Reclamation, DWR to perform exploratory work near B.F. Sisk Dam
For Release: March 25, 2020
SACRAMENTO, Calif. – The Bureau of Reclamation and the California Department of Water Resources are conducting exploratory work, including clearing, excavation and controlled blasting of rock material in the Basalt Hill area near B.F. Sisk Dam, located between Los Banos and Gilroy, between 6 a.m. to 8 p.m. during April and May.
The exploratory findings on Reclamation lands will help identify size and quality of granular material for the planned construction of a Safety of Dams Modification project.
The joint project between Reclamation and DWR will add stability berms and other physical features to the existing 3.5-mile-long earthen B.F. Sisk Dam to reduce risks associated with a large seismic event.
The public may hear the controlled blasting when it occurs, but it is not expected to impact the public or the environment. Controlled blasting is a commonly used practice at dam construction sites throughout the United States. Public roads will remain open during the controlled blasts; check recreation area updates on San Luis Reservoir and B.F. Sisk Dam websites before visiting in April.
Construction on the multi-year project is planned for summer of 2021. An environmental impact statement/environmental impact report was completed in September 2019, with the Record of Decision/Notice of Determination signed on December 3, 2019.
For project updates, visit https://www.usbr.gov/mp/sod/projects/sisk/.
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The Bureau of Reclamation is a federal agency under the U.S. Department of the Interior and is the nation's largest wholesale water supplier and second largest producer of hydroelectric power. Our facilities also provide substantial flood control, recreation opportunities, and environmental benefits. Visit our website at https://www.usbr.gov and follow us on Twitter @USBR.