CO 82 Basalt Pedestrian Underpass

Project Facts

  • Cost:
    $6.2 million
  • Average Annual Daily Traffic:
  • Contractor(s): Oldcastle/United Companies
CO 82 Basalt

From September 2016 through October 2017, crews built a pedestrian underpass that now connects pedestrians and bicyclists to the Basalt Roaring Fork Transportation Authority transit station.


Work was completed on the following timeline:

  • September 2016 – March 2017: North Phase
    • Temporary bus stop placements
    • Building temporary lanes for vehicle traffic
    • Removing asphalt and excavating the underpass
    • Retaining wall construction along Basalt Avenue
  • March 2017 – August 2017: South Phase
    • Asphalt, excavation and retaining wall work
    • Final pavement, signals, striping, drainage and safety work
    • Reactivating bus stations
  • September 2017 – October 2017: Final Phase
    • Trail construction
    • Curb, gutter and guardrail installation
    • Final striping and landscaping


In September 2016, the Town of Basalt began building a pedestrian underpass beneath CO 82, at mile point 23.1. The project will improve safety for all transportation modes by allowing non-motorist traffic to pass under the highway.

The completed underpass will connect the Roaring Fork Transportation Authority parking lot with the Basalt Store front and Bus Rapid Transit stations at the intersection. Residents will also have easier, more convenient access to schools to the north and south of the project.

The new, fully illuminated underpass is designed to be 140 feet long, 16 feet wide and up to 9 feet tall. The construction of the underground path, combined with the installation of new traffic signals and an upgraded storm water drainage system, is anticipated to improve the flow of traffic and pedestrian safety along the highway.