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Sugarloaf Road Flood Repair Project

Sugarloaf Road Flood Repair Project

Sugarloaf Road near the intersection of CO 119/Boulder Canyon Drive was damaged during the flood of September 2013. Boulder County Public Works made temporary repairs shortly after the flood. A new retaining wall system has been designed to replace the temporary wall that is currently in place. In addition, new walls will be built to help make the roadway more resilient towards future weather events. Construction is anticipated to start in the summer of 2021.

News/Upcoming Meetings:

There are currently no meetings scheduled.

Previous Meetings

Scope of Work:

The scope of repairs include, but are not limited to:

  • Reconstruct 1890 feet of retaining wall where the slope is currently unstable
  • Repair retaining wall where it is damaged but still stable
  • Improve drainage by regrading ditches and adding new culverts
  • Reconstruct 1930 feet of roadway to meet current county standards, which includes a 4-foot wide uphill shoulder
  • Replace all guardrail (approximately 1580 feet)

The project is reimbursable by FEMA.


  • Design and permitting – underway
  • Anticipated bid release – Spring 2021
  • Construction – Summer 2021 through the end of 2021

Anticipated Travel Impacts:

  • Alternating single-lane closures in place 24/7. Traffic signals will be used after working hours.
  • Flaggers will be used during most of the project
  • A lane on SH 119 may be closed to accommodate the retaining wall work.
    • We are hopeful that traffic will be shifted onto the shoulder to reduce the need for the lane closure

Cycling During Construction

Recreational cycling will only be permitted in the downhill direction on Sugarloaf Road. Residents who commute by bike will need to obtain a residential cycling pass from Boulder County Public Works by using the contact information at the bottom of this page.

Project Contact:

  • Andrew Barth – Communications – email – 303-441-1032

Sugarloaf Road flood recovery project renderings

Contact Us

Public Works Department (formerly Transportation)

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2525 13th Street
Boulder, CO 80304

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P.O. Box 471
Boulder, CO 80306