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71st Street Reconstruction Project

71st Street Reconstruction Project (Lookout Road to Highway 52)

Project Background

Boulder County Public Works, in partnership with the City of Boulder and CDOT Region 4, is planning to reconstruct 71st Street between Lookout Road and Highway 52. The reconstruction project will:

  • Widen 71st Street to include paved shoulders;
  • Realign the 71st/CO Highway 52 intersection farther east to improve safety;
  • Construct a new 10-foot wide concrete path along Lookout Road and down 71st Street to Winchester Office Park;
  • Replace the crossing of the Longmont-to-Boulder Trail with a new median-protected crossing;
  • Reconstruct one-block of Glacier View Road to fix long-standing drainage problems and to improve pedestrian access into the Gunbarrel Estates neighborhood; and,
  • Improve lighting and bicycle parking along the corridor.

Phase II Underway – Roadway closure has been lifted

Phase I from Lookout Road to Winchester Circle was completed in the spring of 2022. Phase II from Winchester Circle/Gunbarrel Tech Center to CO Highway 52 will begin construction in March 2023 and continue through the fall. In order to safely complete the work, the project will require the following traffic control measures at various times throughout construction:

  • Single-lane closures when the full roadway closure has ended
  • Merger of the shoulder/bike lane with the main travel lane
  • Intersection closures at CO 52 and N. 71st Street
    • Travel on CO 52 will be maintained in both directions at all times

Project Contact:

  • Andrew Barth, Public Works Communications, email or 303-441-1032

Current configuration of 71st Street

Current configuration of 71st Street

Proposed new alignment of 71st Street and CO Highway 52

Proposed new alignment of 71st Street and CO Highway 52

Contact Us

Public Works Department (formerly Transportation)

Submit a request


2525 13th St.
Boulder, CO 80304

Map and Directions

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

Mailing Address

P.O. Box 471
Boulder, CO 80306

71st Street reconstruction design image
Click on the image above to see a set of exhibits for the phase II reconstruction, which includes the intersection at CO Highway 52.