Halsey Forebay No. 2 Reservoir Report

Last Updated: December 5, 2025

Halsey Forebay No.


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Summary

2 is a privately owned earth dam in Auburn, California, with a primary purpose of hydroelectric power generation. Constructed in 1913, this dam stands at a height of 55 feet and has a hydraulic height of 36.5 feet. With a storage capacity of 244 acre-feet, it serves as a critical water resource for the area, contributing to the overall hydroelectric power production in the region.

Managed by the Federal Energy Regulatory Commission, Halsey Forebay No. 2 is subject to state regulation and inspection to ensure its safety and compliance with dam standards. Despite being deemed as having a significant hazard potential, the condition assessment for this dam is currently unavailable. With a risk assessment rating of 'High (2)', it is crucial to have emergency action plans in place to mitigate potential risks and ensure the safety of the surrounding community in case of any unforeseen events.

Located on Dry Creek and part of the San Francisco District, Halsey Forebay No. 2 plays a vital role in water resource management and climate resilience efforts in the area. Its historic significance, combined with its hydroelectric power generation capabilities, highlights the importance of maintaining and regulating this dam to ensure the sustainable use of water resources and the continued protection of the environment.

Year Completed

1913

Dam Length

1167

Dam Height

55

River Or Stream

Dry Creek

Primary Dam Type

Earth

Surface Area

18

Hydraulic Height

36.5

Nid Storage

244

Structural Height

55

Hazard Potential

Significant

Nid Height

55
       
Seasonal Comparison

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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.