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. 

  • Longmont Dam Road Flood Recovery and Stream Restoration - Lane reductions through June 2016
    • Expect lane closures 7 a.m. to 4:30 p.m. - Monday through Friday
    • Traffic control personnel will be used to move travelers through the work zone
    • Please use caution
    • Project website
    • Project Contact - Andrew Barth - 303-441-1032 or email 
  • Valmont Road project between 61st and 75th - Reduced speeds
    • Flood recovery project to move road to the south requires 25 mph speed limits
    • Temporary shoulder will be installed to accommodate cyclists
    • 8:30 a.m. to 4:30 p.m. - Monday through Friday
    • Project lasts from April 11 through May
    • Please use caution 
    • Project Contact - Andrew Barth - 303-441-1032 or email 
  • Monarch Road CLOSED at Dry Creek in Niwot - 24 hours a day/7 days a week - April 25 to July 15, 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 
  • N. 83rd Street CLOSED for flood recovery bridge construction starting March 9
    • 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
  • Geer Canyon Drive permanent flood recovery construction starts March 8 - One lane of travel open during work
    • Monday through Friday - 7 a.m. to 6 p.m.
    • Geer Canyon Dr. reduced to one lane during working hours 
    • Flaggers will be used to move travelers through the work zone
    • Heil Valley Ranch will remain open during construction
    • Project will last through May 2016
    • Project Contact - Andrew Barth - 303-441-1032 or email
  • Baseline Road lane closures between Gapter and Cherryvale roads
    • Lane closures necessary to complete a waterline replacement project
    • Cyclists will be asked to merge with motor vehcles
    • 9 a.m. to 4 p.m. - Monday through Friday
    • Expect delays - Traffic control personnel will be present to assist travelers
    • Project will last through March
    • Project Contact - Dan Kvasvnicka - 303-441-3201
  • Lefthand Canyon Drive Permanent Flood Recovery Construction - Dec. 14, 2015 through Nov. 2016 - MAJOR TRAVEL RESTRICTIONS IN PLACE
    • Visit the project website for complete information and to sign up for the project listserv. 
    • Work will begin between Olde Stage Road and James Canyon Drive - Dec. 2015 through May 20, 2016
      • Requires full road closures - 8 a.m. to 4 p.m. - Monday through Friday
    • Project Contact - Andrew Barth - 303-441-1032 or email
  • Salina Junction Permanent Flood Repairs  - 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 site will be controlled with traffic lights - 2 minute red lights with 15 seconds of green each way
    • Work expected to last through May 2016
    • Project Contact - Andrew Barth - 303-441-1032 or email
    • Project hotline provides additional project information - 303-730-4525 - updated weekly and as needed. 

Cycling - Projects impacting cycling

View the  Cycling Closure Map


Other Non-County Construction and Events resulting in travel restrictions

  • 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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