Rockfall mitigation work on CO 9 north of Silverthorne this week

Travel Advisory

May 23, 2022 - Northwestern Colorado - Motorists should plan for 20-minute intermittent holds

Summit County — On Monday, May 23, the Colorado Department of Transportation will begin rockfall mitigation work on Colorado Highway 9 approximately 15 miles north of Silverthorne. Work will take place near Green Mountain Reservoir, from Mile Point 120 to 123. The area is located about 14 miles south of Kremmling. Work will take place Monday through midday Thursday, May 26. Motorists should plan for intermittent, 20-minute closures to allow crews to safely conduct scaling and hauling operations. The roadway will be open during non-working hours.

Work on the rockfall mitigation will consist of hand and mechanical scaling at a few sites along the reservoir. The work is necessary due to increased rockfall activity this spring after a wet winter. Similar rock scaling work has taken place in the area in the past, due to continued deterioration of the slope next to the roadway

The rock mitigation work is necessary to help ensure safety for motorists on the roads. It also helps prevent rockfall damage to the road or passing vehicles. Work will be performed by contractor Geovert as part of CDOT’s geohazards program

If a safety closure is necessary on Interstate 70 in Glenwood Canyon, crews on this rockfall mitigation work will immediately work to adjust the project to accommodate detour traffic.

Traffic Impacts

  • Work is scheduled to take place 8 a.m. to 5 p.m., Monday through Wednesday.
  • Work will take place on Thursday, May 26, from 8 a.m. to 12 p.m.
  • No work is scheduled for Friday, to accommodate Memorial Day weekend traffic.
  • During work hours, motorists can expect 20-minute holds in each direction.

Project Information

For additional information about this project:

  • Call the project information line at 303.398.6603
  • Email the project team at: [email protected]

Know Before You Go

Travelers are urged to “know before you go.” Gather information about weather forecasts, anticipated travel impacts, and current road conditions prior to hitting the road. CDOT resources include:

Road conditions and travel information:
Download the FREE COtrip Planner app:
Sign up for project or travel alerts:
See scheduled construction lane closures:
Connect with @ColoradoDOT on social media: Twitter, Facebook, Instagram and YouTube.

Remember: Slow For The Cone Zone

The following tips are to help you stay safe while traveling through maintenance and construction work zones.

  • Do not speed in work zones. Obey the posted speed limits.
  • Stay Alert! Expect the unexpected.
  • Watch for workers. Drive with caution.
  • Don't change lanes unnecessarily.
  • Avoid using mobile devices such as phones while driving in work zones.
  • Turn on headlights so that workers and other drivers can see you.
  • Be especially alert at night while driving in work zones.
  • Expect delays, especially during peak travel times.
  • Allow ample space between you and the car in front of you.
  • Anticipate lane shifts and merge when directed to do so.
  • Be patient!

Download the COtrip App!

The new FREE COtrip Planner mobile app was designed to meet the growing trend of information on mobile and tablet devices for the traveling public. The COtrip Planner app provides statewide, real-time traffic information, and works on mobile devices that operate on the iOS and Android platforms. Visit the Google Play Store (Android devices) or the Apple Store (iOS devices) to download!