Natomas Levee Project

Natomas Levee project

Natomas Levee Project—U.S. Army Corps of Engineers (Update March 2019)

Goal:  Complete levee improvements started by SAFCA/State to provide Natomas Basin at least 200-year flood protection

Project Status:  Project is fully authorized by Congress (2014 Water Resources and Reform Development Act).  Appropriations are made on an annual basis

Cost Sharing Partners:       SAFCA (local) and Central Valley Flood Protection Board (State)

Operation and Maintenance Responsibility:  Reclamation District No. 1000

Construction Status:         See Construction Phasing Map

Reach I (American River--Gateway Oaks to Northgate):   Phase 1 contract was awarded in October 2018.  Work under I-5 began in mid-December 2018 but construction was delayed by weather and flooding of the construction staging area in Discovery Park.  Construction recently commenced under I-5 the week of March 10.  Work will require partial lane closures under I-5 starting in April 2019.  Cutoff wall construction along Garden Highway is expected to commence in April with significant traffic impacts including the full closure of Garden Highway between Truxel and Northgate.  For the latest information see contact information below provided by the U.S. Army Corps of Engineers:

We’ll provide more information regarding the dates and duration of the closure in the coming weeks. You can stay up-to-date by following us on Facebook and Twitter or by signing up for our mailing list by contacting Tyler Stalker at (redacted) or 916-557-5100. For more information on the project, please see our project web page at


Reach H (NEMDC/Steelhead Creek from American River to Dry Creek):  The contract was awarded in January 2019.  Anticipate construction commencing in April 2019 and completion in 2020.  Cutoff wall in the levee and landside improvements; will require temporarily degrading (lowering) existing levee for construction between the Arden Garden Connector to north of Main Avenue.

Reach D (Natomas Cross Canal—northern boundary of Natomas):  Contract awarded May 2018. Construction commenced in August but has been shut down due to weather for the duration of the flood season.  Work is expected to commence in April 2019 with completion of the relocation of the Vestal Drain and the removal/replacement of the RD 1000l Pumping Plant No. 4.  In addition, the remaining infrastructure for the Natomas Water Company’s Bennet and Northern water intake facilities will be removed and the levee raised to the final design elevation consistent with the rest of the levee. 

Reaches A and B—Preliminary design has commenced on Reaches A and B with Reach B as the anticipated first project--construction anticipated to start in 2020 predominantly using an adjacent levee with seepage berms.  Property owners affected by the Construction have been contacted by SAFCA representatives to discuss the project and any necessary right of way acquisition required for the improvements.  Reach A is still in preliminary design.  Initial outreach to affected properties is anticipated in late 2019


Reaches E, F and G—Improvements are currently in various phases of design to identify necessary improvements, right of way needs, and identify utility relocations necessary.  See Construction Phasing Map for anticipated construction schedule.  Information on construction details and schedule will be provided when available