Stage 1 fire restrictions, enacted for unincorporated areas of western Boulder County.

Closures and Construction

Construction-Related Travel Impacts

Boulder County Public Works manages construction projects in unincorporated Boulder County for roads, bridges, multi-use pathways, and drainages.

Travel Impacts

Major construction activities planned for 2024 include:

  • Riverside Drive at Cave Creek Culvert Replacement – UNDERWAY – Full closure required at culvert location (see post on this page)
  • N. 119th Street at St. Vrain Creek bridge reconditioning – COMPLETE
  • Mountain Meadows Road (Sugarloaf) Culvert Replacement – Starts June 10 – Requires full roadway closure with detours
  • Chapman Drive pedestrian bridge installation in Boulder Canyon – Spring/Summer
  • LoBo Trail at Four Mile Creek bikeway underpass at BNSF Railway – Spring/Summer
  • 95th Street (Lookout to Valmont) Roadway Reconstruction – UNDERWAY through mid-2025 – Will require daytime, weekday road closures and full roadway closures
  • 120th Street (Overlook to Dillon) Reconstruction – Postponed to 2025 – Will require full roadway closure
  • East County Line Road (Zlaten Drive to CO 119) Reconstruction – Summer 2024 through Fall 2024 – Will require full road closure
  • Peaceful Valley Culvert Replacement – Summer – May require roadway closures
  • Baseline Road Culvert Replacement at Dry Creek #3 – Postponed to 2025 – Will require installation of temporary traffic signal
  • Overland Road Bridge Repairs – Summer through Winter – Will require single-lane roadway alignment
  • Jay Road (CO 119 to 63rd) Repaving Project – Summer through Fall – Will require single-lane closures during daytime, weekday operations
  • 75th Street at St. Vrain Creek Bridge Repairs – Postponed to 2025 – May require full roadway closure on 75th

*All dates for these projects are approximate and are subject to change

CO 119 Resurfacing – Nederland to CO 72/Coal Creek Canyon – Delays of up-to 10-minutes

Starting May 28, CDOT will begin a resurfacing project on CO 119 between the roundabout in Nederland and CO 72/Coal Creek Canyon. Work will start at the south end of the project and progress north. Travelers can expect single-lane closures and delays of up-to 10-minutes between 7 a.m. and 7 p.m., Monday through Friday. The project is anticipated to last through September, weather permitting.

Project Hotline – 970-795-7515
Project Email –
Visit the project Webpage to learn more and to subscribe to the project email list

75th Street – Arapahoe to Douglass Elementary – Roadway Rehabilitation – Daytime weekday lane closures start July 22

Starting Monday, July 22, the Road Maintenance Division will rehabilitate 75th Street from Arapahoe Road to Douglas Elementary, which is just north of Baseline Road. 75th Street will be reduced to one-lane between the hours of 7 a.m. and 4:30 p.m., Monday through Thursday, for approximately two weeks, weather permitting. A pilot vehicle will be used to shuttle cars through the work zone.

95th Street (Valmont to Lookout Road) Reconstruction and Flood Safety Improvements – Starts April 22, 2024

95th Street between Valmont and Lookout roads will see significant construction activity starting on Monday, April 2024 and lasting into 2025. The project will be completed in two phases. The first phase, which is the reconstruction of the roadway, will require daytime, weekday road closures. The second phase, which is the construction of a large new culvert system, will require a full roadway closure. Phase 2 is anticipated to start in September. 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.

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.


Contact Us

Public Works Department (formerly Transportation)

Submit a request


2525 13th St.
Boulder, CO 80304

Map and Directions

Hours: Building Open 8 a.m. to 4:30 p.m.
Tuesdays and Thursdays

Mailing Address

P.O. Box 471
Boulder, CO 80306