Dams in Strafford County, New Hampshire
51Total Dams
13High Hazard
19Significant
Dam Safety in Strafford County, New Hampshire
Strafford County has 51 dams tracked in the National Inventory of Dams. Of these, 13 are classified as high hazard — meaning failure would probably cause loss of human life. Another 19 carry a significant hazard classification. Currently, 11 dams have a condition assessment of poor or unsatisfactory.
The average dam in Strafford County is 99 years old. The most common purpose is recreation. The tallest dam is Lower Great Falls at 36 ft.
Explore more: Oldest dams in New Hampshire · Tallest dams · High risk dams · Largest reservoirs
| Dam | Hazard | Condition | Height (ft) | Purpose | Year |
|---|---|---|---|---|---|
| Bellamy Reservoir Dam | High | Satisfactory | 35 | Water Supply | 1962 |
| Rochester Reservoir Dam | High | Satisfactory | 26 | Water Supply | 1935 |
| Bow Lake Dam | High | Poor | 24 | Recreation | 1832 |
| Merrymeeting Lake Dam | High | Poor | 22 | Recreation | 1924 |
| Jones Dam | High | Poor | 21 | Recreation | 1924 |
| Jones Pond Dam | High | Satisfactory | 19 | Recreation | 1981 |
| Milton Three Ponds Dam | High | Poor | 19 | Recreation | 1824 |
| Sunrise Lake Dam | High | Satisfactory | 19 | Recreation | 1877 |
| Durham Reservoir Dam | High | Satisfactory | 17 | Recreation | 1930 |
| Swains Lake Dam | High | Satisfactory | 17 | Recreation | 1890 |
| Farmington Levee | High | Fair | 15 | Flood Risk Reduction | 1956 |
| Marchs Pond Dam | High | Satisfactory | 8 | Recreation | 1840 |
| Rochester Reservoir Dike Spillway | High | Satisfactory | 2 | Water Supply | 1935 |
| Lower Great Falls | Significant | Satisfactory | 36 | Hydroelectric | 1984 |
| Milton Leatherboard Dam | Significant | Poor | 32 | Recreation | 1904 |
| Wiswall Dam | Significant | Fair | 22 | Recreation | 1911 |
| Oyster Reservoir Dam | Significant | Fair | 21 | Water Supply | 1934 |
| Milton Waste Water Lagoons Dam | Significant | Fair | 20 | Other | 1985 |
| Hatfields | Significant | Satisfactory | 20 | Hydroelectric | 1937 |
| Rollinsford | Significant | Satisfactory | 20 | Hydroelectric | 1910 |
| Baxter Lake Main Dam | Significant | Fair | 19 | Recreation | 1923 |
| Ayers Pond Dam | Significant | Fair | 18 | Recreation | 1810 |
| Somersworth | Significant | Satisfactory | 17 | Hydroelectric | 1929 |
| Gonic Dam | Significant | Fair | 16 | Recreation | 1935 |
| Beards Creek Dam | Significant | Satisfactory | 16 | Recreation | 1953 |
| Thornwood Commons Pond Dam | Significant | Satisfactory | 16 | Fish and Wildlife Pond | 1961 |
| Upper City Dam | Significant | Fair | 14 | Recreation | 1920 |
| Kenneth Hill Pond Dam | Significant | Poor | 12 | Fish and Wildlife Pond | 1970 |
| Camp Foss Sewage Lagoon Dam | Significant | Poor | 10 | Other | 1979 |
| Rochester Sewage Lagoon Dam | Significant | Satisfactory | 10 | Other | 1980 |
| Cocheco Falls | Significant | Satisfactory | 9 | Hydroelectric | 1930 |
| Unh Water Treament Residual Lagoons | Significant | Satisfactory | 5 | Other | 2017 |
| Berry Brook Reservoir Dam | Low | Fair | 28 | Recreation | 1930 |
| Pickering Ponds Dam | Low | Not Rated | 24 | Other | 1980 |
| Spaulding Pond Dam | Low | Satisfactory | 19 | Hydroelectric | 1899 |
| South Berwick | Low | Satisfactory | 18 | Hydroelectric | 1923 |
| Waumbek Dam | Low | Satisfactory | 17 | Recreation | 1880 |
| Rowe Dam | Low | Satisfactory | 15 | Recreation | 1935 |
| Downing Pond Dam | Low | Fair | 15 | Recreation | 1921 |
| South Milton | Low | Satisfactory | 15 | Hydroelectric | 1893 |
| Pine Rock Farm Pond Dam | Low | Fair | 12 | Recreation | 1966 |
| Watson | Low | Satisfactory | 12 | Hydroelectric | 1900 |
| Mill Pond Dam | Low | Poor | 10 | Recreation | 1935 |
| Currier Pond Dam | Low | Poor | 10 | Recreation | 1963 |
| Baxter Lake East Dike | Low | Fair | 10 | Recreation | 1923 |
| Baxter Lake Center Dike | Low | Fair | 10 | Recreation | 1923 |
| Boston Felt | Low | Satisfactory | 10 | Hydroelectric | 1983 |
| Nippo Pond Dam | Low | Fair | 9 | Recreation | 1930 |
| Club Pond Dam | Low | Not Rated | 9 | Recreation | 1866 |
| Richardson Pond Dam | Low | Poor | 8 | Fish and Wildlife Pond | 1935 |
| Wadleigh Falls Dam | Undetermined | Poor | 13 | Recreation | 1906 |