Closures & Construction

Boulder County Transportation manages the construction projects for roads, bridges, pathways, drainage improvements and trails. The projects listed on this page are related to flood recovery and regularly scheduled roadway maintenance.


County Road Projects

The following county roadway projects result in travel impacts to both motorists and cyclists. All dates and times listed are weather dependent. Please visit this page regularly for updates on the projects listed and for information on new projects. View the Roadway Closure Map to see these projects and where roads/bridges remain closed due to the 2013 flood. 

  • Flagstaff Road - Daytime weekday lane closure - Sept. 26 to Oct. 17 - Paving Project
    • Flagstaff Road reduced to one lane between city limits and Flagstaff House Restaurant
    • 8 a.m. to 4:30 p.m. - Monday through Friday
    • Flaggers will be used to move cars around the work zone
    • Part of annual asphalt overlay project
    • Parking at Halfway House will be reduced to stage for work
    • Access to Gregory Canyon Trailhead will be maintained except when milling and paving equipment are moving in front of the entrance/exit
    • Project Contact - Andrew Barth - 303-441-1032 or email 
  • Baseline Road and Cherryvale Road - Daytime weekday lane closure - Sept. 28 to Oct. 21 - Paving Project
    • Baseline between Boulder city limits and Cherryvale Road
    • Cherryvale Road between Baseline and Baseline roads
    • Reduced to one lane 
    • Flaggers will move travelers safely around work zone
    • Part of annual asphalt overlay project
    • Access at Bobolink Trailhead will be maintained except when milling and paving equipment are moving in front of the entrance/exit. 
    • Access to Gapter Road will be maintained from Dimmit Drive at all times.
    • Project Contact - Andrew Barth - 303-441-1032 or email 
  • Baseline Road between Cherryvale and Lawn - Platt Middle School Safe Routes to School Sidewalk Project- Expect delays Monday through Friday
    • Lane closures in effect - Monday through Friday
      • M - T- Th - F - 9 a.m to 3:30 p.m.
      • Wednesdays - 10:30 a.m. to 3:30 p.m.
    • Working hours = 8 a.m. to 4:30 p.m. - Monday through Friday
    • Flaggers on site to move people safely through construction zones
    • Bikes will need to merge with traffic when lane is closed
    • RTD stop on north side of Baseline across from Platt Middle School temporarily relocated to the west of permanent location
    • Project Contact - Andrew Barth - 303-441-1032 or email 
    • Project website
  • Linden Loop & Pine Brook Road Paving -  Expect delays through September
    • 8 a.m. to 4:30 p.m. - Monday through Friday
    • Flaggers used to to move travelers around construction zone
    • Road open on weekends
    • Crews milling and installing new asphalt surface on Linden Loop and a short section of Pine Brook Road
    • Project anticipated completion date = End of September - weather permitting
    • Project Contact - Andrew Barth - 303-441-1032 or email 
  • North Cedar Brook Road & Linden Drive Culvert Project - Expect delays through November
    • Work takes place 8 a.m. to 4:30 p.m. - Monday through Friday
    • Traffic signal will be used to move travelers safely around the construction zone - 24/7
      • Traffic signal timed to allow cyclists to travel through zone in uphill direction
    • No work on weekends, but one lane will be closed at all times
    • Anticipated completion date = End of November - weather permitting
    • Project Contact - Andrew Barth - 303-441-1032 or email =
  • N. 83rd Street CLOSED TO ALL TRAVELERS (INCLUDING CYCLISTS) for flood recovery bridge construction 
    • N. 83rd closed 24/7 between Woodland Road and Larimer CO Rd 4
    • Crews constructing a bridge over Little Thompson River - Culverts destroyed during 2013 flood
    • Project anticipated to last until end of November - Weather permitting
    • Project Contact - Andrew Barth - 303-441-1032 or email
  • Lefthand Canyon Drive Permanent Flood Recovery Construction - through Nov. 2016 - MAJOR TRAVEL RESTRICTIONS IN PLACE
    • Visit the project website for complete information and to sign up for the project listserv. 
    • Project Contact - Andrew Barth - 303-441-1032 or email
  • Salina Junction Permanent Flood Repairs  - COMPLETE
    • Project Contact - Andrew Barth - 303-441-1032 or email 

Cycling - Projects impacting cycling

View the  Cycling Closure Map

  • Lefthand Canyon Reconstruction - SIGNIFICANT TRAVEL RESTRICTIONS FOR ALL MODES
  • N. 83rd Street CLOSED TO ALL TRAVELERS (INCLUDING CYCLISTS) for flood recovery bridge construction - THROUGH AUGUST 2016
    • N. 83rd closed 24/7 between Woodland Road and Larimer CO Rd 4
    • Crews constructing a bridge over Little Thompson River - Culverts destroyed during 2013 flood
    • Project anticipated to last until end of August - Weather permitting
    • Project Contact - Andrew Barth - 303-441-1032 or email
    • Learn more about safe cycling in Boulder County Canyons


    Other Non-County Construction and Events resulting in travel restrictions

    • CDOT - SH 7 (Estes Park to Raymond) - July 5, 2016 through Oct. 2017
    • Xcel Energy Gas Line Replacement on 95th Street requires lane shifts and travel delays
      • North 95th Street between Oxford and Isabelle roads
      • Project will require lane shifts and closures during working hours - Expect delays
      • January through December 2016
      • INFO - 1-855-875-7633 or email
      • Project Website
    • Permitted Special Events taking place throughout Boulder County
    • Learn about road closures in the City of Boulder at www.BoulderConeZones.net.

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