Pine Grove Reservoir Report

Last Updated: December 5, 2025

Pine Grove is a historic earth dam located in French Corral, California, along the picturesque Shady Creek.


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Summary

Built in 1911, this public utility serves as a vital water supply source with a storage capacity of 155 acre-feet. The dam stands at a height of 42 feet and spans 610 feet in length, providing essential water resources to the community while also supporting other purposes such as tailings management.

Managed by the California Department of Water Resources and regulated by the Safety of Dams program, Pine Grove has a low hazard potential and is deemed to be in satisfactory condition as of the last assessment in 2017. Despite its age, the dam continues to fulfill its primary purpose of water supply, ensuring a secure and reliable source of water for both agricultural and domestic use. With its rich history and scenic location, Pine Grove stands as a testament to the importance of sustainable water resource management in the face of climate challenges.

Year Completed

1911

Dam Length

610

Dam Height

42

River Or Stream

Shady Creek

Primary Dam Type

Earth

Surface Area

10.5

Hydraulic Height

35.5

Drainage Area

0.5

Nid Storage

155

Hazard Potential

Low

Nid Height

42
       
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.