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. 

  • Niwot Road culvert replacement project will require alternating lane closures
    • Niwot Road to see alternating lane closures, on and off, for the next six weeks in order to complete a culvert replacement located east of Niwot High prior to 95th Street
    • 7:30 a.m. to 4 p.m., Monday through Friday
    • Local access maintained at all times
    • Work expected to take until end of February, weather permitting
    • Travelers can expect delays as flaggers are used to move vehicles through the project area
    • Project Contact =Andrew Barth- 303-441-1032
  • Pine Brook Hills Subdivision - ROADWAY OPEN
    • Crews began in Pine Brook Hills on July 28 
      • Pine Brook Road - OPEN
      • Bow Mountain Drive - OPEN
      • Timber Lane -  OPEN
    • Project Information Hotline - 720-452-6762 or email Public Information Team
  • Highway 119 Underpass at Airport Road - COMPLETE
    • Access to northbound Airport Road will remain open throughout the project. 
    • Project Contact =Andrew Barth- 303-441-1032

Cycling Restrictions

The following roads have travel restrictions for cyclists only due to safety concerns with the road surface and heavy construction traffic stemming from the 2013 flood event. Please respect the restrictions. Boulder County and CDOT are working to reopen these areas to cyclists as soon as possible. View the  Cycling Closure Map . (NOTE - The map is being updated so some closures and restrictions may not appear.)

  • James Canyon - Cycling restricted to locals with permits only - MONDAY THROUGH SATURDAY; OPEN ON SUNDAYS
    • Also applies to non-local vehicles and bikes- guests of residents and service vehicles permitted (i.e., mail, deliveries, school buses, contractors) 
    • Extensive flood recovery work taking place throughout the canyon
    • Heavy machinery + temporary roads = unsafe riding and driving conditions
    • Call 303-441-3650 to obtain a cycling permit if you are an area resident who commutes primarily by bicycle.

Other Non-County Construction and Events resulting in travel restrictions

Transportation Listserv 

Subscribe to the County's Transportation email listserv to receive timely information on projects, roadway closures, travel impacts and other information. 


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