CO 9 Colorado River South Wildlife & Safety Improvements

Crews on this project are reconstructing an 11-mile segment of Colorado Highway (CO) 9 between Kremmling and Silverthorne. Project work, which will improve safety through the corridor, includes:

  • widening the shoulders to eight feet;
  • alignment upgrades;
  • installation of five wildlife underpasses and two overpasses

Work is expected to last through July 2017.

Project Facts

  • Cost:
    $40 million budget (RAMP)
  • Average Annual Daily Traffic:
    3,100 - 3,600

Project Team

  • Contractor(s): Kirkland Construction


Crews are conducting earthwork to widen the highway as well as constructing the southernmost wildlife underpass. Seeding operations are also underway to revegetate disturbed areas.

The wildlife overpass at mile point 129.5 has been placed over the roadway. Upcoming work will include continuation of both the wildlife underpass and overpass, as well as the installation of the deer fence along the highway.

Crews install new wildlife overpass
Crews install the new wildlife overpass

Road Surfacing Maintenance

Installation of new wilfelife overpass
Installation of the new wildlife overpass

The project team will institute precautionary measures to keep the roadway safe for travel and to limit dust conditions on the temporary roadway:

  • periodic magnesium chloride placement to limit dust
  • roadway surface blading when conditions dictate it as necessary
  • dust control via highway and haul road watering

Schedule and Traffic Impacts

During the day Monday through Friday, both northbound and southbound traffic will be reduced to one lane of alternating traffic. Road surface conditions will be extremely rough for the majority of construction as final paving operations will not occur until later in the project.

Please plan for delays of up to 45 minutes through the construction zone during working hours.

Alternate Routes

Alternate routes are highly advised. Motorists are encouraged to use US 40 and CO 131 to detour around construction. These routes will add 28-30 minutes to your trip.

Project Background

CO 9 is a major traffic route between Kremmling and Silverthorne in Summit and Grand counties. CDOT, Grand County, Colorado Parks and Wildlife, and the Blue Valley Ranch partnered on this project following numerous wildlife-vehicle collisions, and human fatalities, between mile posts 126 and 137. This narrow roadway, near the Green Mountain Dam Road and Colorado River Crossing, bisects feeding and watering habitat frequently used by wildlife.

In October 2013 the State Transportation Commission selected CO 9 for RAMP funding to fast track the safety-improvement project

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