Stone Canyon Reservoir Report

Last Updated: December 4, 2025

Stone Canyon, also known as Stone Canyon Reservoir, is a critical water supply infrastructure located in Westwood Village, California.


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Summary

Managed by the local government, this earth dam structure was completed in 1924 and stands at a height of 188 feet, with a maximum storage capacity of 10,372 acre-feet. The reservoir serves the primary purpose of water supply, drawing from the Stone Canyon Creek and covering a surface area of 138 acres within a drainage area of 1.4 square miles.

Despite its age, Stone Canyon Reservoir has been regularly inspected and maintained to ensure its satisfactory condition and high hazard potential is managed effectively. The dam is regulated by the Department of Water Resources and subject to state permitting, inspection, and enforcement. With its strategic location and historical significance, Stone Canyon plays a crucial role in water resource management in Los Angeles County, offering a reliable source of water for the surrounding communities while adhering to strict safety standards and guidelines.

Enthusiasts of water resources and climate will appreciate the resilience and functionality of Stone Canyon Reservoir, as it continues to provide essential water supply services in a region prone to droughts and water scarcity. The dam's impressive hydraulic height of 174.8 feet and its association with the Stone Canyon Creek highlight its importance in sustaining the local ecosystem and supporting sustainable water management practices. As a key component of California's water infrastructure, Stone Canyon stands as a testament to the state's commitment to ensuring reliable and safe water resources for its residents.

Year Completed

1924

Dam Length

1150

Dam Height

188

River Or Stream

Stone Canyon Cr

Primary Dam Type

Earth

Surface Area

138

Hydraulic Height

174.8

Drainage Area

1.4

Nid Storage

10372

Hazard Potential

High

Nid Height

188
       
Seasonal Comparison

Weather Forecast

Dam Data Reference

Condition Assessment

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.