Lake Suzanne Reservoir Report

Last Updated: December 5, 2025

Lake Suzanne, located in Montague, California, is a private recreational lake managed by the USDA NRCS.


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Summary

Built in 1962, this earth dam structure stands at 18 feet high and spans 1966 feet in length, with a storage capacity of 169 acre-feet. The primary purposes of Lake Suzanne include flood risk reduction, irrigation, and recreation, making it a valuable resource for the local community.

With a surface area of 17 acres and a drainage area of 1.7 square miles, Lake Suzanne is fed by the Tr- Shasta River and has a maximum discharge capacity of 1300 cubic feet per second. Despite its low hazard potential, the condition assessment of the dam is currently not available, indicating a need for further inspection and maintenance. While the emergency action plan status is also unknown, the recreational opportunities and environmental benefits provided by Lake Suzanne make it an important water resource for both residents and visitors in the Siskiyou County area.

Overall, Lake Suzanne serves as a vital recreational and water management asset in California, offering opportunities for outdoor activities and contributing to flood risk reduction and irrigation needs in the region. As a privately owned facility, it remains under the management of the USDA NRCS, ensuring its continued operation and maintenance for the benefit of the community. Further assessments and monitoring may be needed to ensure the long-term safety and effectiveness of this important water resource.

Year Completed

1962

Dam Length

1966

Dam Height

18

River Or Stream

Tr- Shasta River

Primary Dam Type

Earth

Surface Area

17

Hydraulic Height

14

Drainage Area

1.7

Nid Storage

169

Structural Height

18

Hazard Potential

Low

Nid Height

18
       
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.