Colorado River bridge replacement.

The California Department of Transportation (Caltrans) District 8 is soliciting bids for the replacement of the Colorado River bridge, replacing existing structure 54-0415 with new structure 54-1346. The project is located on the State Highway spanning San Bernardino County, California, and Mohave County, Arizona, from 0.5 mile east of Park Moabi Road overcrossing to 0.2 mile west of Oatman Highway overcrossing. The project timeline includes 850 working days for general work, with an additional 1,250 working days for plant establishment, totaling 2,100 working days. Bids must be submitted on a unit price basis via the Bid Express website by 2:00 p.m. on December 17, 2026, and must include bidder's security equal to at least 10 percent of the bid. At the time of award, the contractor must hold valid licenses in both Arizona and California, specifically requiring a Class A license or a combination of Class C licenses (C-8, C-21) in California. The scope of work is governed by comprehensive technical reports, including hydraulic, foundation, and materials reports, and involves strict adherence to environmental and safety regulations. Key requirements include compliance with the Clean Water Act, the California and federal Endangered Species Acts, and the presence of a Designated Biologist during ground-disturbing activities. Specific mitigation efforts for roosting bats and the handling of asbestos-containing materials by DTSC-registered transporters are required. The contract mandates Buy America compliance for iron, steel, and manufactured products, with a domestic content threshold exceeding 55 percent. Additionally, the contractor must adhere to prevailing wage rates determined by the California Department of Industrial Relations or the U.S. Secretary of Labor, whichever is higher.