TO: Board of Supervisors
FROM: Steven Lederer, Director of Public Works
REPORT BY: James Reese, Associate Engineer
SUBJECT: Approval of Plans and Specifications and Authorization to Advertise for Bids for the "Redwood Road Slide Repair Project, MPM 2.3," RDS 25-27
RECOMMENDATION
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Approve the Plans and Specifications for the "Redwood Road Slide Repair Project, MPM 2.3," RDS 25-27; and authorize advertisement for sealed bids and opening of the bids at a time, date, and location to be published by the Director of Public Works pursuant to Section 20150.8 of the Public Contract Code. (No Fiscal Impact; Discretionary)
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BACKGROUND
During the winter storms of early 2025, intense rainfall and flooding in Redwood Creek caused the failure of a portion of Redwood Road at mile post marker 2.3 (near 3510 Redwood Rd.). Floodwaters undercut the creek bank adjacent to the roadway, causing the westbound lane to fail and slide toward Redwood Creek. The damaged roadway currently presents a safety hazard and restricts the long-term reliability of this important rural transportation route.
The proposed project will repair the failed roadway section and restore full use of Redwood Road. The work generally consists of constructing a 56-foot-long soldier pile wall, flanked by stitch piles, roadway excavation and reconstruction, and installation of guardrail. The Board budgeted some funding ($1.5M) for the project with the February 18, 2025 disaster declaration for multiple locations, though it is likely that additional funding will be needed at award.
County staff obtained the multiple permits needed to construct the project and incorporated the requirements into the plans and specifications. The project plans and specifications are available to view on the https://www.napacounty.gov/1607/Current-Projects website. Upon approval, Public Works staff will advertise the project for bids and return to the Board at a later date to award the construction contract.
Construction of ...
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