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.
Construction-Related Travel Impacts
Use the Road Service Request Form to let us know about an issue on area roads.
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
- Normal Hours – 8 a.m. to 4:30 p.m. – Monday through Friday
- NON-RESIDENT CYCLING RESTRICTIONS (see cycling impacts tab)
- Delays of up-to 15-minutes in/at:
- Lower Fourmile Canyon (just north of CO 119/Boulder Canyon Drive to Salina Junction)
- Gold Run
- Upper Fourmile between Wall Street and Sunset – Gravel roadway resurfacing
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
24/7 CYCLING RESTRICTIONS THROUGH OCTOBER 2019
- 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
DAYTIME-WEEKDAY CYCLING NON-RESIDENT RESTRICTIONS (updated May 16, 2019)
- 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
- James Canyon Drive – Single-lane closures for utility pole replacement
- Xcel Energy will be replacing utility poles along James Canyon drive throughout August.
- Expect daytime/weekday, single-lane closures
- Flaggers will move travelers safely around work areas
- Apple Valley Road in Lyons – Pipeline Relocation/Replacement
- City of Longmont and Town of Lyons working on pipelines in the area
- Closures of one end of Apple Valley Road are required
- Detours will be posted for Apple Valley Road
- Contact information – email or 303-651-8416
- SH 119/Boulder Canyon Drive Reconstruction Project – CDOT April 2019 to February 2021
- Expect significant travel delays and roadway closures
- Project hotline = 720-500-9912
- Project email = CDOTCO119@gmail.com
- Text “CO119” to 21000 to receive project alerts
- Northern Water – Southern Water Supply Project
- Northern Water is constructing a new pipeline between Carter Lake in Larimer County and Boulder Reservoir in Boulder County
- The project will also require short travel delays on Boulder County Roads including (see map):
- N. 75th Street
- N. 73rd Street
- N. 63rd Street
- Hygiene Road
- Niwot Road
- Project Website
- Contact Information
- Special Event Permit Requests – Pending & Approved taking place throughout Boulder County
- Learn about road closures in the City of Boulder at www.BoulderConeZones.net.
- Learn about road closures in Longmont
- Learn about road closures in Lafayette
- Learn about road closures in Louisville
- Learn about road closures in Erie