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. 

  • Lefthand Canyon - Expect minor delays
    • Small work sites all through the canyon may require short (1-minute) delays if equipment is in the roadway
    • Flaggers will guide travelers safely around the work zones
    • Final stages of the Lefthand Canyon Flood Recovery Restoration Project
    • Project Contact - Andrew Barth - 303-441-1032 or email 
  • Daily weekday Apple Valley Road closure at the bridge on the west side Nov. 22 through March 2017
    • Flood recovery project
    • Road may be closed 8 a.m. to 4:30 p.m. - Monday through Friday - depending on the work taking place
    • Access will be maintained from the eastern end closest to Lyons
    • Project Contact - Andrew Barth - 303-441-1032 or email 

Cycling - Projects impacting cycling

  • IBM - LoBo Connector Trail - Construction Underway
    • Western portion complete - Eastern portion under construciton
    • Do not ride on the unfinished trail as it is unsafe in its current condition
    • Learn more about this project
    • Info - Matt Wempe - email or 303-441-3900

View the  Cycling Closure Map

Other Non-County Construction and Events resulting in travel restrictions

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