B. F. Sisk Reservoir Report

Last Updated: December 5, 2025

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Summary

F. Sisk, located in Merced, California, is a federal-owned Earth dam on the San Luis Creek, completed in 1967 for hydroelectric purposes. The dam stands at an impressive 305 feet in height, with a structural height of 382 feet and a length of 18,600 feet. It boasts a storage capacity of over 2 million acre-feet, making it a crucial resource for irrigation, recreation, and water supply in the region.

Managed by the Bureau of Reclamation, B. F. Sisk has a high hazard potential and a moderate risk assessment, with regular inspections conducted by the federal agency. While the condition assessment is not currently available, emergency action plans have been prepared and updated to ensure the safety of the surrounding areas in the event of any unforeseen emergencies. With its strategic location and vital role in water resource management, B. F. Sisk remains a key asset for the community and a symbol of sustainable development in California.

As a significant infrastructure project in the state, B. F. Sisk not only provides essential hydroelectric power but also contributes to the overall water security and recreational activities in the region. Its construction and operation are overseen by the Bureau of Reclamation, ensuring efficient management and regulatory compliance. With its impressive size and capacity, B. F. Sisk stands as a testament to the importance of water resource management and climate resilience in the face of changing environmental conditions and growing demand for sustainable water solutions.

Year Completed

1967

Dam Length

18600

Dam Height

305

River Or Stream

SAN LUIS CREEK

Primary Dam Type

Earth

Surface Area

13000

Hydraulic Height

305

Drainage Area

83

Nid Storage

2118380

Structural Height

382

Hazard Potential

High

Nid Height

382
       
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.