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. 

  • Salina Junction Permanent Flood Repairs start week of Nov. 30, 2015 - Expect travel delays
    • 8 a.m. to 4:30 p.m. - Monday through Friday
    • Expect up-to 15-minute travel delays during working hours
    • Longer delays may be needed - they will be posted here and on the project website 7-days in advance of the delay date
    • Work expected to last until April 2016
    • Project Contact - Andrew Barth - 303-441-1032 or email
    • Project hotline provides additional project information - 303-730-4525 - updated weekly and as needed. 
  • Bow Mountain Drive Drainage Project 
    • Bow Mountain Drive will be reduced to one lane with traffic control personnel assisting travelers through the work zone
    • 8 a.m. to 4:30 p.m. - Monday through Friday
    • Work is anticipated to last through November
    • Work is being done to install new drainage in the area that will keep water off the road and convey it around homes in the area.
    • Project Contact - Andrew Barth - 303-441-1032 or email
  • DELAYED - Monarch Road CLOSED at Dry Creek in Niwot - 24 hours a day/7 days a week - NEW START DATE FEBRUARY 2016
    • Culvert replacement project and sanitary sewer relocation
    • DETOUR - Monarch Road RESIDENTS EAST OF DRY CREEK should use 79th Street to access their home
    • DETOUR - Monarch Road RESIDENTS WEST OF DRY CREEK should use CO Hwy 119/Diagonal to access home
    • Work schedule is weather permitting
    • Project Contact - Andrew Barth - 303-441-1032 or email 

Cycling - Projects impacting cycling

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.)

Other Non-County Construction and Events resulting in travel restrictions

 Related Links