Stevens Creek Reservoir Report

Last Updated: December 5, 2025

Stevens Creek, located in Cupertino, California, is a vital water resource managed by a public utility for water supply purposes, including irrigation.


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Summary

The dam, completed in 1935, stands at a height of 132 feet and has a maximum storage capacity of 3800 acre-feet. With a surface area of 95 acres and a drainage area of 17.5 square miles, Stevens Creek Reservoir plays a crucial role in providing water to the surrounding area.

This Earth-type dam on Stevens Creek has a hydraulic height of 112.76 feet and is regulated by the California Department of Water Resources for safety. Despite its high hazard potential, the dam is deemed to be in satisfactory condition as per the last assessment in September 2017. Regular inspections are carried out to ensure the structural integrity of the dam, with the last inspection conducted in April 2020. The emergency action plan for the dam was last revised in September 2018, indicating a proactive approach to risk management.

With its important role in water supply and irrigation, Stevens Creek Reservoir is a key asset in the region's water management infrastructure. Climate enthusiasts and water resource experts can appreciate the detailed data available on the dam, highlighting its significance in ensuring water security for the community it serves.

Year Completed

1935

Dam Length

1080

Dam Height

132

River Or Stream

Stevens Creek

Primary Dam Type

Earth

Surface Area

95

Hydraulic Height

112.76

Drainage Area

17.5

Nid Storage

3800

Hazard Potential

High

Nid Height

132
       
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.