C-470/Santa Fe Flyover Design-Build

Littleton, Colorado

Tsiouvaras Simmons Holderness teamed with Edward Kraemer & Sons to provide a connection between southbound Santa Fe Drive and eastbound C-470 in Littleton, Colorado. The new flyover bridge spans over Santa Fe Drive (US 85), C-470, Wolhurst, a UPRR bridge, and a BNSF bridge. The bridge consists of 12 spans with a total length of 1,728 feet and was constructed on a 900-foot horizontal radius. The design utilized spliced, curved precast U-girders and an innovative precast pier cap design to minimize impacts to the roadways and railroads below and to reduce construction cost. The innovative design allowed the project to be completed 5 months ahead of schedule with reduced night work. The $17.2M project was bid $1M under the engineers’ estimate.

  • Spliced, curved precast tub girders supported on hammerhead piers with precast caps
  • Designed bridge girders for a horizontal radius of 900 feet