- 740 miles of roadway
- 401 miles of paved road (asphalt and concrete)
- 339 miles of gravel road
- Learn more about county roads, bridges and culverts
- 18 traffic signals & 7 school-zone flashing signs
Public Works Department - Building Services, Fleet Services, Resource Conservation, Road Maintenance, and Transportation Engineering
What's New?
Fairgrounds Master Plan Project
The Fairgrounds Master Plan will guide the evolution of the facility into a far-reaching community events complex by identifying meaningful ways to continue to serve the community, exploring future upgrades to the facilities, and maintaining a focus on the rural heritage and agricultural focus of Boulder County. Learn more.
Morton Heights/Niwot Elementary Safe Routes to School Project Starts June 2022
Boulder County will build a permanent cycle track in Morton Heights around Niwot Elementary that will help create a new safe route to school for students, teachers, and visitors. This will be the first of its kind in Boulder County. Roads in Morton Heights will also be repaved and sidewalks and crossings will be installed. Learn more.
Sugarloaf Road Flood Repair Project Underway
Expect lane closures on Sugarloaf Road and on CO 119/Boulder Canyon Drive from May through October. Uphill cycling restricted to Sugarloaf area residents only. Learn more.
Updated No Parking Guidelines Available for Public Comment
No parking guidelines are currently being updated. A draft of the new guidelines is currently available for public comment. Learn more
120th Street Shoulders Project – Overlook Drive to Dillion Road
Planned reconstruction of 120th Street between Overlook Drive and Dillon Road to widen road for new five-foot shoulders and reduce steep hill grades on corridor. Learn More
Traffic Impact Announcements
Sugarloaf Road Flood Recovery Project May 2 through October – Expect delays on Sugarloaf at CO 119 and on CO 119 between Magnolia and Sugarloaf roads. Project webpage.
South Boulder Road Emergency Concrete Panel Replacements – May 16 through May 27 – Lane closures and cyclist detours on South Boulder Road between Manhattan Drive and Cherryvale Road from 7 a.m., Monday, May 16 through 5 p.m., Friday, May 27. Project webpage
Chip Seal operations starts on northern county road June 7 – Expect daytime, weekday travel delays on various county roads. Learn more and see a map of impacted county road.
Learn about all current roadway projects and their travel impacts on our Closures & Construction webpage.
Boulder County Road Statistics:
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Sustainability Programs
COVID-19 Building Safety
Information Concerning COVID-19
Numerous Boulder County staff are working remotely to help prevent the community spread of COVID-19. The Public Works Department remains fully operational, but staff and public presence at county facilities has been restricted. If you need to reach staff and don’t have direct email or phone information, please call 303-441-3900. You can also use the online report form to let us know about a roadway issue or submit a question to the department. All day-to-day operations will continue to function. Road Maintenance will continue to take care of issues that arise on county roads, including snow removal operations. Information on road construction projects and their travel impacts can be found on the Closures and Construction webpage.
Visitation to Resource Conservation’s Hazardous Materials Management Facility (HMMF) is now by appointment only. Learn more.
If you need to contact the Community Planning & Permitting Department and the Transportation Planning Division, visit their website or call 303-441-3930.
Subdivision Road Maintenance
The Boulder County Comprehensive Plan (BCCP) provides guidance on gravel and paved roads accepted for maintenance in unincorporated Boulder County. The BCCP stipulates that funding for major repairs should be prioritized for the county’s arterial and collector roadways, and that funding of local access roads (aka “subdivision roads”) shall be the responsibility of those served by the road (property owners).
While the county does not conduct major repairs (full roadway resurfacing) on subdivision roads, our Road Maintenance crews still conduct operations on these roads, including: snow removal; pothole patching; clearing of ditches, culverts, and other drainage structures; replacement/repairs of sidewalks; and, roadway crack sealing and patching to maintain public safety.
Department Divisions (hover over image to learn more)
Engineering Division
- Design and construction of all county transportation projects
- Projects include (but are not limited to) – paving, bridge construction, bikeways, shoulders, regional trails, drainage structures
Building Services Division
- Manages all county facilities to ensure the safety of staff and visitors
Fleet Services Division
- Manages the county’s fleet of vehicles and machinery
- Performs maintenance and repairs
- Purchases vehicles and equipment
- Works to improve the fleet’s sustainability
Learn more about Boulder County’s Fleet Electrification goals!
Resource Conservation Division
The Resource Conservation Division strives to lead and promote actions that will help Boulder County reach its goal of Zero Waste or darn near by 2025. Their mission is to provide convenient, cost-effective facilities and programs to help Boulder County reduce waste disposal, protect the environment, and conserve natural resources.
Road Maintenance
- Our Road Maintenance team keeps our roads safe and clean!
- Responsibilities include: culverts, dust control, paving, asphalt and gravel, road grading, road signs, snow plowing and removal, tree and brush removal, and many other tasks
- Roadside mowing and weed control is the responsibility of the county Parks & Open Space Department – 303-678-6200
- Ditches are the responsibility of the ditch owner – Learn more
- Road Maintenance contact – 303-441-3962 or use the online report form