West Sacramento Levee Improvement Project

West Sacramento sits at the confluence of the American and Sacramento Rivers, adjacent to the Yolo Bypass and directly within the flood plain of the Sacramento River. After record flooding in 1986 and 1997, it became clear that the city and the region needed to modernize its levee system to reduce the risk of flooding. 

By 2002, an initial round of levee improvement construction in West Sacramento was largely complete, raising more than a mile of the Sacramento Bypass south levee by as much as 5 feet, and raising 4.5 miles of the Yolo Bypass levee by as much as 5.5 feet. In 2011, the Corps also began work on a setback levee along the Sacramento River south levee near South River Road as part of the Sacramento River Bank Protection Project.

The West Sacramento Area Flood Control Agency continues to move forward with levee improvements throughout the city, as well. WSAFCA completed improvements to the Sacramento Bypass levee and the Sacramento River north levee in 2011, near the I Street Bridge on the Sacramento River north levee in 2008, and is currently finalizing plans to build 6 miles of setback levee along the Sacramento River south levee.

After years of work, West Sacramento has made great strides to reduce the flood risk, but additional work remains necessary.

In July 2014, the Corps released a draft general re-evaluation report, which outlined the tentatively selected plan for more improvements for the full levee system surrounding the City of West Sacramento. Once the report and plan is finalized and approved by Corps headquarters, it becomes eligible for Congressional authorization. If authorized and funded by Congress, the project would be ready to move into design and construction phases, which would be cost-shared between the Corps, state of California and WSAFCA.

Virtual Public Meeting on November 17, 2021

Wednesday, November 17, 2021

This virtual public meeting was held to discuss the WSAFCA Yolo Bypass East Levee Reach Project. 

Presentation Slides (PDF)


Previous Documents

Draft Chief's Report - Jan. 2016
To All Interested Parties Letter
Draft Report

Final General Reevaluation Report (GRR) - Jan. 2016
Main Report

Final Environmental Impact Statement/Environmental Impact Review (EIS/EIR) - Jan. 2016
Main Report

Draft General Reevaluation Report (GRR) - July 2014
Main Report
Appendix A - Hydrology
Appendix B - Hydraulics
Appendix C - Civil Design
Appendix D - Real Estate
Appendix E - Geotechnical
Appendix F - Cost Engineering
Appendix G - Economics


Draft Environmental Impact Statement/Environmental Impact Review (EIS/EIR) - July 2014
Main Report
Appendix A
Appendix B
Appendix C
Appendix D
Appendix E
Appendix F
Appendix G
Appendix H

Project Area

West Sac Study Area Map

The West Sacramento project area approximately corresponds with the city limit for the City of West Sacramento and is almost completely bound by floodways and levees with the Yolo Bypass to the west, the Sacramento Bypass to the north, the Sacramento River to the east and the South Cross levee along its southern boundary. The area encompasses two basins, broken up into north and south sections separated by the Sacramento Deep Water Ship Channel that bisects the city; and has nearly 13,000 acres of mixed-use land, an estimated population of 48,000 residents, and vital infrastructure including the regional United States Postal Service mail processing center, the regional California State Department of Water Resources flood fight facility, the California Highway Patrol Academy, and the Port of West Sacramento

Contact Information

For more information on the West Sacramento project, please contact us at the following:



Mailing Address:
U.S. Army Corps of Engineers,
Sacramento District

West Sacramento GRR
1325 J Street, Room 1513
Sacramento, CA 95814