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Gregory Lake Dam
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Gregory Lake Dam Share
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Elmendorf Afb, Alaska
Recreation
Federal ownership

Gregory Lake Dam is an earth dam built on the Six Mile Creek River and is located in Elmendorf Afb, Alaska. It was built for the purpose of recreation.

The dam is under federal ownership and is owned by the Usaf Pacaf. It is also known as Six Mile Reservoir.

Location
Gregory Lake Dam
Elmendorf Afb, Alaska, U.S.
Dam type
Earth
Dam type
Recreation
Purpose
Unknown
Foundation type
Unknown
Core type
Ownership Share
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Usaf Pacaf
Owner
Federal

Gregory Lake Dam is under federal ownership and is owned by the Usaf Pacaf.

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Summary
Dam length 1,848 feet
Dam height 16 feet
Structural height 16 feet
Hydraulic height 10 feet
Max discharge 300 cubic feet per second
Max storage 375 acre feet
Normal storage 350 acre feet
Surface area 745 acres
Drainage area 6 square miles
1,848 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.

16 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.

16 feet
Structural height

Structural height of the dam is defined as the vertical distance from the lowest point of the excavated foundation to the top of the dam. Top of dam refers to the parapet wall and not the crest.

10 feet
Hydraulic height

Hydraulic height of the dam is defined as the vertical difference between the maximum design water level and the lowest point in the original streambed.

300 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.

375 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.

350 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.

745 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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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.

9/5/2013
Most recent inspection date

Inspections are every 5 years.

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Also known as Six Mile Reservoir
Latitude 61
Longitude -149
NID ID (National ID) AK00036

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