Uvas Reservoir Report

Last Updated: December 5, 2025

Uvas Reservoir, nestled in the picturesque Santa Clara County in California, is a vital water resource managed by a public utility.


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Summary

Completed in 1957, this Earth-type dam on Uvas Creek stands at a height of 118 feet and has a storage capacity of 10,000 acre-feet. Serving primarily as a water supply source for irrigation and domestic use, this reservoir covers an area of 280 acres and has a drainage area of 32 square miles.

With a high hazard potential but a satisfactory condition assessment, Uvas Reservoir is regulated by the Department of Water Resources and monitored for safety by the Safety of Dams agency. Located in Gilroy, the reservoir plays a crucial role in supporting the water needs of the surrounding community. Despite its age, regular inspections ensure that the dam remains structurally sound and capable of withstanding potential risks, showcasing the commitment to maintaining this essential water infrastructure. Enthusiasts of water resources and climate will find Uvas Reservoir to be a fascinating example of responsible water management in the face of environmental challenges.

Year Completed

1957

Dam Length

1100

Dam Height

118

River Or Stream

Uvas Creek

Primary Dam Type

Earth

Surface Area

280

Hydraulic Height

105.5

Drainage Area

32

Nid Storage

10000

Hazard Potential

High

Nid Height

118
       
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.