Some Boulder County services returned in-person on a limited basis beginning June 1. Most services are still being offered virtually.

Resources are available for those impacted by COVID-19. For help, submit questions or call 720-776-0822 weekdays (9 a.m.-5 p.m.).

Fire Restrictions were updated on June 2 and remain in effect for western Boulder County. View the flyer and map for more details.


The Boulder County Transportation Department has turned over the responsibility of the Ditch and Reservoir Directory to the St. Vrain and Left Hand Water Conservancy District. They will be gathering the updates and publishing the Ditch and Reservoir Directory.

Ditch & Reservoir Directory

  • Boulder County Ditch Map
    • DISCLAIMER – This data has been developed by Boulder County and may also include data from third-party sources, Boulder County makes no warranties, representations, or guarantees, either expressed or implied, as to the completeness, accuracy, or correctness of the data, nor accepts or assumes any liability arising from or for any incorrect, incomplete, or misleading data provided pursuant to the use of this data. There are no warranties and/or representations, either expressed or implied, of merchantability or fitness of the data for a particular purpose or use.
  • The St. Vrain and Left Hand Water Conservation District produces a Ditch and Reservoir Directory for all privately owned & maintained ditches in the county. Look for the link underneath the “Basin Contact Information and Ditch Directory” header.

Questions, corrections contact the St Vrain and Left Hand Water Conservancy District at 303-772-4060 or email

Contact Us

Transportation Department

Submit a question


2525 13th Street
Boulder, CO 80304

Map & Directions

Hours: 8 a.m. - 4:30 p.m. M-F

Mailing Address

P.O. Box 471
Boulder, CO 80306