01-0H2464 Install Welded Steel Pipe, Structural Concrete, & Alt Pipe Culvert

California Department of Transportation (Caltrans), District 01, is requesting bids to install welded steel pipe, structural concrete, and alternative pipe culverts on State Highway 101 in Humboldt County at multiple locations under Notice to Bidders 01-0H2464, with bids due December 3, 2026, at 2:00 p.m. via Bid Express.

Contractors must hold either a Class A license or a combination of Class C licenses (C-42, C-8, C-12) constituting a majority of the work. The project is federally funded (federal-aid project number ST-P254(010)) and requires prevailing wages compliant with both California Director of Industrial Relations determinations and United States Secretary of Labor minimum rates, with contractors obligated to pay the higher rate where discrepancies exist.

The scope encompasses 96 line items across traffic control, erosion control, drainage facilities, concrete structures, reinforcing steel, pipe culverts, slope protection, and miscellaneous construction materials. Work is performed on Route 101 at Post Mile 254 and Route 254 at multiple locations. Contractors must designate an on-site safety representative meeting specified certifications and qualifications, engage a professionally facilitated project partnering process, and retain contractor-supplied specialists including a biologist, arborist, and streambed restoration specialist for environmental compliance. Additional requirements include temporary creek diversion systems, aquatic species protection, invasive species control, submittal of environmental product declarations for hot mix asphalt and concrete, and prompt payment to subcontractors within 7 days of progress payments. Three trainees or apprentices are required under the federal training program.

The estimated project cost is $8.8 million on a cost-plus-time basis with completion required within 170 to 240 working days. Bidders must submit security equal to at least 10 percent of their bid amount. Coincident contracts 01-0H6404 and 01-0H2454 may operate concurrently in the project area, requiring coordination of lane closures and traffic handling. Detailed traffic control restrictions apply, including lane closure prohibitions during designated holidays and special event days.