Long Pond

Long Pond is a concrete dam located in Penobscot County, Maine, built in 1949. It carries a Low hazard potential classification.

About Long Pond

The primary purpose of Long Pond 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 Haskell Lumber Inc. (private). It impounds the Cambolasse Stream.

The dam stands 14 feet tall and stretches 425 feet across, creates a reservoir covering 825 acres, has a maximum storage capacity of 4,220 acre-feet, and collects water from a drainage area of 14 square miles. Completed in 1949, the structure is well-established, with more than 75 years of service.

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.

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Low HazardNot Rated ConditionEmergency Action Plan: Not Required

Location

StateMaine
CountyPenobscot
River/StreamCambolasse Stream
Coordinates45.41000, -68.43500

Physical Characteristics

Dam TypeConcrete
NID Height14 ft
Dam Height14 ft
Dam Length425 ft
Year Completed1949 (77 years old)

Storage & Hydraulics

NID Storage4,220 acre-ft
Max Storage4,220 acre-ft
Normal Storage3,070 acre-ft
Surface Area825 acres
Drainage Area14 sq mi

Ownership & Safety

PurposeHydroelectric
OwnerHaskell Lumber Inc.
Owner TypePrivate
Hazard ClassificationLow
Condition AssessmentNot Rated
Emergency Action PlanNot Required

Identifiers

NID IDME00177
Federal IDME00177
More InfoState Dam Safety Program

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