Boulder County Public Works manages construction projects in unincorporated Boulder County for roads, bridges, multi-use pathways, and drainages.
Construction-Related Travel Impacts
County Road Projects
Sugarloaf Road Flood Recovery Project underway
Boulder County is currently working on the last 2013 flood recovery-related project on Sugarloaf Road. The project involves the construction of five retaining walls, drainage improvements, and reconstruction of approximately 2,000-feet of roadway just up from CO 119 and will include a four-foot shoulder in the uphill lane. During daytime, weekday working hours, expect up-to 20-minute delays on Sugarloaf Road as the road has been reduced to one lane. Flaggers will be used during the day to safely guide travelers. For afterhours traffic control, temporary traffic signals have been installed on Sugarloaf Road. In addition, CO 119/Boulder Canyon Drive will be reduced to one lane during working hours (8 a.m. to 4:30 p.m., Monday through Friday). Flaggers will be used to guide travelers on CO 119 during the lane closures. Residential cycling only (at all times) in the uphill direction on Sugarloaf Road. The project is anticipated to last into November, weather permitting. Learn more on the project webpage.
City of Boulder waterline project requires closures of Twin Lakes Road starting Nov. 7
A City of Boulder waterline project in Gunbarrel will require full closures of Twin Lakes Road in multiple locations starting Monday, Nov. 7. Work is expected to last two weeks. For more information, visit the city’s website or contact project manager Dan Kvasnicka via email or at 720-626-9080.
Thank you for your patience and understanding while we work to complete these projects.
Projects Impacting Cycling
Sugarloaf Road Construction – No uphill cycling between CO 119 and Betasso Road
Starting May 2, 2022, crews will begin constructing new retaining walls along the first 2,000-feet of Sugarloaf Road up from CO 119/Boulder Canyon. In order to complete this work, Sugarloaf will be reduced to one-lane in this stretch. Traffic signals will be used to control alternating traffic on the available lane. Due to the steep incline, cycling will not be allowed in the uphill direction through the construction zone Cycling will be allowed in the downhill direction. The project is anticipated to be completed in October 2022, weather permitting. Learn more.
Thank you for following restrictions! We apologize for any inconvenience.
- US 287 CLOSED in both directions between Dillon & Miramonte March 21 through March 26
- CO 7 – Lyons to Raymond/Riverside Flood Recovery Reconstruction Project – CDOT August 2021 to December 2022
- Expect significant travel delays and roadway closures starting in Sept. 2021
- Project Webpage
- Project hotline = 720-912-8870
- Project email = CO7Info@kiewit.com
- Text “CO7UPDATES” to 21000 to receive project text alerts
- 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.
- Learn about road closures in Longmont
- Learn about road closures in Lafayette
- Learn about road closures in Louisville
- Learn about road closures in Erie