Sunnymead Ranch Reservoir Report

Last Updated: December 5, 2025

Sunnymead Ranch, located in Riverside, California, is a privately owned earth dam built in 1985 for the primary purpose of water supply.


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Summary

The dam stands at a height of 41 feet and has a hydraulic height of 37 feet, with a storage capacity of 400 acre-feet. Situated along the Reche Canyon stream, this dam also serves recreational purposes and covers a surface area of 35 acres.

Managed by the California state regulatory agency for dam safety, Sunnymead Ranch has a satisfactory condition assessment and a high hazard potential. Regular inspections are conducted, with the last one occurring in June 2020. The dam's emergency action plan status, inundation maps preparation, and risk management measures are currently undisclosed. Despite these uncertainties, Sunnymead Ranch remains a vital water resource infrastructure in the region, contributing to water supply and recreational activities for the community.

With its strategic location and crucial role in water supply, Sunnymead Ranch stands as a key feature in the water resource landscape of Riverside, California. Its presence along the Reche Canyon stream not only ensures a stable water supply but also enhances recreational opportunities for residents. As climate enthusiasts, monitoring and supporting the safety and maintenance of Sunnymead Ranch can help safeguard the water resources and resilience of the region in the face of changing climate conditions.

Year Completed

1985

Dam Length

780

Dam Height

41

River Or Stream

Reche Canyon

Primary Dam Type

Earth

Surface Area

35

Hydraulic Height

37

Nid Storage

400

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.