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Lower Bear Dam
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Lower Bear Dam Share Share

Overview Share Share
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Pioneer, California
Hydroelectric
Privately owned
Built in 1952

Lower Bear Dam is a rockfill dam built on the Bear River and is located in Pioneer, California. It was built in 1952 for the purpose of hydroelectric.

The dam is privately owned by Pacific Gas and Electric Company.

Location
Lower Bear Dam
Pioneer, California, U.S.
Dam type
Rockfill
Dam type
Hydroelectric
Purpose
Unknown
Foundation type
Unknown
Core type
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Ownership Share Share
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Pacific Gas and Electric Company
Owner
Private

Lower Bear Dam is privately owned by Pacific Gas and Electric Company.

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Construction Share Share
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1952
Completed
Bear River
River built on
Lower Bear Dam was built in 1952.
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Metrics Share Share
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Summary
Dam length 1,844 feet
Dam height 245 feet
Structural height 245 feet
Hydraulic height 125 feet
Max discharge 22,210 cubic feet per second
Max storage 52,025 acre feet
Normal storage 49,100 acre feet
Surface area 746 acres
Drainage area 37 square miles
1,844 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.

245 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.

245 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.

125 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.

22,210 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.

52,025 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.

49,100 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.

746 acres
Surface area

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

37 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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Safety Share 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.

8/2/2017
Most recent inspection date

Inspections are every 1 ear.

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About Share Share
Distance to nearest town (miles) 19
Latitude 38
Longitude -120
NID ID (National ID) CA00409
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