Loading...

Unofficial Notice of Invitation to Bid (NIB)

San Mateo County is seeking bids from qualified and interested contractors for the following project titled, LERIDA COURT AND GABARDA WAY RETAINING WALLS IMPROVEMENT PROJECT, identified under Solicitation ID: E5022. Work is to be performed near 555 County Center, Redwood City, CA 94063, USA in San Mateo County.

Create a Free account to view ALL details and documentsNo credit card required

General Project Description

This project in the Ladera Area of San Mateo County involves the improvement of retaining walls along Lerida Court and Gabarda Way, totaling approximately 320 feet in length, including appurtenant work. The scope encompasses demolition of existing concrete ditches, asphalt concrete dikes, and pavements; site preparation including building pad preparation and tree removal; earthwork operations such as earth fill embankment. Key structural enhancements include installation of Cast-In-Drilled-Hole (CIDH) concrete piles connected by reinforced concrete beams, ground anchors, and structural steel walers. Drainage system improvements entail removal and replacement of existing storm drainage pipes and drop inlets, and installation of new plastic pipe downdrains and geocomposite drains. Other work involves surface reconstruction of asphalt concrete dikes, pavements, and concrete ditches; installation of Class III rock slope protection; application of structural and sculpted shotcrete; and installation of temporary and permanent chain link fences. Project execution will also include mobilization, maintaining traffic, water pollution control, construction waste management, temporary erosion control measures like fiber rolls and hydroseeding, and construction staking and layout.

General Bid Items

  • Quantity: 1  Unit: LS  Work Item: Mobilization (10%)
  • Quantity: 1  Unit: LS  Work Item: Maintaining Traffic
  • Quantity: 1  Unit: LS  Work Item: Water Pollution Control
  • Quantity: 1  Unit: LS  Work Item: Construction Waste Management
  • Quantity: 2  Unit: EA  Work Item: Remove Inlet
  • Quantity: 125  Unit: CY  Work Item: Remove Concrete Ditch
  • Quantity: 1  Unit: LS  Work Item: Clearing and Grubbing
  • Quantity: 2  Unit: EA  Work Item: Remove Tree
  • Quantity: 760  Unit: CY  Work Item: Earth Fill Embankment
  • Quantity: 1870  Unit: LF  Work Item: Fiber Rolls
  • Quantity: 1  Unit: ACRE  Work Item: Hydroseed
  • Quantity: 1  Unit: CY  Work Item: Class 2 Aggregate Base
  • Quantity: 22  Unit: LF  Work Item: Remove Asphalt Concrete Dike
  • Quantity: 2  Unit: CY  Work Item: Remove Base and Surfacing
  • Quantity: 4  Unit: TON  Work Item: Hot Mix Asphalt
  • Quantity: 45  Unit: EA  Work Item: Ground Anchors
  • Quantity: 1325  Unit: LF  Work Item: 24” CIDH Concrete Piles
  • Quantity: 100  Unit: CY  Work Item: Concrete (Swale)
  • Quantity: 40  Unit: CY  Work Item: Concrete (Wall Gutter)
  • Quantity: 61  Unit: CY  Work Item: Structural Concrete (Waler)
  • Quantity: 7  Unit: CY  Work Item: Structural Concrete (Drainage Inlet)
  • Quantity: 200  Unit: CY  Work Item: Structural Shotcrete
  • Quantity: 4050  Unit: SQFT  Work Item: Sculpted Shotcrete
  • Quantity: 16010  Unit: LB  Work Item: Structural Steel (Waler), Specifications: MC18x58
  • Quantity: 35  Unit: LF  Work Item: 12” Plastic Pipe Downdrain
  • Quantity: 3170  Unit: SQFT  Work Item: Geocomposite Drain
  • Quantity: 5  Unit: CY  Work Item: Rock Slope Protection (Class III)
  • Quantity: 700  Unit: LF  Work Item: Temporary Fence (Type CL-6)
  • Quantity: 300  Unit: LF  Work Item: Chain Link Fence (Type CL-4)
  • Quantity: 1  Unit: LS  Work Item: Construction Staking and Layout

NAICS Classification

NAICS 237310 – Highway, Street, and Bridge Construction (Covers general civil engineering work involving earthwork, pavement, and drainage improvements), NAICS 237990 – Other Heavy and Civil Engineering Construction (Includes specialized heavy construction such as retaining walls, ground anchors, and pile foundations), NAICS 238110 – Poured Concrete Foundation and Structure Contractors (For concrete piles, structural concrete elements like walers, and shotcrete applications), NAICS 238910 – Site Preparation Contractors (For clearing, grubbing, demolition, excavation, earth fill, and erosion control activities), NAIC S 238990 – All Other Specialty Trade Contractors (For temporary fences, construction staking, and other specialized work items)

Records and Due Date

This bid opportunity was entered into BidAmerica on February 27, 2026, and was last updated on February 27, 2026. All bids and/or proposals are due on March 19, 2026.

Contractors may log in or create a free BidAmerica account to view full project documents, plans, specifications, addenda, submission requirements, and more project details issued by San Mateo County.

Legal Disclaimer

All bidders are responsible for reviewing and verifying all official bid documentation directly from the issuing agency. BidAmerica aggregates public bid information for advertisement purposes for contractors and government agencies convenience. This Notice of Invitation to Bid is for reference purposes only and is not an official or complete representation of any documents issued by San Mateo County. BidAmerica does not guarantee the accuracy, completeness, or timeliness of any information displayed and shall not be held liable for any errors, omissions, misinterpretations, or damages resulting from reliance on this summary. Contractors must obtain all official information—including plans, specifications, addenda, deadlines, submission requirements, qualifications, and bidding conditions—directly from San Mateo County prior to bidding.