Pioneer

West Branch Sebasticook River· Somerset, Maine· Built 1890· Concrete· 12 ft tall
Low Hazard Hydroelectric Local Government

Key Takeaway

Pioneer is classified as low hazard in Maine. It was completed in 1890 and is 136 years old. Its primary use is hydroelectric.

Physical Details

Dam Height 12 ft (taller than 32.9% in ME)
Dam Length570 ft
Dam TypeConcrete
Max Storage250 acre-ft
Normal Storage250 acre-ft
Surface Area30 acres
Drainage Area320 sq mi
Max Discharge15,000 cfs
Year Completed1890 (136 years old)
NID IDME00110

Safety Information

Low Hazard

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?

Emergency Action Plan: No
Last Inspection: September 6, 2021
State Regulated: No

Ownership

Town of Pittsfield, ME

Local Government

Nearby Dams

Frequently Asked Questions

What is the hazard classification of Pioneer?

Pioneer 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 Pioneer?

Pioneer is owned by Town of Pittsfield, ME (Local Government). The owner is responsible for maintenance, inspections, and compliance with dam safety regulations.

When was Pioneer built?

Pioneer was completed in 1890, making it 136 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 Pioneer?

Pioneer serves the following purposes: Hydroelectric. Many dams in the U.S. are multi-purpose, supporting flood control, water supply, recreation, and other uses.

How tall is Pioneer?

Pioneer has a dam height of 12 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 Pioneer last inspected?

Pioneer was last inspected on September 6, 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.