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Unofficial Notice of Invitation to Bid (NIB)
Contra Costa County is seeking bids from qualified and interested contractors for the following project titled, Morgan Territory Road at Post Mile 5.0 Bridge Replacement over Marsh Creek, identified under Solicitation ID: 0662-6U4160. Work is to be performed near 1220 Morello Ave, Martinez, CA 94553, USA in Contra Costa County.
General Project Description
The project generally involves replacing an existing timber bridge with a reinforced concrete bridge, including concrete pile foundations and two soldier pile retaining walls. The scope of work also encompasses constructing a temporary stream diversion system, building a detour road, installing rock slope protection and drainage systems, erecting guard railing, and performing necessary grading and paving. The construction is anticipated to be completed over one season.
General Bid Items
- Quantity: - Unit: - Work Item: Bridge Replacement (Replacing timber bridge with reinforced concrete bridge including concrete pile foundations and two soldier pile retaining walls)
- Quantity: - Unit: - Work Item: Temporary Stream Diversion System Construction
- Quantity: - Unit: - Work Item: Detour Road Construction
- Quantity: - Unit: - Work Item: Rock Slope Protection Installation
- Quantity: - Unit: - Work Item: Drainage Systems Installation
- Quantity: - Unit: - Work Item: Guard Railing Installation
- Quantity: - Unit: - Work Item: Grading
- Quantity: - Unit: - Work Item: Paving
NAICS Classification
NAICS 237310 – Highway, Street, and Bridge Construction (Replacing a bridge, constructing a detour road, grading, paving, and guard railing installation.), NAICS 237990 – Other Heavy and Civil Engineering Construction (Constructing concrete pile foundations, soldier pile retaining walls, temporary stream diversion system, rock slope protection, and drainage systems.)
Records and Due Date
This bid opportunity was entered into BidAmerica on February 18, 2026, and was last updated on February 18, 2026. All bids and/or proposals are due on March 17, 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 Contra Costa 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 Contra Costa County prior to bidding.