Headworks Reservoir East Reservoir Report

Last Updated: December 5, 2025

Headworks Reservoir East, located in Los Angeles, California, is a crucial water resource infrastructure owned by the local government.


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Summary

Completed in 2016, this offstream reservoir has a maximum storage capacity of 165 acre-feet and serves primarily for water supply purposes. With a dam height of 32.17 feet and a hydraulic height of 29.5 feet, the reservoir plays a key role in ensuring reliable water availability for the region.

Managed by the California Department of Water Resources (DWR), Headworks Reservoir East is regulated and inspected regularly to maintain its safety and operational efficiency. The dam is classified as low hazard potential with a satisfactory condition assessment as of September 2017. In the event of emergencies, the reservoir is equipped with emergency action plans, although details on their preparation and guidelines adherence are not specified in the available data. Despite its critical importance for water supply, the reservoir's risk assessment and management measures are not detailed, leaving room for further investigation and potential enhancements in the future.

Overall, Headworks Reservoir East stands as a vital component of the water infrastructure in Los Angeles, contributing to water supply reliability in the region. As climate change continues to impact water resources, the proper maintenance and management of such reservoirs become increasingly important to ensure water security for the community. With ongoing regulatory oversight and inspection, Headworks Reservoir East remains a key asset in the local government's efforts to safeguard water resources and address the challenges posed by a changing climate.

Year Completed

2016

Dam Length

2095

Dam Height

32.17

River Or Stream

Offstream

Primary Dam Type

Other

Surface Area

6.1

Hydraulic Height

29.5

Nid Storage

165

Hazard Potential

Low

Nid Height

32
       
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.