Dams in Sullivan County, New Hampshire
42Total Dams
7High Hazard
19Significant
Dam Safety in Sullivan County, New Hampshire
Sullivan County has 42 dams tracked in the National Inventory of Dams. Of these, 7 are classified as high hazard — meaning failure would probably cause loss of human life. Another 19 carry a significant hazard classification. Currently, 4 dams have a condition assessment of poor or unsatisfactory.
The average dam in Sullivan County is 85 years old. The most common purpose is recreation. The tallest dam is Whitewater Brook Dam at 95 ft.
Explore more: Oldest dams in New Hampshire · Tallest dams · High risk dams · Largest reservoirs
| Dam | Hazard | Condition | Height (ft) | Purpose | Year |
|---|---|---|---|---|---|
| Whitewater Brook Dam | High | Fair | 95 | Water Supply | 1968 |
| Gunnison Lake Site D2 Dam | High | Fair | 62 | Flood Risk Reduction | 1983 |
| Rice Reservoir Dam | High | Satisfactory | 48 | Water Supply | 1935 |
| Dole Reservoir Dam | High | Fair | 43 | Water Supply | 1913 |
| Eastman Lake Dam | High | Satisfactory | 35 | Recreation | 1972 |
| Loon Lake Dam | High | Poor | 15 | Recreation | 1920 |
| Ashuelot Pond Dam | High | Poor | 13 | Recreation | 1872 |
| Sweetwater | Significant | Satisfactory | 33 | Hydroelectric | 1922 |
| Lower Valley | Significant | Satisfactory | 33 | Hydroelectric | 1921 |
| Millen Lake Dam | Significant | Satisfactory | 23 | Recreation | 1970 |
| Dorr Woolen Sewage Lagoon Dam | Significant | Fair | 20 | Other | 1982 |
| Cold Brook Pond Dam | Significant | Satisfactory | 19 | Recreation | 1956 |
| Eastman Treatment Lagoons Dam | Significant | Not Rated | 18 | Flood Risk Reduction | |
| Mcgary Fletcher Rec Pond Dam | Significant | Satisfactory | 18 | Recreation | 1978 |
| Sugar River I | Significant | Satisfactory | 18 | Hydroelectric | 1928 |
| Wendall Marsh Dam | Significant | Fair | 15 | Recreation | |
| Sunapee | Significant | Satisfactory | 15 | Hydroelectric | 1856 |
| Sunapee Lake Dam | Significant | Not Rated | 14 | Recreation | 1872 |
| May Pond Dam | Significant | Fair | 14 | Recreation | 1830 |
| Morgan Pond Dam | Significant | Fair | 12 | Recreation | 1939 |
| Municipal Primary Sewage Lagoon 1 | Significant | Satisfactory | 11 | Other | 1968 |
| Municipal Finishing Sewage Lagoon 2 | Significant | Satisfactory | 11 | Other | 1968 |
| Dole Reservoir Dike | Significant | Fair | 11 | Water Supply | 1913 |
| Sugar River Ii | Significant | Satisfactory | 10 | Hydroelectric | 2009 |
| Meriden Village Sewage Lagoon Dam | Significant | Satisfactory | 9 | Other | 1982 |
| Charlestown Ww Lagoon Dam | Significant | Satisfactory | 5 | Other | 1995 |
| High View Wildlife Pond Dam | Low | Poor | 27 | Recreation | 1968 |
| Eastman Holding Pond Dam | Low | Not Rated | 23 | Other | |
| Davison Wildlife Pond Dam | Low | Satisfactory | 23 | Fish and Wildlife Pond | 1968 |
| Bog Brook Pond Dam | Low | Satisfactory | 18 | Recreation | 1957 |
| Washburn Corners Dam | Low | Satisfactory | 14 | Recreation | 1950 |
| Island Pond Dam | Low | Satisfactory | 13 | Recreation | 1861 |
| Otter Pond Dam | Low | Satisfactory | 12 | Recreation | 1920 |
| Richardson Brook Pond Dam | Low | Poor | 12 | Recreation | 1968 |
| Wildlife Pond Dam | Low | Satisfactory | 12 | Fish and Wildlife Pond | 1972 |
| Long Pond Dam | Low | Fair | 10 | Recreation | 1910 |
| Willow Pond Dam | Low | Satisfactory | 10 | Recreation | 1982 |
| Hall Pond Dam | Low | Satisfactory | 9 | Recreation | 1935 |
| Red Leaf Pond Dam | Low | Not Rated | 8 | Recreation | 1892 |
| Hall Pond Dike | Low | Satisfactory | 7 | Recreation | 1955 |
| Star Lake Dam | Low | Satisfactory | 7 | Hydroelectric | 1920 |
| Wildlife Pond Dam | Undetermined | Not Rated | 16 | Fish and Wildlife Pond | 1955 |