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
Annual Chip Seal Program starts July 15
- Delays expected
- Alternative routes advised
- Program improves 15 Boulder County roads and lasts through mid-August
- See project website for more information including impacted roads, map, and schedule.
Lee Hill Drive Delays and Closures
- Through July 2019 – expect single lane closures and travel delays
- Beginning July 29 – daytime/weekday ROAD CLOSURES of Lee Hill Drive
- Bicycling restriction will be in effect 24/7
- See project website for map and more information
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
Fourmile Canyon and Gold Run Road Delays
- Normal Hours – 8 a.m. to 4:30 p.m. – Monday through Friday
- 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
- NON-RESIDENT CYCLING RESTRICTIONS IN FOURMILE CANYON DURING WORKING HOURS (see cycling impacts tab)
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
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
DAYTIME-WEEKDAY CYCLING RESTRICTIONS START MONDAY, JUNE 24, 2019
- No bikes – 7 a.m. to 5 p.m. – Monday through Friday
- July 4 and 5 excepted
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
- Apple Valley Road in Lyons – North St. Vrain Pipeline Relocation/Replacement
- City of Longmont and Town of Lyons working on pipelines in the area
- Will result in closures of Apple Valley Road and Antelope Drive
- Detours will be posted for Apple Valley Road
- Access to Hall Valley Ranch will be impacted. Use access of South St. Vrain Road/SH 7
- 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