Channel Diversion Dike Reservoir Report

Last Updated: December 5, 2025

The Channel Diversion Dike, located in Los Angeles, California, was completed in 1940 with the primary purpose of flood risk reduction along the Storm Dr Channel.


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Summary

This earth dam stands at 42 feet high and has a hydraulic height of 34.4 feet, providing a storage capacity of 437 acre-feet. With a low hazard potential and a satisfactory condition assessment as of September 2017, the dam is regulated by the Department of Water Resources (DWR) under the Safety of Dams program, ensuring regular inspections and enforcement of safety measures.

Owned and operated by the local government, the Channel Diversion Dike plays a crucial role in managing stormwater and protecting the surrounding areas from potential flooding events. Despite its age, the dam continues to serve its purpose effectively, with a last inspection date in November 2020 indicating ongoing maintenance and oversight. Furthermore, the dam's emergency action plan (EAP) status and risk management measures are currently not specified, suggesting a potential area for improvement in enhancing preparedness and response protocols in case of emergencies.

As a key infrastructure asset in flood risk mitigation, the Channel Diversion Dike remains a vital component of water resource management in the region. With its strategic location and design, the dam contributes to the overall safety and resilience of the community against the impacts of extreme weather events and changing climate patterns. Continued monitoring and proactive maintenance of this structure are essential to ensure its long-term functionality and effectiveness in safeguarding the surrounding areas from potential flood hazards.

Year Completed

1940

Dam Length

390

Dam Height

42

River Or Stream

Storm Dr Channel

Primary Dam Type

Earth

Surface Area

28

Hydraulic Height

34.4

Drainage Area

6.3

Nid Storage

437

Hazard Potential

Low

Nid Height

42
       
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.