Closures & 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

County Road Projects

Boulder County Road Maintenance is currently focused on keeping roads safe and navigable during the winter months. Major construction activities planned for 2023 include:

  • North 71st Street reconstruction between Lookout Road and CO 52 – UNDERWAY – Will require full roadway closure starting March 20
  • Crane Hollow Road culvert installation – COMPLETE
  • 2nd Avenue paving in Niwot – spring 2023
  • Overland Road at South St. Vrain culvert and bridge repairs – spring/summer 2023
  • Longmont Dam Road bridge repairs – spring 2023
  • 95th Street at Lookout Road intersection safety improvements – spring/summer 2023
  • Buckingham Road drainage improvements – spring/summer 2023
  • East County Line Road (Zlaten to St. Vrain) realignment and reconstruction – summer 2023 – Requires full roadway closure
  • Jay Road repaving CO 119 to 63rd Street – summer/fall 2023
  • Hygiene Road at Foothills Reservoir road and drainage improvements – fall/winter 2023 – May require full roadway closure
  • 95th Street (Lookout to Valmont) Roadway Reconstruction – winter 2023 through summer 2024 – Will require full roadway closure

N. 71st Street – Winchester Circle to CO Hwy 52 – CLOSED starting Monday, March 20

Phase II of the N. 71st Street Reconstruction Project will start on Monday, March 13. This phase of the work requires a full closure of N. 71st Street between Winchester Circle/Gunbarrel Tech Center and CO Hwy 52/Mineral Road (see map) starting Monday, March 20 through June 2023. Learn more about the project and associated travel impacts on the project webpage.

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

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.

Project Contact – Andrew Barth – 303-441-1032

Non-County Projects

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Boulder, CO 80304

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Boulder, CO 80306