Agua Chinon Reservoir Report

Last Updated: December 5, 2025

Agua Chinon, located in El Toro, California, is a vital structure designed for debris control and flood risk reduction along the Agua Chinon Wash.


°F

°F

mph

Wind

%

Humidity

Summary

Completed in 1998, this earth dam stands at a height of 41 feet and spans 480 feet in length, with a storage capacity of 256 acre-feet. The dam serves to protect the surrounding area from potential hazards, as it is regulated and inspected by the Department of Water Resources (DWR) for safety and enforcement.

With a high hazard potential but assessed as satisfactory in condition, Agua Chinon undergoes regular inspections and has an emergency action plan in place. The dam's primary purpose is to manage debris and reduce flood risks, making it a crucial asset for water resource management in Orange County. Its strategic location, close to the Los Angeles District, underscores its significance in safeguarding the local community and environment from natural disasters.

For water resource and climate enthusiasts, Agua Chinon stands as a testament to effective infrastructure that balances the need for flood protection with environmental conservation. As a state-regulated structure with a history of successful risk management, it exemplifies the importance of sustainable water resource practices in mitigating the impacts of climate change. The ongoing maintenance and oversight of Agua Chinon ensure that it continues to play a vital role in safeguarding the region's water resources for years to come.

Year Completed

1998

Dam Length

480

Dam Height

41

River Or Stream

Agua Chinon Wash

Primary Dam Type

Earth

Surface Area

16

Hydraulic Height

30.5

Drainage Area

2.17

Nid Storage

256

Hazard Potential

High

Nid Height

41
       
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.