- 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
Valmont Road and 61st Street Safety Improvement Project –
Public Works is currently working on concept-level designs for safety improvements at the intersection of Valmont Road and 61st Street. Visit the Visit the project website to learn more.
North 95th Street (Valmont to Lookout) Reconstruction & Resiliency Project – 2023/2024 construction
Boulder County Public Works is planning to reconstruct North 95th Street between Valmont Road and Lookout Road along with improvements to protect both the road and surrounding open space properties from damage during flood events. This is the final segment of a multi-year effort to reconstruct North 95th Street between Lafayette and Longmont. Learn more.
East County Line Road – Quicksilver to Pike – Widening Project
Planned reconstruction of East County Line Road between Quicksilver and Pike roads to add shoulder width, replace a drainage structure, and build a roundabout at Pike Road. Learn More
North 71st Street – Winchester to CO 52 – Roadway now open
Reconstruction of N. 71st Street, between CO 52 and Winchester Circle is planned for 2023. Learn more.
Traffic Impact Announcements
N. 51st Street/N. 55th Street CLOSURE for Culvert Replacement – Road will close for this work – Learn more
Hygiene Road culvert replacement requires full road closures between US 36 and N. 59th Street starting Aug. 28 through December – A failing culvert that carries water into Foothills Reservoir at Bashor Farms will be replaced. This work will require a full closure of Hygiene Road between N. 59th Street and US 36 for all travelers starting in Aug. 28 through December.
Learn about all current roadway projects and their travel impacts on our Closures & Construction webpage.
Boulder County Road Statistics:
COVID-19 Building Safety
Information Concerning COVID-19
The Public Works Department remains fully operational, but staff and public presence at county facilities has been restricted to 8 a.m. to 4:30 p.m. on Tuesdays and Thursday. 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.
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)
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.
- 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