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
Fourmile Canyon Drive Reconstruction – Expect delays, no bikes daytime, weekdays
- Project resumes Monday, May 18, 2020
- Roadway milling, grading, and paving to take place May 20 to Mid-June
- Work hours = 8 a.m. to 4:30 p.m., Monday through Friday
- Drivers can expect 15-minute delays
- NO BIKES during working hours
- Unsafe roadway surface
- High volume of large trucks and heavy equipment using narrow, winding road
- Project anticipated through early July
- Project website
South Boulder Road Reconstruction – Starts April 13, 2020
- Concrete panel replacement on South Boulder Road (SBR) between Cherryvale Road and McCaslin Blvd.
- Expect Delays – lane closures and shifts
- 8 a.m. to 4:30 p.m. – Monday through Friday
- Project anticipated to last through July
- Project website
Road Grading & Reclamation Operations
Seasonal gravel road grading operations are underway around the county. This year, several roads will be reclaimed to incorporate dust control material into the surface, which will create a stronger surface and helps dust control last longer. The following road will be reclaimed (dates are subject to change):
- Ogallala to Diagonal Highway – May 21
- Prospect to US 287 – May 26
- Pike from N. 119th to East County Line Road – May 28
- Quicksilver from North 119th to East County Line Road – June 2
- North 115th from CO 52 to Lookout Road – June 3 and 4
Expect delays and please give operators room to work.
Bridge repairs start April 27 at locations throughout the county
Expect lane closures and minor travel delays at the following bridges in Boulder County from late April into early June:
- Spring Drive at Davidson Ditch – April 27 to 30
- Brockway Drive at Goodhue Ditch – April 30 to May 4
- Flagstaff Road above Gregory Canyon – May 4 to May 8
- North 61st St. at Boulder Creek – May 8 to May 15
- Palo Parkway at Four Mile Canyon Creek – May 15 to May 22
- Nelson Road at Boulder Feeder Canal – May 22 to May 29
- St. Vrain Road at Boulder Feeder Canal – May 29 to June 5
Olde Stage Road Reconstruction begins May 2020
- Traffic signals in place 24/7 as road reduced to one lane in multiple locations to build retaining walls and replace culvert
- Expect extended delays when equipment and supplies are being moved in the available travel lane
- Working hours are 8 a.m. to 4:30 p.m., Monday through Friday, through August 2020
- Information – Project Website, or contact Andrew Barth – email – 303-441-1032
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
FOURMILE CANYON CYCLING RESTRICTIONS ARE IN PLACE STARTING MAY 18, 2020
- NO BIKES in Fourmile Canyon from 8 a.m. to 4:30 p.m., Monday through Friday
- Milling, grading, and paving operations are underway
- Road is in less than ideal condition (gravel surface) 24/7
- Expect work to last through June
OLDE STAGE ROAD – Gravel road surface in multiple locations – Traffic signals in place
- Use caution when riding along Olde Stage Road as the road has been reduced to gravel in places
- Two traffic signals in use. DO NOT RUN THE RED LIGHT
- Expect work to last through August
Thank you for following restrictions! We apologize for any inconvenience.
Project Contact – Andrew Barth – 303-441-1032
Non-County Projects
- Foothills Parkway/CO 157 – Lane shifts and closures due to pedestrian underpass construction by the City of Boulder
- Project goal is to build a new multimodal underpass in the same location
- Expect lane shifts on Foothills throughout construction
- Anticipated end date = August 2020
- Contact – Noreen Walsh – 303-441-4301 or walshn@bouldercolorado.gov
- 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
- 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