Great Stone

Low HazardSatisfactory ConditionEmergency Action Plan: Not Required

Location

StateMassachusetts
CountyEssex
Nearest CityLawrence
River/StreamMerrimack River
Coordinates42.70060, -71.16650

Physical Characteristics

Dam TypeMasonry
NID Height38 ft
Dam Height38 ft
Dam Length943 ft
Year Completed1848 (178 years old)

Storage & Hydraulics

NID Storage19,900 acre-ft
Max Storage19,900 acre-ft
Normal Storage19,900 acre-ft
Surface Area655 acres
Drainage Area4,660 sq mi
Max Discharge128,000 cfs
Spillway TypeUncontrolled

Ownership & Safety

PurposeHydroelectric
OwnerLawrence Hydroelectric Associates
Owner TypePrivate
Hazard ClassificationLow
Condition AssessmentSatisfactory
Last Inspection06/15/2022
Emergency Action PlanNot Required

Identifiers

NID IDMA00234
Federal IDMA00234
More InfoState Dam Safety Program

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