Green Lake
Key Takeaway
Green Lake is classified as low hazard in Maine. It was completed in 1911 and is 115 years old. Its primary use is hydroelectric.
Physical Details
| Dam Height | 8 ft (taller than 4.6% in ME) |
| Dam Length | 273 ft |
| Dam Type | Masonry |
| Max Storage | 107.0K acre-ft |
| Normal Storage | 107.0K acre-ft |
| Surface Area | 2,989 acres |
| Drainage Area | 58 sq mi |
| Max Discharge | 3,200 cfs |
| Year Completed | 1911 (115 years old) |
| NID ID | ME00266 |
Safety Information
No probable loss of human life and low economic/environmental losses expected.
Hazard potential describes downstream consequences of failure, not the dam's current condition. What does this mean?
Ownership
Green Lake Water Power Company
Private
Nearby Dams
Graham Lake Flood Control
Hancock, ME
High Hazard 58 ftGraham Lake Dam
Hancock, ME
High Hazard 43 ftBeech Hill Pond
Hancock, ME
Low Hazard 7 ftEllsworth
Hancock, ME
High Hazard 62 ftBranch Lake
Hancock, ME
Significant Hazard 15 ftPatten Brook
Hancock, ME
Low Hazard 9 ftFosters Pond
Hancock, ME
Low Hazard 16 ftLyle Frost Wma
Hancock, ME
Low Hazard 11 ftFrequently Asked Questions
What is the hazard classification of Green Lake?
Green Lake is classified as Low Hazard. No probable loss of human life and low economic/environmental losses expected. This classification refers to the potential downstream consequences of a failure, not the dam's current structural condition.
Who owns and operates Green Lake?
Green Lake is owned by Green Lake Water Power Company (Private). The owner is responsible for maintenance, inspections, and compliance with dam safety regulations.
When was Green Lake built?
Green Lake was completed in 1911, making it 115 years old. Many U.S. dams were built between the 1930s and 1970s during a period of major infrastructure investment.
What is the primary purpose of Green Lake?
Green Lake serves the following purposes: Hydroelectric, Fire Protection, Stock, Or Small Fish Pond, Fish And Wildlife Pond, Recreation, Water Supply. Many dams in the U.S. are multi-purpose, supporting flood control, water supply, recreation, and other uses.
How tall is Green Lake?
Green Lake has a dam height of 8 ft. Dam height is measured from the natural streambed at the downstream toe to the top of the dam, and may differ from the visible height.
When was Green Lake last inspected?
Green Lake was last inspected on September 27, 2018. Inspection dates indicate when a formal review occurred, not the results of that inspection.