NATOMAS LEVEE PROJECT

Natomas Levee Project—U.S. Army Corps of Engineers 

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

January 2021 Status:

Reach A

   i.      The Corps issued its 95% plans for this reach early in August and 100% plans are due January 2021 which will address utility relocations and modifications to Pumping Plants 1A and 1B.

   ii.      SAFCA continues acquiring necessary right of way including 5 homes upstream of I-80 and 7 homes downstream; relocation assistance is being provided to existing residents of the acquired homes.

   iii.      Removal of trees on the levee has commenced.  Contract award is scheduled for September 2021 with cutoff wall and adjacent levee construction starting in spring 2022.

 Reach B

   i.      Clearing and grubbing has been completed including the removal of 3 residential structures.

   ii.      Levee construction has commenced on a limited scale. The volume of levee work is expected to accelerate once identified borrow sites become available.  Construction of the Riverside Canal relocation is progressing

   iii.      Design of the project to close the I-5 window crossing the Sacramento River in Reach B is complete but the bid process has been suspended pending negotiations between Caltrans and DWR/SAFCA on a framework agreement for all NLIP projects impacting Caltrans facilities which is expected the first quarter of 2021.

Reach C

   i.      The Reach C project was completed by SAFCA several years ago and the District’s role is now providing annual maintenance activities in this reach.

Reach D

   i.      The contract for reconstruction of Pumping Plant 4 was delayed and is currently out for bid with award and construction scheduled for spring 2021. 

   ii.      The levee work on Reach D was completed last spring.  The District is working with SAFCA, DWR and the Corps to resolve some minor clean up and repairs.

Reach E

   i.      The revised 65% plans are scheduled to be complete by January.  The Sacramento District is pushing to have the 90% plans by spring for a contract award in July 2021 (construction 2022 and 2023). 

   ii.      SAFCA and State DWR continue working on right of way acquisition and coordination with Sutter County on the Howsley Road bridge replacement project at the northern end of Reach E.

Reach F

   i.      Reach F is along the Natomas East Main Drain Canal from Sankey Road to Elverta Road.  It is being designed concurrently with Reach G.

   ii.      The 35 % plans are scheduled to be complete by late January.  RD 1000 is coordinating with SAFCA, DWR and the Corps on a final design water surface profile as well as channel improvements south of Sankey Road to address potential overtopping during the 200-year flood.

   iii.      Current plans propose levee widening and potentially limited cutoff walls.  Current schedule is for Contract Award in spring 2022.

Reach G

   i.      Reach G is along the Natomas East Main Drain Canal from Elverta Road to south of Elkhorn Blvd.   It is being designed concurrently with Reach F.

   ii.      The 35 % plans are scheduled to be complete by late January.  RD 1000 is coordinating with SAFCA, DWR and the Corps on a final design water surface profile as well as channel improvements south of Sankey Road to address potential overtopping during the 200-year flood.

   iii.      Current plans propose levee widening and potentially limited cutoff walls.  Current schedule is for Contract Award in spring 2022.  

Reach H

   i.      Levee cutoff walls, slope flattening and levee restoration work has been completed for 2020.   Patrol / maintenance road grading, fence relocations, and restoration of East Levee Road will recommence in spring 2021.

   ii.      The permanent reconnection of the new discharge pipes placed during levee construction to the existing pipes at Pumping Plant 8 was completed except for two pipes that were found to have existing (pre-project) damage.  A temporary connection for these two pipes was made for this flood season and the District is evaluating a more permanent fix proposed for 2021.

Reach I

   i.      Construction of the cutoff wall is complete. 

   ii.      The separate contract (Reach I Contract 2) to construct a patrol / maintenance road and perform levee slope flattening has been delayed due to right of way acquisition issues with construction scheduled for 2023 or later.