Dams in Coos County, New Hampshire
60Total Dams
10High Hazard
16Significant
| Dam | Hazard | Condition | Height (ft) | Purpose | Year |
|---|---|---|---|---|---|
| Murphy Dam | High | Not Rated | 106 | Recreation | 1938 |
| Cascade | High | Fair | 57 | Hydroelectric | 1903 |
| First Connecticut Lake Dam | High | Fair | 56 | Hydroelectric | 1930 |
| Dead River Dam 1 | High | Fair | 47 | Flood Risk Reduction | 1970 |
| Abeniki Lake Dam | High | Satisfactory | 40 | Recreation | 1900 |
| Lake Gloriette Dike | High | Poor | 34 | Recreation | 1913 |
| Lake Gloriette Dam | High | Poor | 33 | Recreation | 1913 |
| J. Brodie Smith | High | Satisfactory | 31 | Hydroelectric | 1948 |
| Cross Power | High | Satisfactory | 25 | Hydroelectric | 1903 |
| Stratford Bog Pond Dam | High | Poor | 16 | Recreation | 1934 |
| Balsams Mohawk River Dam | Significant | Not Rated | 55 | Recreation | |
| Whitefield Lagoon Dam | Significant | Satisfactory | 32 | Other | 1984 |
| Balsams Wastewater Lagoons Dam | Significant | Fair | 28 | Other | 1965 |
| Groveton Paper Mill Lagoons Dam | Significant | Fair | 25 | Other | 2010 |
| Groveton Municipal Lagoons Dam | Significant | Satisfactory | 20 | Other | 2012 |
| Faraway Pond Dam | Significant | Satisfactory | 20 | Recreation | 1975 |
| Mwh Sewage Lagoons Dam | Significant | Fair | 19 | Other | 2000 |
| Brooklyn | Significant | Unsatisfactory | 19 | Hydroelectric | 1919 |
| Godfrey Dam | Significant | Satisfactory | 18 | Water Supply | 1920 |
| Icy Gulch Reservoir Dam | Significant | Satisfactory | 18 | Water Supply | 1940 |
| Resort Waste Water Lagoon Dam | Significant | Satisfactory | 15 | Other | 1987 |
| Colebrook Sewage Lagoon Dam | Significant | Satisfactory | 15 | Other | 1975 |
| Cascade Wastewater Lagoon Dam | Significant | Satisfactory | 13 | Other | 1975 |
| Big Brook Bog Dam | Significant | Fair | 11 | Recreation | 1946 |
| Moose Falls Dam | Significant | Poor | 10 | Fish and Wildlife Pond | 1950 |
| Mt Carberry Leachate Pond Dam | Significant | Satisfactory | 5 | Other | |
| Gilman | Low | Satisfactory | 38 | Hydroelectric | 1898 |
| Second Connecticut Lake Dam | Low | Fair | 28 | Hydroelectric | 1849 |
| Shehan Pond Dam | Low | Poor | 25 | Fish and Wildlife Pond | 1960 |
| Errol | Low | Satisfactory | 25 | Hydroelectric | 1887 |
| Lake Twotowns Dam | Low | Satisfactory | 25 | Recreation | 1936 |
| Gorham | Low | Satisfactory | 24 | Hydroelectric | 1904 |
| Israel River Dam | Low | Unsatisfactory | 22 | Flood Risk Reduction | 1981 |
| Riverside | Low | Satisfactory | 21 | Hydroelectric | 1970 |
| Gorham | Low | Satisfactory | 20 | Hydroelectric | 1958 |
| Weston | Low | Satisfactory | 20 | Hydroelectric | 1987 |
| Canaan | Low | Satisfactory | 19 | Hydroelectric | 1927 |
| Little Bog Pond Dam | Low | Not Rated | 18 | Recreation | 1930 |
| Shelburne | Low | Satisfactory | 17 | Hydroelectric | 1906 |
| Phillips Pond Dam | Low | Not Rated | 15 | Recreation | 1926 |
| Sawmill | Low | Satisfactory | 15 | Hydroelectric | 1965 |
| Pontook | Low | Satisfactory | 15 | Hydroelectric | 1909 |
| Dead River Dike | Low | Fair | 14 | Flood Risk Reduction | 1970 |
| Pearley Terrill Dam | Low | Not Rated | 14 | Recreation | 1965 |
| First Conn Lake South Bay Dike | Low | Fair | 14 | Recreation | |
| East Inlet Dam | Low | Satisfactory | 13 | Recreation | 1900 |
| Burns Lake Dam | Low | Fair | 13 | Recreation | 1921 |
| Akers Pond Dam | Low | Satisfactory | 12 | Recreation | 1930 |
| York Pond Dam | Low | Not Rated | 12 | Recreation | 1930 |
| Airport Marsh Dam | Low | Poor | 11 | Recreation | 1956 |
| Lower Trio Pond Dam | Low | Not Rated | 11 | Recreation | 1936 |
| Mud Pond Dam | Low | Fair | 10 | Water Supply | 1920 |
| Coon Brook Bog Dam | Low | Poor | 10 | Recreation | 1947 |
| Lime Pond Dam | Low | Satisfactory | 10 | Recreation | 1934 |
| Boundary Pond Dam | Low | Satisfactory | 10 | Recreation | 1952 |
| Scott Bog Pond Dam | Low | Satisfactory | 9 | Fish and Wildlife Pond | 1942 |
| Back Lake Dam | Low | Poor | 7 | Recreation | 1930 |
| Godbout Pond West Dike | Undetermined | Not Rated | 35 | Recreation | |
| Washburn Mill Dam | Undetermined | Not Rated | 25 | Fish and Wildlife Pond | |
| Perry Pond Dam | Undetermined | Poor | 7 | Fish and Wildlife Pond | 1947 |