Red Mountain Reservoir Reservoir Report

Last Updated: December 5, 2025

Red Mountain Reservoir, located in Fallbrook, California, serves as a vital water supply source for the region, primarily for irrigation purposes.


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Summary

This earth dam, completed in 1985, stands at a height of 120 feet and has a storage capacity of 1,350 acre-feet. The reservoir is situated on Reche Creek and covers a surface area of 23 acres, with a drainage area of 0.25 square miles.

Managed by a public utility, the Red Mountain Reservoir is regulated by the California Department of Water Resources (DWR) under the Safety of Dams program. The dam has been classified with a high hazard potential, but its condition assessment in 2017 deemed it to be satisfactory. Regular inspections take place, with the most recent one conducted in February 2021, ensuring the safety and reliability of the structure.

With its strategic location and crucial role in water supply management, Red Mountain Reservoir stands as a key asset in the region's water infrastructure. Climate enthusiasts and water resource stakeholders can appreciate the significance of this reservoir in sustaining agricultural activities and safeguarding water resources in San Diego County.

Year Completed

1985

Dam Length

1500

Dam Height

120

River Or Stream

Reche Creek

Primary Dam Type

Earth

Surface Area

23

Hydraulic Height

112

Drainage Area

0.25

Nid Storage

1350

Hazard Potential

High

Nid Height

120
       
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.