BoCo Alert System

Boulder County administrative offices will be closed Monday, Jan. 21, in honor of Martin Luther King Jr. Day.

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.

  • North County Line Road/Larimer CR 2 – Lane & Full Road Closures for Culvert Project
    • Replacing culverts at the Little Thompson River crossing towards the western end of the road, near N. 83rd/CR 23E
    • Daytime, weekday lane closures at Little Thompson River during most of the work, except for the closure (see below)
    • FULL CLOSURE for two weeks – 7 a.m., Thursday, Jan. 10, 2019 through 7 p.m., Thursday, Jan. 24, 2019
      • No travelers will be allowed over the river during the closure (trucks, cars, bikes, etc.)
      • North County Line/LCR 2 residents with driveways west of the river will need to use N. 83rd/CR 23E
      • North County Line/LCR 2 residents with driveways east of the river will need to use N. 95th/S. CR 21
      • The closure timeline is weather dependent and could shift if snow impacts daily work
    • Anticipated project end date = February 2019
    • 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:
      • Intersection with Logan Mill Road – New bridge being built
      • Lower Fourmile Canyon (just north of CO 119/Boulder Canyon Drive to Salina Junction)
    • Upper Fourmile Canyon (west of Salina Junction)
      • Project currently on hold until spring 2019
    • Project Contact – Andrew Barth – 303-441-1032

Cycling – Projects impacting cycling

    • 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

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2525 13th Street
Boulder, CO 80304

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P.O. Box 471
Boulder, CO 80306