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

Riverside Drive at Cave Creek Culvert Replacement – Requires FULL ROAD CLOSURE

A new culvert will be installed at the Cave Creek crossing on Riverside Drive/CR 103, which is located just east of the intersection with Peak To Peak Highway/CO 72. This work will require a full closure of Riverside Drive at Cave Creek. Work will start at the end of March and the closure will begin on April 3 and last through July. All work is weather permitting. Residents of Riverside Drive west of Cave Creek (uphill) will need to use Peak to Peak Highway to access their properties. Residents of Riverside Drive east of Cave Creek (downhill) will need to use South St. Vrain Road/CO 7 to access their property. See map of the project location.

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.

Mountain Meadows Road CLOSED at Sugarloaf Road Starting June 10 – Detour to Mountain Pines Road

Road Maintenance will start a culvert replacement project on Monday, June 10 on Mountain Meadows Road at Bummers Gulch (view a map of the location). In order to safely replace the culvert, the road will need to be closed 24-hours a day, seven days a week for two weeks. Residents of Mountain Meadows and other side roads will need to detour to Mountain Pines Road in order to access their property.

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.


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Public Works Department (formerly Transportation)

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2525 13th St.
Boulder, CO 80304

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

Mailing Address

P.O. Box 471
Boulder, CO 80306