Call 001 C26942-COMBO

The Colorado Department of Transportation is soliciting bids for a major infrastructure project in Jefferson County, Colorado, under solicitation number C26942-COMBO, titled Call 001 C26942-COMBO, with a letting date of June 11, 2026, and a fixed completion date of August 17, 2029. The project involves replacing the existing US 6 and Wadsworth cloverleaf interchange with a tight diamond with loop design, reconstructing the bridge over Wadsworth and the McIntyre culvert, and lengthening all entrance and exit ramps. It also includes connecting the existing six-lane roadway sections between 8th Avenue and 4th Avenue in both directions and constructing approximately 10-foot multi-use paths on both sides of Wadsworth. Scope of work encompasses extensive site preparation including clearing, grubbing, and removal of trees, inlets, manholes, culverts, pipes, fiber optic cables, walls, sidewalks, curbs, gutters, and asphalt and concrete pavements. Earthwork includes over 24,000 cubic yards of structure excavation, class 1 and 2 backfill, flow-fill, mechanical soil reinforcement, and shoring across 17 designated areas. Drainage and erosion control measures involve storm drain inlet protection, erosion logs, and aggregate bags. Structural elements require drilled shafts ranging from 24 to 54 inches in diameter, precast panel facing, architectural precast concrete panels, and galvanized structural steel. Bridge components include special bridge drains, pipe and pedestrian railings, and bridge expansion devices. Utility installations comprise Ethernet switches, optical attenuators, accessible pedestrian signals, traffic signal equipment, communications and controller cabinets, microwave radar detectors, water service lines, 24-inch welded steel pipe, and 3-inch galvanized pipe. Paving includes detour pavement and new concrete surfaces in seven- and eight-inch thicknesses, along with safety edges. Geomembranes, reinforcing steel, reinforced concrete pipes, electrical conduits, signage systems, lighting control centers, and automated irrigation systems are also part of the project. Bidders must be pre-qualified and attend a mandatory pre-bid meeting on May 29, 2026, at CDOT Headquarters in Denver, either in person or virtually via meet.google.com/xzg-keob-bhk, providing full contact information for virtual attendance. Bids will be accepted only from