Boulder County Public Works manages construction projects in unincorporated Boulder County for roads, bridges, multi-use pathways, and drainages.
Construction-Related Travel Impacts
63rd Street CLOSURE Between Jay and Twin Lakes Roads For Culvert Install Starts in November
The Road Maintenance Division will be replacing a deteriorating culvert at the Boulder Lefthand Ditch starting November. The work will require a full closure of 63rd Street between Jay Road and Twin Lakes Road through December, weather permitting. View a map of the project location, road closure, and detour. 63rd Street is also closed south of Jay Road for the City of Boulder’s waterline replacement project. Jay Road will remain open at all times at 63rd Street. Cyclists and pedestrians will also be detoured around the work zone. Access RTD’s 205 bus route from stops along N. 63rd Street that are located north of Gunbarrel Avenue.
Sugarloaf Road Culvert Replacement at Betasso Road Underway – Expect travel delays
Two culvert replacements on Sugarloaf Road at Betasso Road require lane closures and the installation of a temporary 3-way traffic signal, which will result in travel delays. Work is underway and is anticipated to last into November 2025. Access to Betasso Preserve will be maintained.
City of Boulder 63rd Street Waterline Replacement – FULL CLOSURE OF 63rd/61st Street between Jay Road and Andrus Road in place through February 2026
The City of Boulder is conducting a waterline replacement project that will have several traffic impacts through 2025 and into 2026. Please view the City of Boulder’s project webpage for specific information.
CDOT CO 119/Diagonal Highway Safety, Mobility, and 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 CDOT’s CO 119 project Webpage to learn more and to subscribe to the project email list
HELPFUL LINKS
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- Special Event Permit Requests – Pending and Approved taking place throughout Boulder County
- Utilize CDOT’s COtrip website to see real time traffic condition updates on state highways
- Learn about road closures in the City of Boulder
- 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