Natomas Levee Project
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
July 2024 Status:
Reach A
i. The Contract was awarded in September 2021 to Ahtna-Great Lakes (joint venture) for the base contract levee work. The second construction has commenced.
ii. Cutoff Wall and utility relocaitons in progress.
iii. SAFCA/State continue coordinating with the Corps on SMUD, AT&T and PGE relocations which are underway. The team is also working with the City of Sacramento on waterline and service connections along Garden Highway.
Reach B
i. Construction continued on Reach B including relocation of the Riverside Canal and replacement of other Natomas Water Company facilities. This project is 99% complete, the remaining tasks are related to as-built drawings.
Reach D
i. The reconstruction of Pumping Plant 4, discharge pipes and outfall structure is substantially complete. Electrical protection equipment delivery is scheduled for 2024. A meeting has been scheduled on 8/5/24 to discuss the capacitor bank design. The capacitor bank is required to meet PG&E's voltage drop specifications to secure permanent power connection.
ii. Contract modifications have been issued for the permanent power gear installation, which should be complete before next flood season.
iii. The Corps is working on the package to turn the previously completed levee improvements in Reach D over to the non-federal sponsors (and RD 1000) though the District has effectively taken over the O&M of the levee.
Reach E
i. PG&E relocations are complete, AT&T service pole relocations are in progress. Levee grading work, SB cutoff wal, working platform and culvert underdrain tie-ins are in included in this project.
ii. SAFCA has acquired all the right of way for construction and utility relocations and has physical possession of the property. This includes the
Reach F
i. Final design documents completed by USACE.
ii. Critical issues include right of way acquisition (some which require relocations); relocation of existing WAPA tower (lead time for relocation more than a year); utility relocations and borrow source.
iii. Levee construction award is scheduled for 2024 with construction in 2025 and 2026. Ongoing coordination with easements, O&M features and Pumping Plant #6 work.
Reach G
i. See notes above for Reach F as Reaches F and G are combined into a single design and construction contract.
Reach H
i. Construction at Reach H is project is 99% complete, the remaining tasks are related to as-built drawings.
Reach I
i. Construction of the cutoff wall has been completed and project finalization and turnover to SAFCA and the District is in progress. A final construction report has been submitted for SAFCA and the District to review.
ii. Design for the Reach I Contract 2 to construct a patrol / maintenance road and perform levee slope flattening has been completed. SAFCA is working on real estate acquisition and coordination with utilities for relocation. All tree removal has been completed. Letter of Acceptance sent to SAFCA. O&M manual was provided by the USACE
Hwy 99/NCC Cutoff Wall
i. Construction expected June-October 2025, however 90% of the geotechnical drilling is complete.
Other Projects
Plant 5 replacement—The Corps has awarded the design contract to the Stantec/Kleinfelder team. The new pumping plant will be located approximately 400 feet east from the current location. The Corps is working with the State, SAFCA and RD 1000 to close out comments from the 95% plans. The current schedule is for construction in 2025.
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