CO 9 (Summit Boulevard) bridge over I-70 closed from 8 a.m. on Tuesday until noon Friday, June 1

May 25, 2018 - Northwestern Colorado/CDOT Region 3

SUMMIT COUNTY – South Colorado Highway 9 (Summit Boulevard) over Interstate 70 near the Town of Frisco will be closed for bridge repairs starting on Tuesday, May 29 at 8 a.m. A portion of the roundabout at the westbound I-70 ramps will also be closed. All lanes will reopen by 12 p.m. on Friday, June 1.

Repair work requires the full closure of South CO 9 between the eastbound and westbound I-70 ramps. All ramps will remain open during the full closure. The signed detour routes use adjacent interchanges to turn around.  

Detour routes:

To southbound South CO 9 from westbound I-70:

To westbound I-70 from northbound South CO 9:

  • Enter eastbound I-70

  • Take exit 205 (East US Highway 6 / North CO 9 / Silverthorne / Dillon)

  • Turn left on North CO 9

  • Pass under I-70

  • Turn left to enter westbound I-70

A detour map is available at All work is weather-dependent and the schedule is subject to change. Any full closure schedule changes will be posted on message boards placed along the corridor and on the project website

Once the bridge reopens, a temporary traffic shift will be in place for several weeks while crews finish bridge repairs.


The Colorado Department of Transportation and contractor partner, A & S Construction, have completed concrete curb ramp replacement between I-70 and Main Street sooner than anticipated. Once temperatures are favorable for asphalt paving in July, crews will mill and replace the top two inches of the existing roadway. Milling and paving work will be scheduled overnight to minimize traffic and access impacts. Project completion is expected in September 2018.The total construction cost is approximately $3.3 million and the project is funded through state-wide resurfacing funds.

Additional information is available by calling the project hotline at 970-368-0133, sending an email to [email protected] or visiting the website at

For real-time information regarding traffic impacts on any state highway, motorists can sign up for CDOT email and text alerts by visiting and clicking on the small envelope icon at the bottom right of the page. Updates are also available via Twitter @coloradodot and Facebook (