B. F. Sisk Dike Reservoir Report

Last Updated: December 5, 2025

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Summary

F. Sisk Dike, also known as the San Luis Dike, is a federal-owned structure located in Los Banos, California. Completed in 1967, this earth dam serves multiple purposes including hydroelectric power generation, irrigation, and recreation. With a height of 30 feet and a length of 300 feet, the dam plays a crucial role in managing water resources in the area.

Managed by the Bureau of Reclamation, B. F. Sisk Dike has a high hazard potential and is classified as a high-risk structure. Despite its importance, the condition assessment of the dam is currently not available. The dam has a storage capacity of over 2 million acre-feet and is associated with the San Luis Creek, providing vital water resources for the region.

The B. F. Sisk Dike is a key component of the water infrastructure in Merced County, California, providing essential water storage and management capabilities. With its primary purpose being hydroelectric power generation, the dam is instrumental in meeting the water needs of the area while also serving recreational and irrigation purposes. As a federally-owned structure, the B. F. Sisk Dike plays a crucial role in water resource management and climate resilience efforts in the region.

Year Completed

1967

Dam Length

300

Dam Height

30

River Or Stream

SAN LUIS CREEK

Primary Dam Type

Earth

Surface Area

12770

Hydraulic Height

17

Nid Storage

2063510

Structural Height

30

Hazard Potential

High

Foundations

Rock

Nid Height

30
       
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.