Unofficial Notice of Invitation to Bid (NIB)

San Bernardino County is seeking bids from qualified and interested contractors for the following project titled, Professional Geotechnical Services for Magnolia Storm Drain Project, identified under Solicitation ID: PWG126-ADMIN-6298. Work is to be performed near 825 E 3rd St, San Bernardino, CA 92415, USA in San Bernardino County.

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General Project Description

The San Bernardino County Flood Control District is seeking professional geotechnical services for the Magnolia Storm Drain Project (F02861) in the City of Chino and City of Ontario. The project aims to improve an existing 1.4-mile storm drain running along Mountain Avenue, Walnut Avenue, and Cypress Avenue by constructing a new reinforced concrete box (RCB) culvert to replace the undersized existing storm drain. This new culvert is designed to convey 100-year storm event flows. The scope of work includes comprehensive geotechnical investigations, evaluations of seismic design parameters, engineering properties of on-site soils, anticipated excavation and construction problems, analyses of bearing capacity and settlement characteristics, slope stability, and trench shoring recommendations. Deliverables include a Geotechnical Report, boring logs, and detailed trench shoring recommendations.

General Bid Items

Quantity: 1 Unit: LS Work Item: Geotechnical Report, Specifications: Signed and stamped by a California Professional Geotechnical Engineer. Must include evaluations of seismic design parameters; review of existing geotechnical information in the project area; evaluations of the engineering properties of on-site soils; types of materials to be encountered in proposed excavations; anticipated excavation and construction problems; location and extent of required over-excavation; bearing capacity and settlement characteristics of subgrade materials; required relative compaction of embankment material; slope stability analysis for channel side slopes (2H:1V and 1.5H:1V); compaction characteristics of the predominant soil; assessment of substances in the native soil deleterious to concrete, steel, or other construction materials; determination of applicable geotechnical-related data, properties, and coefficients necessary for shoring design; recommendations for Special Provisions using Caltrans Standard Specifications for construction; and factors for volume swell of excavation material and volume shrinkage of compacted materials for earthwork quantity calculations.
Quantity: 1 Unit: LS Work Item: Geotechnical Investigation boring logs
Quantity: 1 Unit: LS Work Item: Trench Shoring Recommendations during construction

NAICS Classification

NAICS 541330 – Engineering Services (Providing professional geotechnical engineering and consulting for design and construction phases of a flood control storm drain project)., NAICS 541620 – Environmental Consulting Services (May involve review of existing environmental conditions related to soil and water, and compliance with regulations).

Records and Due Date

This bid opportunity was entered into BidAmerica on February 19, 2026, and was last updated on February 19, 2026. All bids and/or proposals are due on March 13, 2026.

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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 Bernardino 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 Bernardino County prior to bidding.