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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.

Travel Impacts

County Road Projects

Baseline Road (at Cherryvale Road) Culvert Replacement

On Monday, Dec. 7, work will begin to replace a culvert on Baseline Road just east of Cherryvale Road. In addition, Xcel Energy will be working in the same area to replace some of their underground infrastructure. Work will take place between 8 a.m. and 4:30 p.m., Monday through Friday. Travelers along the road can expect lane closures and travel delays. A full road closure may be necessary to perform certain aspects of the work. The project is anticipated to last through January 2021.

US 287 & Isabelle Road Intersection Safety Improvements Project

  • Project Starts November 16, 2020
  • Regular Project Hours and Impacts
    • 8 a.m. to 4:30 p.m., Monday through Friday
    • Lane closures and traffic shifts on US 287 and on Isabelle Road
    • Expect delays – Alternate routes advised
  • Project anticipated to last until May 2021
  • Project Website

Longmont East County Line Construction Project

  • City of Longmont reconstructing East County Line Road between 9th and 17th avenues
  • July 2020 to April 2021
  • Expect travel delays – Alternate Routes Advised
  • Project Website

Thank you for following restrictions! We apologize for any inconvenience.

For more information about Boulder County road travel impacts, please contact – Andrew Barth – 303-441-1032

Projects Impacting Cycling

OLDE STAGE ROAD reduced to a single lane in two locations

  • Olde Stage Road construction requiring flaggers during daytime, weekday working hours
  • Expect work to last through August

South Boulder Road Emergency Repairs – Aug. 17 to Aug. 28

  • Emergency concrete panel replacement on South Boulder Road (SBR) between 55th Street and Cherryvale Road.
  • Expect Delays – lane closures and shifts on South Boulder Road
  • Cyclists will need to merge with motor vehicles in the travel lane
  • 8 a.m. to 4:30 p.m. – Monday through Friday
  • Project anticipated to last through August
  • Project website

Thank you for following restrictions! We apologize for any inconvenience.

Project Contact – Andrew Barth – 303-441-1032

Non-County Projects

Related Links

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Boulder, CO 80304

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