Alamoosook Lake

Narramissic River· Hancock, Maine· Built 1930· Concrete· 15 ft tall
High Hazard Recreation Other Water Supply Private

Key Takeaway

Alamoosook Lake is classified as high hazard in Maine. It was completed in 1930 and is 96 years old. Its primary use is recreation. High hazard means loss of life is likely if the dam fails — it does not indicate the dam's current condition. Learn more.

Physical Details

Dam Height 15 ft (taller than 51.7% in ME)
Dam Length165 ft
Dam TypeConcrete
Max Storage2.8K acre-ft
Normal Storage2.2K acre-ft
Surface Area1,133 acres
Drainage Area0 sq mi
Year Completed1930 (96 years old)
NID IDME00144

Safety Information

High Hazard

Loss of human life is likely if the dam fails.

Hazard potential describes downstream consequences of failure, not the dam's current condition. What does this mean?

Emergency Action Plan: Yes
Last Inspection: October 12, 2021
State Regulated: Yes
Regulatory Agency: MEMA

Ownership

Bucksport Generation, LLC

Private

Nearby Dams

Frequently Asked Questions

What is the hazard classification of Alamoosook Lake?

Alamoosook Lake is classified as High Hazard. Loss of human life is likely if the dam fails. This classification refers to the potential downstream consequences of a failure, not the dam's current structural condition.

Who owns and operates Alamoosook Lake?

Alamoosook Lake is owned by Bucksport Generation, LLC (Private). The owner is responsible for maintenance, inspections, and compliance with dam safety regulations.

When was Alamoosook Lake built?

Alamoosook Lake was completed in 1930, making it 96 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 Alamoosook Lake?

Alamoosook Lake serves the following purposes: Recreation, Other, Water Supply. Many dams in the U.S. are multi-purpose, supporting flood control, water supply, recreation, and other uses.

How tall is Alamoosook Lake?

Alamoosook Lake has a dam height of 15 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 Alamoosook Lake last inspected?

Alamoosook Lake was last inspected on October 12, 2021. Inspection dates indicate when a formal review occurred, not the results of that inspection.

Data from the National Inventory of Dams (NID) maintained by the US Army Corps of Engineers. Dam conditions may have changed since the last update. This site is not affiliated with USACE. Do not use for emergency planning — contact your local dam safety program.