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. 

  • West entrance to Highland Drive, near Hwy 36, closed 24-7, Feb. 19 to March 20 for flood recovery culvert repairsHighland Drive Flood Repairs
    • Highland Drive at intersection of US 36 and CO 66 closed to all vehicles, cyclists and pedestrians
    • Access to Highland Drive maintained at the east entrance - approximately 2000 feet to the east of the intersection
    • 7 a.m., Thursday, Feb. 19 until 7 p.m., Friday, March 20
    • Crews replacing culvert that was damaged during 2013 flood
    • Contact - Andrew Barth - 303-441-1032 or via email

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.
  • COAL CREEK TRAIL Closed between County Road and 96th Street
    • City of Louisville working repairs and construction
    • Closed 24 hours a day - 7 Days a Week
    • Reopens on Friday, March 27 - Weather permitting
    • Contact - Louisville Open Space - 303-335-4836 - 
  • Learn more about safe cycling in Boulder County Canyons that are temporarily repaired

Other Non-County Construction and Events resulting in travel restrictions

  • Private Gas Utility Work at Valmont Rd and 75th Street
    • Alternating single-lane closures in place on 75th Street and sometimes on Valmont Road
    • Traffic control operations (flaggers) in place - 
    • 9 a.m. to 5 p.m.
    • Monday through Friday
    • Private crews replacing gas line for Xcel Energy
    • Contact - Travis Peters - Foreman Q3 Solutions - 720-454-5166
  • CDOT - SH 66 Overlay: US 287 to I-25
    • Begins Feb. 16, 2015
    • 6 a.m. to 8 p.m. - Monday through Friday from February to April - no significant travel delays expected
    • 8 p.m. to 6 p.m. - Sunday through Thursday - June and July - Expect delays 
    • Contact info - 844-253-3185 option #2
    • Project Email 
  • 2015 Special Events taking place throughout Boulder County
  • Fourmile Canyon Drive - EPA Mine Site Cleanup - Heavy roadway truck activity

  • US 36 Express Lanes Project - Boulder to Denver - Learn more about lane and ramp closures and other travel restrictions - Work being completed by CDOT 

  • Learn about road closures in the City of Boulder at

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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