Closures & Construction

Construction-Related Travel Impacts

ANNOUNCEMENT: Niwot Road eastbound traffic only on September 16, 19, and 20 from 8 a.m. to 4:30 p.m.

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.

Travel Impacts

County Road Projects

Niwot and Neva roadway repaving

  • Expect lane closures & delays from 8 a.m. to 4:30 p.m., Monday through Friday
  • No westbound traffic on Niwot Rd. from CO 119 to 79th on Monday, Sept. 16 and Thursday and Friday, Sept. 19 and 20. View detour details.
  • Delays of up-to 10-minutes are possible. Alternate routes advised.

Chip Seal Operations on Overland Road

  • West of Jamestown
  • September 16 through September 19, 2019
  • 7 a.m. to 4:30 p.m.
  • Expect brief delays

Copperdale Lane Emergency Culvert Replacement

  • Sept. 23 and 24 from 7 a.m. to 4:30 p.m.
  • Expect lane closures
  • Detour via Rudi Lane and Camp Eden Road

75th Street Pedestrian Access Improvement Project

  • Begins September 9th, 2019; working between 7:30 a.m. to 4:30 p.m. — Monday through Friday
  • Expect lane closures and traffic shifts near the intersections of:
    • 75th Street and S. Heatherwood Drive
    • Ashfield Drive and S. Heatherwood Drive

Utica Street in Ward (top of Lefthand Canyon Drive) reduced to one-lane

  • Retaining wall/roadway reconstruction project requires single-lane reduction, 8 a.m. to 4:30 p.m. weekdays

95th Street Delays and Lane Closure

  • Daytime, weekday lane reductions and shifts controlled by flagging personnel
  • Alternate routes advised
  • Bicycling discouraged during working hours
  • See project website for more information

Lee Hill Drive Delays and Closures (NO BIKES)

  • Work underway – daytime/weekday ROAD CLOSURES of Lee Hill Drive
    • Bicycling restriction effective at all times
  • See project website for map and more information

Fourmile Canyon and Gold Run Road Delays

Thank you for following restrictions! We apologize for any inconvenience.

For more information about Boulder County road travel impacts, please contact – Andrew Barth – 303-441-1032

Projects Impacting Cycling

Lee Hill Drive Repaving & Guardrail Replacement


  • No bikes 24/7 FOR YOUR SAFETY
  • STRICTLY enforced by Boulder County Sheriff’s Office
  • Thank you for your patience.

The single-lane construction zone is currently 1,200 feet long with a 2-foot-deep trench as displayed. Closures are to maintain safety for all roadway users. Violations may result in citations.

Fourmile Canyon Drive/Gold Run Road


  • No recreational/non-resident cycling in Fourmile Canyon
    • 8 a.m. to 4:30 p.m. – Monday through Friday
  • Cycling permitted on major holidays
    • Independence Day – Thursday, July 4
    • Labor Day – Monday, Sept. 2
  • Residential cycling exception – Residents must contact Boulder County Transportation for pass
    • Residents can contact Andrew Barth (info below) to obtain a residential cycling pass
  • Restrictions in place due to increased volume of large truck traffic associated with three construction projects

Thank you for following restrictions! We apologize for any inconvenience.

Project Contact – Andrew Barth – 303-441-1032

Non-County Projects

Related Links

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2525 13th Street
Boulder, CO 80304

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Hours: 8 a.m. - 4:30 p.m. M-F

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P.O. Box 471
Boulder, CO 80306