Green Lake
Green Lake is a masonry dam located in Hancock County, Maine, built in 1911. It carries a Low hazard potential classification and has a satisfactory condition assessment.
About Green Lake
The primary purpose of Green Lake is hydroelectric. The dam generates hydroelectric power by channeling water through turbines, converting the energy of flowing water into electricity. The dam is owned by Green Lake Water Power Company (private). It impounds the Reeds Brook near Ellsworth.
The dam stands 8 feet tall and stretches 273 feet across, creates a reservoir covering 2,989 acres, has a maximum storage capacity of 107,000 acre-feet, and collects water from a drainage area of 58 square miles. Completed in 1911, the structure is over a century old.
This dam has a low hazard potential classification, meaning that failure would cause minimal damage, limited primarily to the dam owner's property, with no expected loss of life. Its condition is rated satisfactory, indicating no existing or potential dam safety deficiencies are recognized. The most recent inspection on record was 09/27/2018.
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Location
| State | Maine |
| County | Hancock |
| Nearest City | Ellsworth |
| River/Stream | Reeds Brook |
| Coordinates | 44.62591, -68.44472 |
Physical Characteristics
| Dam Type | Masonry |
| NID Height | 8 ft |
| Dam Height | 8 ft |
| Dam Length | 273 ft |
| Year Completed | 1911 (115 years old) |
Storage & Hydraulics
| NID Storage | 107,000 acre-ft |
| Max Storage | 107,000 acre-ft |
| Normal Storage | 107,000 acre-ft |
| Surface Area | 2,989 acres |
| Drainage Area | 58 sq mi |
| Max Discharge | 3,200 cfs |
| Spillway Type | Uncontrolled |
Ownership & Safety
| Purpose | Hydroelectric |
| Owner | Green Lake Water Power Company |
| Owner Type | Private |
| Hazard Classification | Low |
| Condition Assessment | Satisfactory |
| Last Inspection | 09/27/2018 |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | ME00266 |
| Federal ID | ME00266 |
| More Info | State Dam Safety Program |