Little Cohas Brook Dam

Low HazardSatisfactory ConditionEmergency Action Plan: Not Required

Location

StateNew Hampshire
CountyRockingham
Nearest CityLONDONDERRY
River/StreamLITTLE COHAS BROOK
Coordinates42.91770, -71.41690

Physical Characteristics

Dam TypeConcrete
NID Height10 ft
Dam Height10 ft
Dam Length70 ft
Year Completed1953 (73 years old)

Storage & Hydraulics

NID Storage867 acre-ft
Max Storage867 acre-ft
Normal Storage39 acre-ft
Surface Area17 acres
Drainage Area6 sq mi
Max Discharge1,011 cfs

Ownership & Safety

PurposeRecreation
OwnerNH DOT
Owner TypeState
Hazard ClassificationLow
Condition AssessmentSatisfactory
Last Inspection10/17/2022
Emergency Action PlanNot Required

Identifiers

NID IDNH00509
Federal IDNH00509
More InfoState Dam Safety Program

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