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Farrar Marsh Dam
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Hillsborough, New Hampshire
Recreation
State owned
Built in 1978

Farrar Marsh Dam is built on the Sand Brook River and is located in Hillsborough, New Hampshire. It was built in 1978 for the purpose of recreation.

The state-owned dam is owned by the NH Fish and Game Department.

Location
Farrar Marsh Dam
Hillsborough, New Hampshire, U.S.
Dam type
Other
Dam type
Recreation
Purpose
Unknown
Foundation type
Unknown
Core type
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NH Fish and Game Department
Owner
State

The state-owned dam is owned by the NH Fish and Game Department.

Construction Share
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1978
Completed
Sand Brook River
River built on
Farrar Marsh Dam was built in 1978.
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Summary
Dam length 110 feet
Dam height 10 feet
Max discharge 1,565 cubic feet per second
Max storage 654 acre feet
Normal storage 154 acre feet
Surface area 140 acres
Drainage area 6 square miles
110 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.

10 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.

1,565 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.

654 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.

154 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.

140 acres
Surface area

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

6 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.

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Significant
Downstream potential hazard

Dams assigned the significant hazard potential classification are those dams where failure or mis-operation results in no probable loss of human life but can cause economic loss, environment damage, disruption of lifeline facilities, or impact other concerns. Significant hazard potential classification dams are often located in predominantly rural or agricultural areas but could be located in areas with population and significant infrastructure.

Not required
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.

10/16/2013
Most recent inspection date

Inspections are every 6 years.

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Latitude 43
Longitude -71
NID ID (National ID) NH00501

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