Boulder County Public Works manages construction projects in unincorporated Boulder County for roads, bridges, multi-use pathways, and drainages.
Construction-Related Travel Impacts
Use the Road Service Request Form to let us know about an issue on area roads.
Travel Impacts
95th Street (Valmont to Lookout Road) Reconstruction and Flood Safety Improvements – UNDERWAY – Road Closed Daytime/Weekdays
95th Street between Valmont and Lookout roads will see significant construction activity starting in April 2024 and lasting into early 2025. Currently, the road is closed from 8 a.m. to 4:30 p.m., Monday through Friday. The road will fully reopen at 4:30 p.m. on Tuesday, Dec. 31. Specific information is available on the project webpage. In addition, a new traffic signal and intersection configuration will be created at Lookout Road and 95th Street. This project will be undertaken at the same time as phase one of the 95th Reconstruction Project. Expect daytime, weekday lane shifts with short travel delays at the intersection.
120th Street CLOSURE for Willoughby Corner Housing Project Starts Sept. 9
Crews working on the Willoughby Corner Housing Project for Boulder County Human Services will close 120th Street between CO 7 and Emma Street starting Monday, Sept. 9. The closure will be in place for approximately 10-weeks, weather permitting. Learn more about the project.
East County Line Road – Zlaten Drive to St. Vrain Creek – Reconstruction Project Underway – FULL CLOSURE HAS BEEN LIFTED
Public Works is currently rebuilding East County Line Road between Zlaten Drive and St. Vrain Creek in order to widen the road and reduce some of the hills to increase safety for all travelers. The new road will include seven-foot wide paved shoulders in order to connect cyclists and pedestrians to the City of Longmont’s St. Vrain Trailhead. In order to complete this work, East County Line Road will see daytime, weekday lane shifts between Zlaten and Quicksilver. Visit the project webpage for more information.
CDOT CO 119/Diagonal Highway Safety, Mobility, & Bikeway Construction – UNDERWAY – Expect significant travel impacts
CDOT is currently working on this project, which will require significant travel impacts on CO 119/Diagonal Highway between Boulder and Longmont. This project is anticipated to be completed in the Spring of 2027.
Project Hotline – 720-378-8083
Project Email – co119safetyandmobility@gmail.com
Visit the project Webpage to learn more and to subscribe to the project email list
Thank you for your patience and understanding while we work to complete these projects.
For more information about Boulder County road travel impacts, please contact – Andrew Barth – 303-441-1032
Thank you for following restrictions! We apologize for any inconvenience.
Project Contact – Andrew Barth – 303-441-1032
CO 119/Peak To Peak Highway from Downtown Nederland to CO 72/Coal Creek Canyon – Highway Resurfacing – Starts in April/May
The Colorado Department of Transportation (CDOT) will resurface both lanes of CO 119 between the roundabout in Nederland to the intersection with CO 72/Coal Creek Canyon. Work is anticipated to start in April, weather permitting. The project is expected to take 3 months to complete. Expect single-lane closures with flaggers being used to direct traffic. Cyclists will be asked to merge with vehicles in the available lane through work zones. Advance tree removal/trimming work will take place in March. This work will also require lane closures. Zak Dirt is the contractor retained by CDOT to compete the project.
HELPFUL LINKS
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- Special Event Permit Requests – Pending & Approved taking place throughout Boulder County
- Utilize CDOT’s COtrip.org website to see real time traffic condition updates on state highways
- Learn about road closures in the City of Boulder at www.BoulderConeZones.net.
- City of Boulder Live Traffic Cameras
- Learn about road closures in Longmont
- Learn about road closures in Lafayette
- Learn about road closures in Louisville
- Learn about road closures in Erie