Unofficial Notice of Invitation to Bid (NIB)

Contra Costa County is seeking bids from qualified and interested contractors for the following project titled, Wildcat Fish Passage Implementation Project, identified under Solicitation ID: 7505- 6F8101. Work is to be performed near 255 Glacier Dr, Martinez, CA 94553, USA in Contra Costa County.

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General Project Description

This project involves replacing the existing Wildcat Creek fish ladder with a new concrete step pool system and constructing a roughened ramp channel with grouted boulders and deflection bollards. The scope also includes desilting and expanding the sediment basin, constructing RSP training berms with plant tubes, building access platforms, regrading the basin area, reconstructing a gravel trail, and modifying the upstream channel by replacing a grouted rock section with gravel and fines in the North Richmond area. Additionally, the work encompasses shoring, stream diversion, and dewatering operations.

General Bid Items

Quantity: - Unit: UNIT Work Item: Removal of existing Wildcat Creek fish ladder.
Quantity: - Unit: UNIT Work Item: Installation of concrete step pool system.
Quantity: - Unit: UNIT Work Item: Construction of roughened ramp channel.
Quantity: - Unit: UNIT Work Item: Installation of grouted boulders and deflection bollards in ramp channel.
Quantity: - Unit: UNIT Work Item: Desilting and expansion of existing sediment basin.
Quantity: - Unit: UNIT Work Item: Construction of RSP training berms with plant tubes.
Quantity: - Unit: UNIT Work Item: Construction of access platforms.
Quantity: - Unit: UNIT Work Item: Regrading of the basin area.
Quantity: - Unit: UNIT Work Item: Reconstruction of a gravel trail.
Quantity: - Unit: UNIT Work Item: Modification of upstream channel.
Quantity: - Unit: UNIT Work Item: Replacement of grouted rock section with gravel and fines in upstream channel.
Quantity: - Unit: UNIT Work Item: Shoring operations.
Quantity: - Unit: UNIT Work Item: Stream diversion operations.
Quantity: - Unit: UNIT Work Item: Dewatering operations.

NAICS Classification

NAICS 237990 – Other Heavy and Civil Engineering Construction (For overall fish passage, stream restoration, stream diversion, shoring, and dewatering implementations), NAICS 237310 – Highway, Street, and Bridge Construction (For roughened ramp channel, sediment basin expansion, regrading, and gravel trail construction, which often includes extensive earthwork and channel shaping), NAICS 238110 – Poured Concrete Foundation and Structure Contractors (For concrete step pool system and access platform construction)

Records and Due Date

This bid opportunity was entered into BidAmerica on February 25, 2026, and was last updated on February 25, 2026. All bids and/or proposals are due on March 24, 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.