Basalt Avenue Pedestrian Underpass


In September 2016, the Town of Basalt began a project to construct a pedestrian underpass beneath State Highway 82 (SH 82). The project will provide safety improvements for all modes of transportation by allowing non-motorist traffic to pass under the highway of Basalt Avenue.

The project is located on SH 82 near MP 23.1 in Basalt, approximately 19 miles outside of Aspen.  The new underpass will be built on the east side of Basalt Avenue at SH82. It will connect from the Basalt Store area to the bus station and parking lot.

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

The Town of Basalt awarded Oldcastle/United companies the $6.2 million bid for this project.


As of early November, construction crews have completed all of the initial erosion control measures for the project. All embankments have been built for the widening of the roadway and the temporary detours. Current work includes placement of base course material in preparation for paving operations, installation of new storm drainage as well as construction of temporary traffic signal poles.

Project Schedule

The 13 month project will began in late September and is scheduled for completion in late October 2017.  The tentative schedule of major phases of work planned for the project includes:

September 2016 – March 2017: North Phase

  • Temporary bus stop placements
  • Building temporary lanes for vehicle traffic
  • Removal of asphalt and underpass excavation
  • Retaining wall construction along Basalt Avenue

February 2017 – August 2017: South Phase

  • Asphalt, excavation and retaining wall work
  • Final pavement, signals, striping, drainage & safety work
  • Reactivation of bus stations

September 2017 – October 2017: Final Phase

  • Trail construction
  • Curb, gutter and guardrail installation
  • Final striping and landscaping

Work Hours

Normal working hours for the project will be Monday through Friday, from 7a.m. to 7 p.m., with seasonal adjustments for daylight hours. No work is planned on holidays or weekends.

Traffic Impacts

Additional impacts to travelers on SH 82 should be minimal. Five lanes of traffic will be maintained throughout the duration of the project with temporary asphalt pavement. 

Traffic speeds will be reduced to 35 mph in the work zone. Please use caution while traveling through the construction zone and follow flaggers’ directions.