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.
- Subscribe to the Transportation Email Listserv to receive timely project updates and other construction information
- Use the Road Service Request Form to let us know about an issue on area roads
County Road Projects with Travel Impacts
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.
- Lee Hill Drive Resurfacing and Guardrail Replacement
- Work underway
- Project anticipated to last into October 2019
- Resurfacing of Lee Hill between Olde Stage Road and Deer Trail Road
- Guardrail replacement along the corridor
- Expect single lane closures (some in place 24/7) and travel delays up to 15-minutes
- A traffic signal will be set up when lane closures are required over night
- Signal location will be near the intersection with Olde Stage Road
- A traffic signal will be set up when lane closures are required over night
- Bicycling restricted between Olde Stage and Deer Trail – daytime/weekdays – Starting Monday, June 24 (more info below)
- Project Contact – Andrew Barth – 303-441-1032
- 95th Street (Lookout to Plateau) Reconstruction
- Daytime, weekday lane reductions and shifts – Expect longer delays (15 to 20 minutes) controlled by flagging personnel
- Alternate routes advised
- Bicycling discouraged during working hours
- Project Contact – Andrew Barth – 303-441-1032
- 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
- Project Contact – Andrew Barth – 303-441-1032
- Fourmile Canyon Flood Recovery Work – Expect delays on Fourmile Canyon Drive and Gold Run Road
- 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 BELOW
- Project Contact – Andrew Barth – 303-441-1032
Cycling – 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
- Project Contact – Andrew Barth – 303-441-1032
- 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
- SEE MAP
- Restrictions in place due to increased volume of large truck traffic associated with three construction projects
- Thank you for following restrictions
- Project Contact – Andrew Barth – 303-441-1032
- No recreational/non-resident cycling in Fourmile Canyon
View the Cycling Closure Map .
Other Non-County Construction and Events resulting in travel restrictions
- 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