CO 46 Resurfacing in Gilpin & Jefferson Counties

About the Project

The project consists of milling and paving 6.6 miles of Colorado Highway 46 to provide a safe, smooth driving surface, adding new lane striping and wayfinding signs, and cleaning culverts for improved storm drainage runoff.

Project Facts

  • Construction Cost: $2.6 million
  • Contractor: Martin Marietta
  • Timeline: September 2026 to October 2026
  • Location: CO 46
    • Nearest Town/City: Black Hawk
    • Mile Point(s): MP 0 to MP 6.6
    • Counties: Gilpin and Jefferson
Map of location and limits of construction of the Colorado Highway 46 Resurfacing project in Gilpin and Jefferson County.
Map of location and limits of construction of the Colorado Highway 46 Resurfacing project in Gilpin and Jefferson County.

Project Benefits

Goal is to improve safety and mobility along a two-lane highway in Gilpin County. Benefits include:

  • Restoring the road surface to optimal condition
  • Restriping and adding signs to improve safety and visibility

Work Schedule

To be announced.

Traffic Impacts

  • To be announced
  • Refer to COtrip.org for real-time travel conditions and road closures