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Sacramento Levee Upgrades Overview


American River Common Features (ARCF) 2016 Draft SEIS-SEIR - December 2023
*THE PUBLIC COMMENT PERIOD HAS BEEN EXTENDED. Public comments will now be accepted until February 23, 2024 and can be submitted to and
Draft SEIS-SEIR Report
Draft SEIS-SEIR Appendices
Figure 3.5.2-11, 3.5.2-12
LAR C3B trees upstream 20240216
LAR C3B trees downstream 20240216

American River Contract 3A Final SEA/SEIR - November 2022
Final SEA Report
Final SEIR Report
Final SEA-SEIR Appendices
Final SEA Finding of No Significant Impact (FONSI)
Final SEIR Notice of Determination 

American River Contract 3A Draft SEA/SEIR - April 2022/July 2022 (Recirculated)
Draft SEA Notice of Availability (Recirculated)
Draft SEA (Recirculated)
Draft SEA Appendix (Recirculated)

Notice of Availability
Draft SEA/SEIR Report
Frequently Asked Questions

For previous project documents, 
visit our Archive

Contact Information

For more information on
Sacramento Levee Upgrades,
please contact us at the following:



Mailing Address:
U.S. Army Corps of Engineers,
Sacramento District
1325 J Street, Room 1513
Sacramento, CA 95814

Levee upgrades to build on recent flood risk management efforts

The Sacramento Metropolitan area is one of the most at risk areas for flooding in the United States due to its location at the confluence and within the floodplain of two major rivers. Significant levee improvements, primarily through the construction of 22 miles of seepage cutoff walls, were completed on the American River in 2016 as part of the Water Resources Development Act (WRDA) 96/99 project. Now, this project will add up to 11 miles of bank protection for Lower American River levees. But this portion includes more than just the American River. Sections of the Natomas East Main Drainage Canal (NEMDC), Arcade Creek, and Magpie Creek would be improved to address identified seepage, stability, erosion, and height concerns.

The project is funded by federal, state, and local governments through a cost-share agreement. The federal government, via the U.S. Army Corps of Engineers, is the lead in constructing the project and the non-federal sponsors include the state’s Central Valley Flood Protection Board and Department of Water Resources (DWR) and local government the Sacramento Area Flood Control Agency (SAFCA).

Special Event: Community Conversation regarding American River Common Features

The Office of Congressman Ami Bera and team members from the U.S. Army Corps of Engineers Sacramento District held a virtual community conversation regarding the American River Common Features Project erosion control efforts on April 8, 2024.

Watch and listen to community conversation 

View the presentation slide deck

Status of the American River Common Features (ARCF) 2016 Flood Risk Management Project, Draft Supplemental Environmental Impact Statement/Subsequent Environmental Impact Report XIV (SEIS/SEIR)

The ARCF 2016 Flood Risk Management Project SEIS/SEIR XIV was prepared to address design refinements made to the 2016 ARCF General Reevaluation Report (GRR) Final EIS/EIR. Refinements include changes to designs associated with the Magpie Creek Project, American River Erosion Contract 3B, 4A, and 4B, Sacramento River Erosion Contract 3, American River Mitigation Site, Sacramento River Mitigation Site, and installation of a Piezometer Network.

USACE and the non-federal Partners received public comments from December 22, 2023, until February 23, 2024, during the extended comment period of 63 days. We are no longer accepting comments and have shifted focus to finalize the comprehensive comment log to ensure every comment is captured and adequately responded to by a subject matter expert, including environmental resources, engineering, project management staff. For perspective, we have logged nearly 900 comment letters. The Public Involvement appendix of the Final SEIS/SEIR will include all public and agency comments and responses, and the resulting text changes made to the SEIS/SEIR.

Announcements for future public outreach associated with the Project Components in this SEIS/SEIR will be posted on

Any further questions regarding the ARCF 2016 Project can be directed to USACE. Public Affairs Office:

The public may still view the Draft SEIS/SEIR at the links below, and the recorded public meetings held on January 10th, and 16th, 2024 under the Public Engagements tab.

The Draft SEIS/SEIR is available here: – Draft SEIS-SEIR Report
The Draft SEIS/SEIR Appendices are available here: – 
Draft SEIS-SEIR Appendices

Note: A public commenter brought to our attention that Section 3.5.2 American River Erosion Contracts 3B North, 3B South, and 4B, in the Draft SEIS/SEIR omitted Figures 3.5.2-11 and 3.5.2-12 (page 3-42). These diagrams have been available to the public in the Presentation Slides under Public Engagements on Slide Number 11. You may also view the link below. These Figures will be added to the Final SEIS/SEIR.
Figure 3.5.2-11, 3.5.2-12
LAR C3B trees upstream 20240216
LAR C3B trees downstream 20240216

Answers to Frequently Asked Questions can be found hereFAQ

USACE published the Notice of Intent (NOI) to prepare the ARCF SEIS/SEIR in the Federal Register (Vol. 87, No. 194) on October 7, 2022, with an update posted in the Federal Register (Vol. 87, No. 199) on October 17, 2022. 

·         Original NOI can be found HERE.  

·         Corrected NOI which extended the scoping period can be found HERE.  

·         The public scoping period was extended to December 31, 2022.

Public scoping for this SEIS/SEIR was initiated in November 2022. Virtual public scoping meetings were held November 2, and November 30, 2022, to discuss the development of the Draft SEIS/SEIR. Scoping resulted in 69 categorized comments, one-third of which were related to habitat mitigation concerns. Appendix A, Scoping Report, in the Draft SEIS/SEIR contains scoping comments and the corresponding responses. The presentation slides and meeting recording can be found here:

Current Project Activities for American River Levees


Frequently Asked Questions

Public Engagements for American River Levees


Lower American River Project Map

Projects included in the SEIS_SEIR

Mitigation for Lower American River Projects

Offsite Mitigation - Lower American River Projects