Dams in Hancock County, Maine
36Total Dams
7High Hazard
4Significant
Dam Safety in Hancock County, Maine
Hancock County has 36 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 4 carry a significant hazard classification. Currently, 8 dams have a condition assessment of poor or unsatisfactory.
The average dam in Hancock County is 104 years old. The most common purpose is recreation. The tallest dam is Ellsworth at 62 ft.
Explore more: Oldest dams in Maine · Tallest dams · High risk dams · Largest reservoirs
| Dam | Hazard | Condition | Height (ft) | Purpose | Year |
|---|---|---|---|---|---|
| Ellsworth | High | Satisfactory | 62 | Hydroelectric | 1907 |
| Graham Lake Flood Control | High | Satisfactory | 58 | Hydroelectric | 1994 |
| Graham Lake Dam | High | Satisfactory | 43 | Hydroelectric | 1924 |
| Silver Lake | High | Unsatisfactory | 29 | Water Supply | 1930 |
| Toddy Pond | High | Unsatisfactory | 16 | Flood Risk Reduction | 1900 |
| Alamoosook Lake | High | Unsatisfactory | 15 | Recreation | 1930 |
| Lower West Bay Pond | High | Poor | 12 | Recreation | 1920 |
| Branch Lake | Significant | Fair | 15 | Hydroelectric | 1911 |
| Lily Pond | Significant | Poor | 11 | Water Supply | 1948 |
| Ulmer Brook | Significant | Unsatisfactory | 10 | Recreation | 1981 |
| Long Pond | Significant | Poor | 8 | Hydroelectric | 1930 |
| Mill Pond | Low | Not Rated | 20 | Recreation | 1915 |
| Fosters Pond | Low | Not Rated | 16 | Recreation | 1920 |
| Orland Village | Low | Not Rated | 15 | Other | 1930 |
| Craig Pond Dam | Low | Fair | 13 | Recreation | 1891 |
| Upper Somes | Low | Not Rated | 12 | Hydroelectric | 1900 |
| Lower Hadlock Pond | Low | Satisfactory | 12 | Water Supply | 1934 |
| Hamilton Pond | Low | Not Rated | 11 | Fire Protection, Stock, Or Small Fish Pond | 1920 |
| Lyle Frost Wma | Low | Not Rated | 11 | Recreation | 1900 |
| Philips Lake | Low | Poor | 10 | Other | 1900 |
| Little Echo Lake | Low | Not Rated | 10 | Other | 1900 |
| Thurston Pond | Low | Not Rated | 9 | Flood Risk Reduction | 1900 |
| Patten Brook | Low | Not Rated | 9 | Recreation | 1900 |
| Lower Lead Mountain | Low | Not Rated | 9 | Recreation | 1900 |
| Upper West Bay Pond | Low | Not Rated | 9 | Fish and Wildlife Pond | 1978 |
| Barbless Pond | Low | Not Rated | 8 | Recreation | 1900 |
| Nicatous Stream | Low | Not Rated | 8 | Recreation | 1974 |
| Lower Sabao Lake | Low | Not Rated | 8 | Recreation | 1900 |
| Eagle Lake | Low | Satisfactory | 8 | Hydroelectric | 1935 |
| Green Lake | Low | Satisfactory | 8 | Hydroelectric | 1911 |
| The Tarn | Low | Not Rated | 7 | Recreation | 1900 |
| Leighton Brook | Low | Not Rated | 7 | Other | |
| Jordan Pond | Low | Not Rated | 7 | Water Supply | 1920 |
| Beech Hill Pond | Low | Not Rated | 7 | Recreation | |
| Seal Cove Pond | Low | Not Rated | 7 | Recreation | 1900 |
| Jones Pond | Low | Not Rated | 5 | Flood Risk Reduction | 1920 |