Macallen Dam

High HazardSatisfactory ConditionEmergency Action Plan: Yes

Location

StateNew Hampshire
CountyRockingham
Nearest CityNEWMARKET
River/StreamLAMPREY RIVER
Coordinates43.08110, -70.93470

Physical Characteristics

Dam TypeConcrete
NID Height27 ft
Dam Height27 ft
Dam Length150 ft
Year Completed1887 (139 years old)

Storage & Hydraulics

NID Storage1,740 acre-ft
Max Storage1,740 acre-ft
Normal Storage480 acre-ft
Surface Area120 acres
Drainage Area211 sq mi
Max Discharge10,930 cfs

Ownership & Safety

PurposeRecreation
OwnerTOWN OF NEWMARKET
Owner TypeLocal Government
Hazard ClassificationHigh
Condition AssessmentSatisfactory
Last Inspection08/02/2022
Emergency Action PlanYes

Identifiers

NID IDNH00365
Federal IDNH00365
More InfoState Dam Safety Program

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