San Gabriel Dam, California, USA

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Quick Facts About San Gabriel Dam

Location: Los Angeles, California
Coordinates: 34.2065, -117.8592
River: San Gabriel River
Primary Purpose: Hydroelectric
Type: Earth Rockfill
Commissioned: 1937
Dam Height: 320 ft (98 m)
Dam Length: 1,500 ft (457 m)
Dam Capacity: 45,832 acre-ft (56,533 Ml)
Condition Assessment: Not Available

San Gabriel Dam Map

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San Gabriel Dam Information

San Gabriel Dam is an earth rockfill dam located about 2 miles from Azusa, Los Angeles, California.

The dam, which is on the San Gabriel River, was primarily built for Hydroelectric purposes, but also serves for Flood Risk Reduction benefits.

The dam was designed by and commissioned in 1937 and is currently owned by Los Angeles County Flood Control District.

San Gabriel Dam Structure

The San Gabriel Dam is approximately 1,500 feet (457 m) long, 320 feet (98 m) high and has a structural volume of cubic yards (0 cubic metres).

San Gabriel Dam Storage Capacity & Surface Area

The reservoir has a normal storage capacity of 3,378 acre-ft (4,167 Ml) and maximum capacity of 45,832 acre-ft (56,533 Ml).

The surface area of the reservoir is acres (0 ha) and the total catchment area is 203 square miles (526 square kilometres).

San Gabriel Dam Spillway

The dam spillway has a maximum discharge capacity of 297000 cubic feet per second (8410 cubic metres per second).

San Gabriel Dam Compared to Four Famous American Dams

San Gabriel Dam
Los Angeles, California
Hoover Dam
Clark County, Nevada
Grand Coulee Dam
Okanogan County, Washington
Theodore Roosevelt Dam
Maricopa County, Arizona
Glen Canyon Dam
Coconino County, Arizona
Height (ft) 320 730 550 357 216
Length (Ft) 1,500 1,244 5,673 6,920 1,565
Storage Volume (acre-ft) 45,832 30,237,000 9,562,000 3,540,000 29,875,000
Drainage Area (sq miles) 203 167,800 74,100 3,611 108,355

San Gabriel Dam Weather

Current Conditions at San Gabriel Dam

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7-Day Forecast for San Gabriel Dam

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San Gabriel Dam Frequently Asked Questions

In which state is the San Gabriel Dam?

San Gabriel Dam is in California.

In which county is the San Gabriel Dam?

San Gabriel Dam is in Los Angeles County.

How high is the San Gabriel Dam?

San Gabriel Dam is 320 feet high.

How long is the San Gabriel Dam?

San Gabriel Dam is 1,500 feet long.

Condition Assessment Classification

Satisfactory

No existing or potential dam safety deficiencies are recognized. Acceptable performance is expected under all loading conditions (static, hydrologic, seismic) in accordance with the minimum applicable state or federal regulatory criteria or tolerable risk guidelines.

Fair

No existing dam safety deficiencies are recognized for normal operating conditions. Rare or extreme hydrologic and/or seismic events may result in a dam safety deficiency. Risk may be in the range to take further action. Note: Rare or extreme event is defined by the regulatory agency based on their minimum

Poor

A dam safety deficiency is recognized for normal operating conditions which may realistically occur. Remedial action is necessary. POOR may also be used when uncertainties exist as to critical analysis parameters which identify a potential dam safety deficiency. Investigations and studies are necessary.

Unsatisfactory

A dam safety deficiency is recognized that requires immediate or emergency remedial action for problem resolution.

Not Rated

The dam has not been inspected, is not under state or federal jurisdiction, or has been inspected but, for whatever reason, has not been rated.

Not Available

Dams for which the condition assessment is restricted to approved government users.

Hazard Potential Classification

High

Dams assigned the high hazard potential classification are those where failure or mis-operation will probably cause loss of human life.

Significant

Dams assigned the significant hazard potential classification are those dams where failure or mis-operation results in no probable loss of human life but can cause economic loss, environment damage, disruption of lifeline facilities, or impact other concerns. Significant hazard potential classification dams are often located in predominantly rural or agricultural areas but could be in areas with population and significant infrastructure.

Low

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

Undetermined

Dams for which a downstream hazard potential has not been designated or is not provided.

Not Available

Dams for which the downstream hazard potential is restricted to approved government users.

Source: National Inventory of Dams

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