CO 103 Bridge Reconstruction

Project Status: Completegreencheckmark

CO 103 at Idaho Springs

The Colorado Highway (CO) 103 Bridge over I-70 reopened to traffic in February 2015. Reconstruction of each of the on-ramps and off-ramps in this interchange began in late April.

The bridge itself over I-70 will remain open to vehicles and crews will rebuild these ramps in phases to keep traffic moving through a portion of the interchange. These phased closures, their anticipated duration and the associated detours are as follows:

  • The new westbound I-70 off-ramp to CO 103 (Exit 240) will be built adjacent to the existing off-ramp to maintain access to the downtown Idaho Springs Business and Historic District.
  • Reconstruction of the CO 103 on-ramp to westbound I-70 is complete.
  • Reconstruction of the CO 103 on-ramp to eastbound I-70 is complete.
  • Reconstruction of the eastbound I-70 off-ramp to CO 103 is complete.
Contact Us
  • Media Contact:
    Stacia Sellers
    Communications Specialist
    Email Stacia.
Planning a Trip?

Slower speeds in construction zones may temporarily delay travel times.  We want to make sure you have access to events, trails and towns that make Colorado great. Use the resources below to help you prepare:

  • Sign up for free email and text alerts with CDOT’s GovDelivery service
  • Call the project hotline (303-223-6581) to listen to the most recent lane closure report
  • Visit


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