I-70 Improvements from Frisco to Silverthorne

Project Proximity Alert

Two more Summit County projects are happening in close proximity.  Each have their own prime contractors and construction teams. More information on these projects can be found on the project specific websites.

Other Summit County Projects:

Project Facts

Cost: $5.9 Million

Contractor:  United Companies

Timeline: May - October 2021

Location: I-70 from the Town of Frisco to the Town of Silverthorne

I-70 Aerial View at Dillon Reservoir

About the Project:

The Colorado Department of Transportation and prime contractor, United Companies, will begin construction on westbound lanes from Silverthorne to Frisco along I-70 starting the first week of May. Work is expected to go through late fall.
The project will span for approximately five miles from MM 203 to MM 207. Work will include the following items:

Repaving all westbound lanes in the construction zone

Removal and replacement of deteriorating portions of concrete bridge decks, which will improve the bridge’s integrity and longevity

Upgrades to existing guardrail; new features will help prevent future slope erosion

Work Schedule

The construction team understands I-70 is vital to local commuters and the economic health of Summit County. Minimizing impacts to visitors and residents has been considered. Therefore, work will take place from 7 p.m. to 7 a.m., starting on Monday nights and ending Friday mornings. Weekend work is not anticipated although schedules are subject to change. 

Traffic Impacts

  • While work is underway, only one westbound lane will remain open for motorists.
  • Bridge deck work may require additional closures. Sign up to receive updates on this project by contacting the project hotline or email (see below).

For information on road conditions and other construction happening across the state, visit

Colorado: The Official State Web Portal