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 assessed | 20 | Recreation | 1915 |
| Fosters Pond | Low | Not assessed | 16 | Recreation | 1920 |
| Orland Village | Low | Not assessed | 15 | Other | 1930 |
| Craig Pond Dam | Low | Fair | 13 | Recreation | 1891 |
| Upper Somes | Low | Not assessed | 12 | Hydroelectric | 1900 |
| Lower Hadlock Pond | Low | Satisfactory | 12 | Water Supply | 1934 |
| Hamilton Pond | Low | Not assessed | 11 | Fire Protection, Stock, Or Small Fish Pond | 1920 |
| Lyle Frost Wma | Low | Not assessed | 11 | Recreation | 1900 |
| Philips Lake | Low | Poor | 10 | Other | 1900 |
| Little Echo Lake | Low | Not assessed | 10 | Other | 1900 |
| Thurston Pond | Low | Not assessed | 9 | Flood Risk Reduction | 1900 |
| Patten Brook | Low | Not assessed | 9 | Recreation | 1900 |
| Lower Lead Mountain | Low | Not assessed | 9 | Recreation | 1900 |
| Upper West Bay Pond | Low | Not assessed | 9 | Fish and Wildlife Pond | 1978 |
| Barbless Pond | Low | Not assessed | 8 | Recreation | 1900 |
| Nicatous Stream | Low | Not assessed | 8 | Recreation | 1974 |
| Lower Sabao Lake | Low | Not assessed | 8 | Recreation | 1900 |
| Eagle Lake | Low | Satisfactory | 8 | Hydroelectric | 1935 |
| Green Lake | Low | Satisfactory | 8 | Hydroelectric | 1911 |
| The Tarn | Low | Not assessed | 7 | Recreation | 1900 |
| Leighton Brook | Low | Not assessed | 7 | Other | |
| Jordan Pond | Low | Not assessed | 7 | Water Supply | 1920 |
| Beech Hill Pond | Low | Not assessed | 7 | Recreation | |
| Seal Cove Pond | Low | Not assessed | 7 | Recreation | 1900 |
| Jones Pond | Low | Not assessed | 5 | Flood Risk Reduction | 1920 |