Show/Hide

The City of Boulder welcomes your feedback. Use our Inquire Boulder customer service tool to tell us what’s on your mind.

  • Transportation Division
  • Transportation Projects and Programs
  • Maintenance
  • Maps of the Transportation System
  • Transportation Master Plan
  • Airport
  • Transportation Safety
  • Great Options Boulder
  • Boards

Arapahoe Avenue Reconstruction (15th to Broadway)

The Arapahoe Avenue Reconstruction Project will provide much needed maintenance and improvements to all transportation modes to increase safety and comfort and to preserve this important thoroughfare. The project will also include improvements to the multimodal system and water utilities. The underpass on Arapahoe and 13th will also be reconstructed beginning this summer, to provide a safer, more accessible and less flood-prone underpass along the Boulder Creek Path.

Street reconstruction is largely finished with both vehicle travel lanes open as of Aug. 14. Construction on the underpass, sidewalks and crosswalks will continue through early 2019, resulting in some pedestrian and cyclist detours, intermittent traffic impacts and partial closure of Central Park. Please see below for more information.

Thank you for your patience during this project. For additional information about this project and other construction projects in the city, check out Cone Zones.

Travel Impacts

Both travel lanes are now open. as of Aug. 15. Northbound 13th Street at the Arapahoe intersection will remain closed until mid-September. 

No roadway work will take place during CU's move-in week, Aug. 18 - 25. 

Intersection Closures

The intersections of 13th and 14th streets are currently closed for utility work. Throughout the rest of August and into September, crews will finish up replacing the storm water box culvert under 13th  Street and Arapahoe and begin tree removals in the Civic Area in preparation for the underpass project. Once the box culvert work is complete, the 13th  Street intersection with Arapahoe will re-open to travel, likely the first week of September. 

Motor vehicle access to these streets is available from Canyon, with a detour to 13th St. through the alley on the west side of 14th St. Pedestrians and cyclists will be able to access these streets using signed detours, either through the underpass or using on-street crossings depending on the work being done.

Pedestrian and Bicycle Detours

The underpass at Arapahoe and 13th Street is closed, with a detour to an on-street crossing just north of 13th St.

Transit 

The JUMP bus has returned to its usual route along Arapahoe. There are no changes to transit routes or schedules as a result of this construction project at this time.

Central Park Impacts

Construction materials will be staged and some of the construction will take place in Central Park. Areas will be marked off, and there will be detours for pedestrians and cyclists.

Anticipated Completion

Landscaping, curb and gutter work will continue through the summer. This may include vehicle lane shifts, pedestrian and bicycle detours and single-lane closures between 8:30 a.m. and 2:30 p.m.

Construction of the new underpass at Arapahoe and 13th will continue to early 2019, resulting in intermittent closures and detours.

Access to Businesses, Farmers Market and Central Park

Access to the Farmers Market, Boulder High School, all businesses and other facilities in the Civic Area will be maintained throughout the project. Access to special events, such as the Hanuman Festival and the Boulder Creek Hometown Festival, will also be coordinated with the city special events team and event planners.

Project Details

This is a major project that includes several components:

  • Street, path and sidewalk reconstruction from 15th to Broadway to replace aging asphalt with concrete and improve multimodal facilities and drainage. Street reconstruction is substantially completed as of Aug. 14, 2018. Path and sidewalk reconstruction will continue.
  • Replacement of a storm sewer box culvert under 13th St. and the Smith-Goss irrigation ditch pipe along the south side of Arapahoe Ave., both of which are in deteriorated condition.
  • Reconstruction of the bicycle and pedestrian underpass at 13th St. to improve line of sight, reduce flooding and bring it up to accessibility and city standards.
  • Removal of 50 trees to allow for the utility and underpass work. New trees will be planted to replace those removed for the construction projects and additional landscaping will be completed near the adjacent areas.

Funding

$2.7 million in city transportation funds has been provided to complete the upcoming phase of the Arapahoe Avenue street reconstruction between 15th Street and Broadway. The completed phases of this project were funded by the 2011 voter-approved Capital Improvement Bond

Funding for the new underpass at Arapahoe and 13th St. is provided in part by the 2014 Community, Culture and Safety Tax.

Sign Up to Receive Email Updates

To sign up to receive periodic email updates with project news, impacts and milestones, please provide your email address. The other information is optional.

Past Meetings & Events

The project has been presented to the community along with the Arapahoe Underpass project.

Completed Phases

The deteriorated asphalt roadway along Arapahoe Avenue was reconstructed into concrete between Folsom and 15th streets, along with additional improvements to preserve and enhance this major travel corridor.

Construction began in June 2013 and was completed in fall 2014.

Past Meetings

Contact

For more information, contact:

Melanie Sloan ● Transportation Division ● 303-441-3266● [email protected]

or Comment on the Arapahoe Avenue Reconstruction Project.

For the latest construction and traffic information, visit boulderconezones.net.

Arapahoe Avenue Reconstruction, 13th to 15th Streets (Before and After)

Arapahoe Avenue Reconstruction (After)Arapahoe Avenue Reconstruction (Before)Arapahoe Avenue Reconstruction (After)Arapahoe Avenue Reconstruction (Before)Arapahoe Avenue Reconstruction (After)Arapahoe Avenue Reconstruction (Before)Arapahoe Avenue Reconstruction (After)Arapahoe Avenue Reconstruction (Before)Arapahoe Avenue Reconstruction (After)Arapahoe Avenue Reconstruction (Before)Arapahoe Avenue Reconstruction (After)Arapahoe Avenue Reconstruction (Before)Arapahoe Avenue Reconstruction (After)Arapahoe Avenue Reconstruction (Before)Arapahoe Avenue Reconstruction (After)Arapahoe Avenue Reconstruction (Before)Arapahoe Avenue Reconstruction (After)Arapahoe Avenue Reconstruction (Before)Arapahoe Avenue Reconstruction (After)Arapahoe Avenue Reconstruction (Before)Arapahoe Avenue Reconstruction (After)Arapahoe Avenue Reconstruction (Before)Arapahoe Avenue Reconstruction (After)Arapahoe Avenue Reconstruction (Before)Arapahoe Avenue Reconstruction (After)Arapahoe Avenue Reconstruction (Before)Arapahoe Avenue Reconstruction 15th to 13th (3)Arapahoe Avenue Reconstruction 15th to 13th (1)Arapahoe Avenue Reconstruction 15th to 13th (2)

See full photo set in the Photo Gallery

View Full Site