 | Fish and Wildlife Pond | 1966 |
| Hall Mountain Marsh Dam | Low | Fair | 13 | Recreation | 1945 |
| New Pond Dam | Low | Not Rated | 13 | Recreation | 1885 |
| Tannery Pond Dam | Low | Satisfactory | 12 | Recreation | 1850 |
| Morey Pond Dam | Low | Fair | 12 | Recreation | |
| Stark Pond Dam | Low | Satisfactory | 12 | Fish and Wildlife Pond | 1760 |
| Loch Lyndon Reservoir Dam | Low | Not Rated | 12 | Recreation | 1901 |
| Goose Pond Dam | Low | Not Rated | 12 | Recreation | 1920 |
| Cascade Brook Dam | Low | Fair | 11 | Recreation | 1955 |
| Knowles Pond Dam | Low | Satisfactory | 11 | Recreation | 1935 |
| Hooksett | Low | Satisfactory | 11 | Hydroelectric | 1927 |
| Morrill Mill Pond Dam | Low | Poor | 11 | Fish and Wildlife Pond | 1800 |
| Emery Road Dam | Low | Fair | 10 | Fish and Wildlife Pond | 1910 |
| Hayes Marsh Dam | Low | Fair | 10 | Recreation | 1951 |
| Cole Pond Dam | Low | Satisfactory | 10 | Recreation | 1973 |
| York | Low | Satisfactory | 10 | Hydroelectric | 1967 |
| Hopkinton | Low | Satisfactory | 10 | Hydroelectric | 1890 |
| Cass Pond Dam | Low | Poor | 10 | Recreation | |
| Blaisdell Lake Dam | Low | Poor | 9 | Recreation | 1916 |
| Knight Meadow Pond Dam | Low | Fair | 9 | Recreation | 1966 |
| Grassy Pond Dam | Low | Fair | 9 | Recreation | 1836 |
| Hoit Road Marsh Dam | Low | Poor | 9 | Recreation | 1968 |
| Kimball Pond Dam | Low | Satisfactory | 8 | Recreation | 1850 |
| Bear Pond Dam | Low | Satisfactory | 8 | Water Supply | 1932 |
| Belanger Recreation Pond Dam | Low | Satisfactory | 8 | Recreation | 1992 |
| Recreation Pond Dam | Low | Fair | 8 | Recreation | 1950 |
| Flintlock Estates Fire Pond Dam | Low | Fair | 8 | Fire Protection, Stock, Or Small Fish Pond | 1987 |
| Putney Meadow Pond Dam | Low | Poor | 8 | Recreation | 1800 |
| Turtle Pond Dam | Low | Poor | 8 | Recreation | 1932 |
| Winnipocket Lake Dam | Low | Poor | 7 | Recreation | 1944 |
| Bear Hill Pond Dam | Low | Fair | 7 | Recreation | 1885 |
| Kimball Lake Dam | Low | Poor | 7 | Recreation | 1930 |
| Huckins Mill Dam | Undetermined | Not Rated | 13 | Recreation | 1830 |
| Walker Pond Dam | Undetermined | Not Rated | 6 | Recreation | 1900 |