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.
Construction-Related Travel Impacts
Use the Road Service Request Form to let us know about an issue on area roads.
Travel Impacts
County Road Projects
US 287 & Isabelle Road Intersection Safety Improvements Project
- PHASE I CLOSURE of Isabelle Road between US 287 and N. 111th for four or five weeks starting Monday, April 19
- Closure in place 24 hours a day, 7 days a week
- Isabelle CLOSED from US 287 St. to N. 111th St.
- See map of CLOSURE area
- No cars, bikes, or pedestrians
- N. 109th Street CLOSED at Isabelle Road during the same timeframe
- Follow posted detours
- Flatiron Drive open to local residents only
- Project Hours are 7 a.m. to 7 p.m., Monday through Saturday
- Impacts to US 287
- Daytime, weekday lane closures and traffic shifts on US 287
- Expect delays – Alternate routes advised
- PHASE II CLOSURE of Isabelle Road – N. 95th to US 287 once east side closure has been lifted
- Residential traffic only on Isabelle between N. 95th and US 287
- Project anticipated to last until August 2021
- Project Website
2021 Gravel Road Reclamation Program
- Numerous gravel roads will be reclaimed from April to August 2021
- Work Hours = 6:30 a.m. to 4:30 p.m., Monday through Thursday
- Travel on roads being reclaimed will be limited to residents and emergency responders during working hours
- Learn more
71st Street Construction Project
- Culvert installation, roadway, and multi-use path/trail improvements
- January 2021 through June 2021
- Expect travel delays due to daytime, weekday single-lane closures
- Project Website
Jay Road resurfacing project requires lane reductions between CO 119 and 28th Street/US 36
- Lane closures and traffic shifts
- 8 a.m. to 5 p.m. – Monday through Friday
- Cyclists will need to merge with traffic when shoulder is under construction
- Expect delays
- Project webpage
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
- N. 71st Street CLOSED between Lookout Road and CO 52 through March 2021 (project webpage)
- CDOT lifts Boulder Creek Trail Closure between City of Boulder and Fourmile Canyon Drive
Thank you for following restrictions! We apologize for any inconvenience.
Project Contact – Andrew Barth – 303-441-1032
Non-County Projects
- SH 119/Boulder Canyon Drive Reconstruction Project – CDOT April 2019 to Summer 2021
- Expect significant travel delays and roadway closures
- Project hotline = 720-500-9912
- Project email = CDOTCO119@gmail.com
- Text “CO119” to 21000 to receive project alerts
- Special Event Permit Requests – Pending & Approved taking place throughout Boulder County
- Learn about road closures in the City of Boulder at www.BoulderConeZones.net.
- Learn about road closures in Longmont
- Learn about road closures in Lafayette
- Learn about road closures in Louisville
- Learn about road closures in Erie