Grayson and Walnut Creeks Levee Improvement at CCCSD Treatment Plant

Project Description

Project No.:  7520-6B8348              

Project Description:  The work to be done generally consists of raising the western levees of Grayson Creek and Walnut Creek along the Central Contra Costa Sanitary District (CCCSD) treatment plant. The project limits along Grayson Creek are from the State Route 4 bridge to the Walnut Creek confluence. The project limits along Walnut Creek are from the Grayson Creek confluence to the BNSF Railroad bridge. Work consists of placing and compacting additional 3 to 4 feet of fill on top of the levees, constructing levee flood walls on either side of Imhoff Drive, constructing levee access ramps, and reconstructing a gravel road. Other work includes utility relocation, railroad track removal, maintenance road construction, fence relocation, and vegetation removal.


  • General Location: Martinez, CA
  • Supervisory District: #5       
  • Location:  Location Map (PDF)
  • Contract Cost (Est.): $2,400,000
  • Project Manager: Ron Thai 
  • Bid Due Date: Summer 2022          
  • Funding Source: CCCSD funds, Flood Control Zone 3B funds
  • Working Days: 75
  • Construction Date: Summer 2022

Project Links

  • Notice to Bidders (PDF)
  • Zoom Prebid Meeting Registration Link
  • Planroom
  • PS&E package
    Bidders List
  • Zoom Bid Opening Link
  • Bid Results (PDF)

Outreach Program: The bidder shall make a “Good Faith Effort”, and document this effort, to obtain sub-bid participation by MBE’s, WBE’s, OBE’s, SBE’s and LBE’s in accordance with the project special provisions to be eligible for award.  Bidders that have not attended a pre bid meeting in the last 12 months should attend the County pre bid meeting noted in the Notice to Contractors.  The pre bid meeting will include an overview of the Outreach Program requirements and staff will be available to answer your questions.