CO 145 Passing Lane Addition North of Telluride

Project Facts

  • Cost: $5.4 million
  • Contractor: United Companies
  • Timeline: April - December 2019
  • Location: On CO 145 west/northwest of Telluride

This work will greatly improve safety for motorists on a two-lane stretch of Colorado Highway 145 north (or down-valley) of Telluride by:

  • widening the highway to add a southbound, uphill passing lane (toward Telluride); and
  • improving shoulders between mile point (MP) 73.9 at lllium Road (County Road 65L) and MP 75.1 at Deep Creek Road.

Passing lanes will provide space and opportunities for faster vehicles to safely pass slower-moving traffic.

To widen the roadway to accommodate the new southbound passing lane, crews will excavate the hillside along the northbound lanes. The work will involve the following:

  • building a reinforced soil slope and rockery retaining wall
  • installing new guardrail
  • replacing culverts at eight locations across the work zone, from Illium Road to the CDOT maintenance facility
  • constructing a concrete box culvert at Deep Creek
  • adjusting the roadway's banked curve and leveling its height to improve safety through cornering ease and increased sight distance

Schedule & Travel Impacts

Expect single-lane, alternating travel through the work zone through the project's completion in December.

  • April 15 through early July 2019
    *7 a.m. - 7 p.m., Monday - Friday (excluding dates listed below)
    Flaggers will direct single-lane, alternating traffic.
  • Early July through late December 2019
    *7 a.m. - 7 p.m., Monday - Friday
    Expect single-lane, alternating traffic controlled by either flaggers or temporary traffic signals at each end of the work zone.
    Access onto and off of Ilium Road (CR 65L) and Deep Creek Road will be maintained.

*These start/end times will be altered as necessary to accommodate the changes in daylight hours.

Please check weekly lane closures on

Please avoid distractions as you travel through the work areas and go slow for the Cone Zone.

No-Work Days

  • June 19-24: Telluride Bluegrass Festival
  • July 3-5: Independence Day holiday travel
  • July 12-14: The RIDE Festival
  • Aug. 8-11: Telluride Jazz Festival
  • Aug. 30 - Sept. 2: Labor Day holiday weekend
  • Sept. 13-16: Telluride Blues & Brews Festival
  • Nov. 27-29: Thanksgiving holiday

Unofficial Bike/Ped Trail is Closed

Trail Closure Map

Colorado: The Official State Web Portal