Unofficial Notice of Invitation to Bid (NIB)

Transbay Joint Powers Authority is seeking bids from qualified and interested contractors for the following project titled, Progressive Design-Build Civil and Tunnel Construction (40-CT), identified under Solicitation ID: 25-10. Work is to be performed near 425 Mission St, San Francisco, CA 94105, USA in San Francisco County.

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General Project Description

The Transbay Joint Powers Authority (TJPA) has issued a Request for Proposals (RFP) to shortlisted firms for a Progressive Design-Build Civil and Tunnel Construction project for the Transbay Portal. This project entails comprehensive design and construction services for civil and tunnel infrastructure, proceeding from an initial Request for Qualifications (RFQ) process.

General Bid Items

Quantity: - Unit: - Work Item: Progressive Design-Build Services for Civil Infrastructure related to the Transbay Portal Project.
Quantity: - Unit: - Work Item: Progressive Design-Build Services for Tunnel Construction related to the Transbay Portal Project.
Quantity: - Unit: - Work Item: Comprehensive Project Management and Coordination for the Design-Build Civil and Tunnel Construction.

NAICS Classification

NAICS 237990 – Other Heavy and Civil Engineering Construction (Covers general heavy civil engineering projects, including tunneling and associated civil works for a large-scale portal infrastructure.), NAICS 541330 – Engineering Services (Directly relevant due to the "Progressive Design-Build" nature, encompassing all necessary engineering design phases.), NAICS 237310 – Highway, Street, and Bridge Construction (Frequently includes major tunnel construction projects that are integral to transportation infrastructure and large-scale public works.)

Records and Due Date

This bid opportunity was entered into BidAmerica on December 23, 2025, and was last updated on December 22, 2025. All bids and/or proposals are due on June 4, 2026.

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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 Transbay Joint Powers Authority. 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 Transbay Joint Powers Authority prior to bidding.