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 side work only period between phase II and phase III, from June 13 to September 3 during peak season. Each work period will have traffic, bike and pedestrian detours. Significant traffic delays are anticipated for both inbound and outbound traffic. Peak travel times are 7-9 AM for inbound traffic and 3-6 PM for 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. Dates and routes are approximate and are subject to change.

  • Approximate Timelines:
    • Phase 0: April 2-5
    • Phase I: April 6-April 30
    • Phase II: April 30-June 12
    • Summer/No work affecting Hallam: June 13-September 3
    • Phase III: September 4-October 31, November TBD




View the most recent project detour information in the project fact sheet. Past phases are listed below.


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.