Closures & Construction

Construction-Related Travel Impacts

Boulder County Transportation manages the construction projects for roads, bridges, pathways, drainage improvements and trails. The projects listed on this page are related to flood recovery and regularly scheduled roadway maintenance.

County Road Projects with Travel Impacts

The following county roadway projects result in travel impacts to both motorists and cyclists. All dates and times listed are weather dependent. Please visit this page regularly for updates on the projects listed and for information on new projects. View the Roadway Closure Map to see these projects and where roads/bridges remain closed due to the 2013 flood.

  • Lefthand Canyon reduced to one-lane at Glendale Gulch – Starting Tuesday, Feb. 19, 2019
    • Culvert/roadway project requires single-lane reduction and traffic signal use 24/7 at Glendale Gulch (mile marker 7)
      • Project will reduce the curve at Glendale Gulch by realigning the road
    • Traffic signal will be in place 24/7 until May/June
    • Project Contact – Andrew Barth – 303-441-1032
  • N. 55th Street CLOSED for culvert replacement – Starting Tuesday, Feb. 19, 2019
    • N. 55th CLOSED at Boulder/Whiterock Ditch, just south of Pioneer Road
    • CLOSURE in place 24/7 until April/May
    • Project Contact – Andrew Barth – 303-441-1032
  • Fourmile Canyon Flood Recovery Work – Expect delays on Fourmile Canyon Drive and Gold Run Road
    • Normal Hours – 8 a.m. to 4:30 p.m. – Monday through Friday
    • Delays of up-to 15-minutes in/at:
    • Upper Fourmile Canyon (west of Salina Junction)
      • Project currently on hold until spring 2019
    • NON-RESIDENT CYCLING RESTRICTIONS IN FOURMILE CANYON DURING WORKING HOURS – SEE BELOW
    • Project Contact – Andrew Barth – 303-441-1032

Cycling – Projects impacting cycling

  • Fourmile Canyon Drive/Gold Run Road DAYTIME-WEEKDAY CYCLING NON-RESIDENT RESTRICTIONS
    • No recreational/non-resident cycling in Fourmile Canyon
      • 8 a.m. to 4:30 p.m. – Monday through Friday
      • CYCLING WILL BE ALLOWED from 4:30 p.m., Friday, Dec. 21 to 8 a.m., Wednesday, Jan. 2 as no construction will take place on these holidays.
    • Residential cycling exception – Residents must contact Boulder County Transportation for pass
      • Residents can contact Andrew Barth (info below) to obtain a residential cycling pass
    • SEE MAP
    • Restrictions in place due to increased volume of large truck traffic associated with three construction projects
      • Thank you for following restrictions
    • Project Contact – Andrew Barth – 303-441-1032

View the Cycling Closure Map .

Other Non-County Construction and Events resulting in travel restrictions

Contact Us

Transportation Department

303-441-3900
Submit a question

Location

2525 13th Street
Boulder, CO 80304

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Hours: 8 a.m. - 4:30 p.m. M-F

Mailing Address

P.O. Box 471
Boulder, CO 80306