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Contra Loma Dike No. 2 Dam
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Contra Loma Dike No. 2 Dam Share
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Overview Share
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Antioch, California
Federal ownership
Built in 1967

Contra Loma Dike No. 2 Dam is an earth dam built on the San Joaq River OS and is located in Antioch, California. It was built in 1967 .

The dam is under federal ownership and is owned by the Reclamation.

Location
Contra Loma Dike No. 2 Dam
Antioch, California, U.S.
Dam type
Earth
Dam type
Other
Purpose
Unknown
Foundation type
Bituminous Concrete
Core type
Ownership Share
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Reclamation
Owner
Federal

Contra Loma Dike No. 2 Dam is under federal ownership and is owned by the Reclamation.

Construction Share
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1967
Completed
San Joaq River OS
River built on
Contra Loma Dike No. 2 Dam was built in 1967.
Metrics Share
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Summary
Dam length 360 feet
Dam height 25 feet
Structural height 25 feet
Hydraulic height 11 feet
Max storage 2,630 acre feet
Normal storage 2,095 acre feet
Surface area 81 acres
Drainage area 1 square miles
360 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.

25 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.

25 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.

11 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.

2,630 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.

2,095 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.

81 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.

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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.

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.

10/10/2014
Most recent inspection date

Inspections are every 1 ear.

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Distance to nearest town (miles) 1
Latitude 37
Longitude -121
NID ID (National ID) CA10143

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