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Rocky Gorge Upper Dam
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Rocky Gorge Upper Dam Share
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Overview Share
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South Berwick, Maine
Hydroelectric
Privately owned
Built in 1900

Rocky Gorge Upper Dam is built on the Great Works River and is located in South Berwick, Maine. It was built in 1900 for the purpose of hydroelectric.

The dam is privately owned by Rocky Gorge Corporation.

Location
Rocky Gorge Upper Dam
South Berwick, Maine, U.S.
Dam type
Other
Dam type
Hydroelectric
Purpose
Unknown
Foundation type
Unknown
Core type
Ownership Share
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Rocky Gorge Corporation
Owner
Private

Rocky Gorge Upper Dam is privately owned by Rocky Gorge Corporation.

Construction Share
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1900
Completed
Great Works River
River built on
Rocky Gorge Upper Dam was built in 1900.
Metrics Share
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Summary
Dam length 140 feet
Dam height 10 feet
Max discharge 5,600 cubic feet per second
Max storage 141 acre feet
Normal storage 141 acre feet
Surface area 43 acres
Drainage area 85 square miles
140 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.

5,600 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.

141 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.

141 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.

43 acres
Surface area

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

85 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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Low
Downstream potential hazard

Dams assigned the low hazard potential classification are those where failure or misoperation results in no probable loss of human life and low economic and/or environ-mental losses. Losses are principally limited to the owner’s property.

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.

6/28/2016
Most recent inspection date

Inspections are every 3 years.

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Distance to nearest town (miles) 1
Latitude 43
Longitude -70
NID ID (National ID) ME00391

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