Boxsprings Reservoir Report

Last Updated: December 5, 2025

Located in Riverside, California, Boxsprings is a crucial flood risk reduction dam built in 1960 to protect the surrounding area from potential flooding.


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Summary

Managed by the local government, this earth dam stands at a height of 49 feet and has a hydraulic height of 42 feet, with a storage capacity of 405 acre-feet. The dam spans 550 feet in length and covers a surface area of 29 acres, serving as a vital structure in safeguarding the community against high hazard potential.

Boxsprings Dam is regulated and inspected by the California Department of Water Resources (DWR) to ensure its structural integrity and overall condition. With a satisfactory assessment as of September 2017, the dam is tasked with mitigating flood risks along Box Springs Creek. The high hazard potential of the dam underscores its importance in protecting the local area, making it a key asset in water resource management and climate resilience efforts in Riverside.

As a critical infrastructure for flood risk reduction, Boxsprings Dam plays a crucial role in safeguarding Riverside from potential inundation events. With its satisfactory condition assessment and regular inspections, the dam stands as a reliable structure designed to manage high hazard potential and ensure the safety of the surrounding community. Its strategic location and purpose-driven design make Boxsprings a significant asset in the region's water resource management and climate adaptation strategies.

Year Completed

1960

Dam Length

550

Dam Height

49

River Or Stream

Box Springs Cr

Primary Dam Type

Earth

Surface Area

29

Hydraulic Height

42

Drainage Area

4

Nid Storage

405

Hazard Potential

High

Nid Height

49
       
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.