CDOT US 6 Bridges Design-Build

The US 6 Bridges Design Build project included improvements along US 6 in the heart of the Denver Metro Area from west of Knox Court through the existing US 6 bridge over the BNSF Railroad just east of I-25. Major construction activities began on February 14, 2014 and the project was substantially complete with traffic in its final configuration on October 19, 2015. Construction took place adjacent to live traffic with up to 10,000 vehicles per hour during peak periods. The project: replaced six existing and built six new bridges; built new ramp structures and C/D roads to accommodate traffic exiting/entering US 6; constructed a bicycle/pedestrian bridge over US 6 to connect Barnum Parks North and South; and improved mobility through the I-25/US 6 interchange. Counter-intuitive to most design-build projects, Kraemer delayed the start of construction nine months following notice to proceed as part of an innovative phasing approach to minimize impacts during construction and to deliver the project ahead of schedule. Despite unforeseen challenges and a seven week delay, the team delivered the project eight months ahead of the RFP-defined date.