Figure 12- Rendering of Fourth Street Bridge, Pueblo, Colorado (rendering courtesy of ©FIGG).

Construction is beginning on Colorado Department of Transportation’s (CDOT) new Fourth Street Bridge on State Highway 96A in Pueblo, Colorado. CDOT awarded the construction contract on October 18, 2007 to Flatiron for $27,657,855; nearly $1 million less than the CDOT estimate. CDOT had permitted contractor alternates to the Figg cast-in-place concrete segmental design and received bids for two steel box designs, both of which were higher than the segmental design. CDOT savings over the lowest steel alternate approached $5 million or 18%. The new 1,140' long bridge consists of twin, cast-in-place post-tensioned segmental box girders built from above in balanced cantilever with form travelers, a first for the State of Colorado. Each box girder is 54' wide, accommodating two (2) travel lanes and a 10-foot multi-use sidewalk in each direction. It has five (5) spans, the longest of which is 378', a record for the longest span for a highway structure in Colorado. The design provides clear spans over both the Union Pacific Railroad and Burlington Northern Santa Fe Railroad facilities in the Pueblo Yard, thus allowing uninterrupted yard operations and minimizing impacts to these facilities and related costs for the owner. Agency and community focus and participation facilitated through the FIGG Bridge Design Charette™ Process has helped to ensure creation of a signature bridge for the State of Colorado and the City of Pueblo. A major aesthetic theme of Natural Environment along with reflecting on the Pueblo Heritage guided development of the bridge features. The bridge will be completed by June 9, 2011. Owner: Colorado Department of Transportation Designer: Figg Contractor: Flatiron Constructors Intermountain Construction Engineer: McNish Construction Engineering Inspection: CDOT and Figg for segmental