Reclamation and Partners Complete Negotiations for the B.F. Sisk Dam Raise and Reservoir Expansion Project in Merced County, Advancing Water Supply Reliability in California’s Central Valley

The joint project creates an additional 130,000 acre-feet of storage space in San Luis Reservoir, the nation’s largest off-stream reservoir, producing additional water supply for two million people, over one million acres of farmland and 135,000 acres of Pacific Flyway wetlands and critical wildlife habitat. Reclamation signed the Record of Decision for the project on Oct. 20, 2023, the first approval of a major water storage project in California since 2011.

Significant provisions of the agreement include cost sharing and space management for the federally-funded and authority-funded shares of the expanded reservoir. A $25 million investment to the project under the Bipartisan Infrastructure Law was announced in October 2022 and an additional $10 million in July 2023. An additional $60 million was authorized for project construction from the Water Infrastructure Improvements for the Nation Act, for a total of $95 million in federal contributions to date in construction costs.