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.
- North County Line Road/Larimer CR 2 – Lane & Full Road Closures for Culvert Project
- Replacing culverts at the Little Thompson River crossing towards the western end of the road, near N. 83rd/CR 23E
- Daytime, weekday lane closures at Little Thompson River during most of the work, except for the closure (see below)
- FULL CLOSURE for two weeks – 7 a.m., Thursday, Jan. 10, 2019 through 7 p.m., Thursday, Jan. 24, 2019
- No travelers will be allowed over the river during the closure (trucks, cars, bikes, etc.)
- North County Line/LCR 2 residents with driveways west of the river will need to use N. 83rd/CR 23E
- North County Line/LCR 2 residents with driveways east of the river will need to use N. 95th/S. CR 21
- The closure timeline is weather dependent and could shift if snow impacts daily work
- Anticipated project end date = February 2019
- 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:
- Intersection with Logan Mill Road – New bridge being built
- Lower Fourmile Canyon (just north of CO 119/Boulder Canyon Drive to Salina Junction)
- Upper Fourmile Canyon (west of Salina Junction)
- Project currently on hold until spring 2019
- NON-RESIDENT CYCLING RESTRICTIONS IN FOURMILE CANYON DURING WORKING HOURS – SEE BELOW
- Project Contact – Andrew Barth – 303-441-1032
Cycling – Projects impacting cycling
- Fourmile Canyon Drive/Gold Run Road DAYTIME-WEEKDAY CYCLING NON-RESIDENT RESTRICTIONS
- No recreational/non-resident cycling in Fourmile Canyon
- 8 a.m. to 4:30 p.m. – Monday through Friday
- CYCLING WILL BE ALLOWED from 4:30 p.m., Friday, Dec. 21 to 8 a.m., Wednesday, Jan. 2 as no construction will take place on these holidays.
- 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
- 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 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