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East County Line Road - Zlaten Drive to St. Vrain Creek

Project Background

The Public Works Department, in partnership with the City of Longmont, is planning to widen East County Line Road from Zlaten Drive/Great Western Drive to St. Vrain Creek (see a map of the project area).

The widening will:

  • Add seven-foot wide paved shoulders to a short section of East County Line Road to provide continuous paved shoulders from Longmont down to Quicksilver Road and the city’s St. Vrain Trailhead.
  • Improve road geometry to eliminate an offset lane alignment on southbound East County Line Road.
  • View project exhibits


Construction is anticipated to begin in the summer of 2023 and will last through the end of the year.

Project Contact

  • Andrew Barth, Public Works Communications, email or 303-441-1032

Contact Us

Public Works Department (formerly Transportation)

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2525 13th Street
Boulder, CO 80304

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Hours: Building Open 8 a.m. - 4:30 p.m. Tuesdays & Thursdays

Mailing Address

P.O. Box 471
Boulder, CO 80306