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Big Dam
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Big Dam Share
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Overview Share
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Oregon
Water Supply
Federal ownership
Built in 1966

Big Dam is a gravity dam built on the Big Lake Offstream Trib River and is located in Oregon. It was built in 1966 for the purpose of water supply.

The dam is under federal ownership and is owned by the Doi BLM.

Location
Big Dam
Oregon, U.S.
Dam type
Gravity
Dam type
Water supply
Purpose
Unknown
Foundation type
Earth
Core type
Ownership Share
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Doi BLM
Owner
Federal

Big Dam is under federal ownership and is owned by the Doi BLM.

Construction Share
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1966
Completed
Big Lake Offstream Trib River
River built on
Big Dam was built in 1966.
Metrics Share
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Summary
Dam height 13 feet
Structural height 13 feet
Hydraulic height 12 feet
Normal storage 674 acre feet
Surface area 46 acres
Drainage area 1 square miles
13 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.

13 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.

12 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.

674 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.

46 acres
Surface area

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

1 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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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.

9/14/2012
Most recent inspection date

Inspections are every 5 years.

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Latitude 42
Longitude -120
NID ID (National ID) OR00757

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