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First Connecticut Lake Dam
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First Connecticut Lake Dam Share
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Overview Share
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Pittsburg, New Hampshire
Hydroelectric
Privately owned
Built in 1930

First Connecticut Lake Dam is built on the Connecticut River and is located in Pittsburg, New Hampshire. It was built in 1930 for the purpose of hydroelectric.

The dam is privately owned by Great River Hydro LLC.

Location
First Connecticut Lake Dam
Pittsburg, New Hampshire, U.S.
Dam type
Other
Dam type
Hydroelectric
Purpose
Unknown
Foundation type
Unknown
Core type
Ownership Share
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Great River Hydro LLC
Owner
Private

First Connecticut Lake Dam is privately owned by Great River Hydro LLC.

Construction Share
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1930
Completed
Connecticut River
River built on
First Connecticut Lake Dam was built in 1930.
Metrics Share
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Summary
Dam length 1,117 feet
Dam height 56 feet
Max discharge 20,600 cubic feet per second
Max storage 114,000 acre feet
Normal storage 91,000 acre feet
Surface area 2,800 acres
Drainage area 82 square miles
1,117 feet
Dam length

Length of the dam is defined as the length along the top of the dam. This also includes the spillway, powerplant, navigation lock, fish pass, etc., where these form part of the length of the dam. If detached from the dam, these structures should not be included.

56 feet
Dam height

Height of the dam is defined as the vertical distance between the lowest point on the crest of the dam and the lowest point in the original streambed.

20,600 cubic feet per second
Max discharge

Number of cubic feet per second the spillway is capable of discharging when the reservoir is at its maximum designed water surface elevation.

114,000 acre feet
Max storage

Maximum storage is defined as the total storage space in a reservoir below the maximum attainable water surface elevation, including any surcharge storage.

91,000 acre feet
Normal storage

Normal storage is defined as the total storage space in a reservoir below the normal retention level, including dead and inactive storage and excluding any flood control or surcharge storage. For normally dry flood control dams, the normal storage will be a zero value.

2,800 acres
Surface area

Surface area, in acres, of the impoundment at its normal retention level.

82 square miles
Drainage area

Drainage area of the dam, in square miles, which is defined as the area that drains to a particular point (in this case, the dam) on a river or stream.

Safety Share
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High
Downstream potential hazard

Dams assigned the high hazard potential classification are those where failure or mis-operation will probably cause loss of human life.

Has emergency action plan
Emergency action plan

An emergency action plan is defined as a plan of action to be taken to reduce the potential for property damage and loss of life in an area affected by a dam failure or large flood.

6/16/2015
Most recent inspection date

Inspections are every 4 years.

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Latitude 45
Longitude -71
NID ID (National ID) NH00186

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