County Roadway Chip Seal Program

Annual chip sealing operations have been postponed until summer 2022.


Chip sealing work consists of applying asphalt to a road surface followed by a layer of one-quarter inch chips that essentially create a new layer on top of the road. A week after the chips are applied, crews return to the area to apply a sealant designed to help the chips adhere to the road. Finally, the sealant is followed by roadway striping operations. See to the right to view pictures of the process.

Chip seal operations in 2022 will occur in the following order on county roads:

  • Jay Road from 63rd to 75th street
  • Lookout Road from 75th to 115th street
  • Summerset Drive and Longview Road in Niwot
  • 73rd/75th Street from Niwot Road to CO 66

Work will take place between 7 a.m. and 5 p.m., Monday through Thursday. Expect single-lane closures and reduced speeds. Cyclists will need to use the general traffic lane in work zones.

Chip sealing operations are part of the county’s primary network roadway rehabilitation plan. The process is intended to extend the lifespan of the roadway and postpone larger reconstruction efforts that would require more expensive work and longer travel restrictions. Primary network county roads are typically chip sealed every six to eight years.

Chip sealing takes place over the summer when weather is most favorable.

Check the closures and constructions page for updates about current road projects.

For more information on the work, contact Andrew Barth, at or 303-441-1032.

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Boulder, CO 80304

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Boulder, CO 80306