Detours and Construction


Castle Creek Bridge / Hallam Street Improvement Project construction began on April 2, 2018 and has an estimated completion date of October 2018. The project will be constructed in three primary phases with a hold work period between phase II and phase III, from June 12 to August 12 during peak season. Each work period will have traffic, bike and pedestrian detours. Significant traffic delays are anticipated during peak travel times (Inbound: 7-9 AM / Outbound: 3-6 PM) for both inbound and outbound traffic.

The project crews will be working from approximately 7 AM to 7 PM, Monday through Friday and some Saturdays. Traffic control may begin setup as early as 6:30 AM. The schedule is dependent on weather, materials availability and overall schedule phasing.



During work periods requiring traffic detours, motorist should prepare for significant delays. A pedestrian and cyclist detour via Marolt Open Space Trail is anticipated to be in effect April to Mid-August.

  • Approximate Timelines:
    • Phase 0: April 2-5
    • Phase I: April 6-April 30
    • Phase II: April 30-June 11
    • Hold: June 12-August 12
    • Phase III: August 13-October



View the full project detour information in the project fact sheet.


Gould Construction is the contractor for the Castle Creek Bridge / Hallam Street Improvement Project. Gould Construction is based in Glenwood Springs and has completed multiple complex highway projects throughout the valley and in Aspen, and has direct experience working with the city of Aspen.