Clifton Court Forebay Reservoir Report

Last Updated: December 5, 2025

Clifton Court Forebay is a vital water resource structure located in Contra Costa, California, serving multiple important purposes such as hydroelectric power generation, irrigation, and water supply.


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Summary

Completed in 1970, this earth dam stands at a height of 34 feet and has a storage capacity of 29,000 acre-feet, with a surface area of 2500 acres. It is state-owned and regulated by the California Department of Water Resources, ensuring proper inspection, permitting, and enforcement to maintain its fair condition and low hazard potential.

Situated on the Tr Old River, Clifton Court Forebay plays a crucial role in water management and energy production in the region. The dam's location within the San Francisco District highlights its significance in controlling water flow and storage for various purposes. With a designer name unspecified, the structure operates under state jurisdiction and receives regular inspections, emphasizing its importance in ensuring water safety and resource management for the local community.

As a key component in the water infrastructure of California, Clifton Court Forebay stands as a testament to the state's commitment to sustainable water resource management. With its multiple functions and regulated operation, the dam serves as a cornerstone in ensuring water supply reliability, energy production, and irrigation needs in the region. Its strategic location and efficient design contribute to the overall resilience and stability of the water supply system, making it a critical asset for water resource and climate enthusiasts to appreciate and support.

Year Completed

1970

Dam Length

39000

Dam Height

34

River Or Stream

Tr Old River

Primary Dam Type

Earth

Surface Area

2500

Hydraulic Height

26

Nid Storage

29000

Hazard Potential

Low

Nid Height

34
       
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.