Spring Valley Ranch Reservoir Report

Last Updated: December 5, 2025

Spring Valley Ranch is a privately owned dam located in Colfax, California, with a primary purpose of flood risk reduction.


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Summary

Constructed in 1958, this earth dam stands at 39 feet high and has a hydraulic height of 35 feet, providing a storage capacity of 60 acre-feet. The dam is regulated by the California Department of Water Resources (DWR) and undergoes regular inspections to ensure its structural integrity.

Situated on Tr Campbell Creek, the Spring Valley Ranch dam plays a crucial role in mitigating flood risks in the area while also supporting irrigation and water supply needs. The dam has a high hazard potential but has been assessed as satisfactory in condition, with the most recent inspection in January 2021. With its strategic location and significant storage capacity, this dam serves as a key infrastructure for water resource management in Placer County.

Managed by the Natural Resources Conservation Service, Spring Valley Ranch dam continues to play a vital role in safeguarding the surrounding communities from potential flooding events. With its satisfactory condition assessment and regular inspections, the dam stands as a testament to effective water resource management and climate resilience efforts in the region.

Year Completed

1958

Dam Length

350

Dam Height

39

River Or Stream

Tr Campbell Cr

Primary Dam Type

Earth

Surface Area

6

Hydraulic Height

35

Nid Storage

60

Hazard Potential

High

Nid Height

39
       
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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.