Flood Impacts to Transportation Infrastructure

The flood of September 2013 has dramatically impacted travel along county roads and highways, limiting access to residential areas in the foothills and mountains. The following links will help you navigate Boulder County roads:

See Also:

Boulder County Transportation works to ensure safe and efficient public transportation, both within Boulder County and along regional transportation corridors. The Transportation Department is made up of six divisions: Administration, Engineering, Fleet, Multi-Modal (Bus, Bike, Walk), Planning and Road Maintenance.

Road Closures & Construction

Visit the  Closures & Construction webpage to learn about impacts to motorists and cyclists due to current and future projects.

Meetings & Public Open Houses

Current and upcoming meetings and public open house information is available on the Roads & Transportation page or by viewing the event calendar.

Bike, Transit and Mobility

Boulder County offers some amazing programs and services that help people get around the county using bikes and buses. Learn more about how you can drive less on the Bike, Transit and Mobility website.

Transportation Capital Improvement Program (CIP)

The Boulder County Transportation Capital Improvement Program (CIP) contains all of the planned transportation improvements for the County, including new or refurbished roads, bridges, pathways, drainage improvements and regional trails that use transportation capital funds. Review the 2016 CIP memo to the Board of County Commissioners (April 2016)


Engineering and Planning Divisions

303-441-4594 (fax)

Mailing Address

PO Box 471
Boulder, CO 80306


2525 13th St.
Suite 203
Map and directions
8 a.m.-4:30 p.m. M-F

Road Maintenance Division

303-682-6714 (fax)


5201 St. Vrain Road,
Building 5
Map and directions

Hours: Mid-April to October
6 a.m.-4:30 p.m. M-Th

October to Mid-April
7 a.m.-3:30 p.m. M-F