First Connecticut Lake Dam

High HazardFair ConditionEmergency Action Plan: Yes

Location

StateNew Hampshire
CountyCoos
Nearest CityPITTSBURG
River/StreamCONNECTICUT RIVER
Coordinates45.08860, -71.28910

Physical Characteristics

Dam TypeEarth
NID Height56 ft
Dam Height56 ft
Dam Length1,117 ft
Year Completed1930 (96 years old)

Storage & Hydraulics

NID Storage114,000 acre-ft
Max Storage114,000 acre-ft
Normal Storage76,493 acre-ft
Surface Area3,125 acres
Drainage Area83 sq mi

Ownership & Safety

PurposeHydroelectric
OwnerGREAT RIVER HYDRO LLC
Owner TypePrivate
Hazard ClassificationHigh
Condition AssessmentFair
Last Inspection08/24/2022
Emergency Action PlanYes

Identifiers

NID IDNH00186
Federal IDNH00186
More InfoState Dam Safety Program

Nearby Dams

First Conn Lake South Bay Dike 2.3 mi Low Back Lake Dam 3.7 mi Low Coon Brook Bog Dam 4.1 mi Low Murphy Dam 5.4 mi High Godbout Pond West Dike 5.4 mi Undetermined Big Brook Bog Dam 5.8 mi Significant Second Connecticut Lake Dam 6.4 mi Low Shehan Pond Dam 6.8 mi Low Moose Falls Dam 8.6 mi Significant East Inlet Dam 8.8 mi Low