Whatcom County Public Works is deep into its annual chip seal season, and drivers on rural county roads should expect significant delays through Thursday, July 23. Eleven roads across unincorporated Whatcom County are on this week's schedule, with crews working between 6 a.m. and 6 p.m. daily.
Chip sealing is a standard road preservation technique that extends pavement life by spraying liquid asphalt onto the road surface and then covering it with small crushed rock aggregate. The process is faster and less expensive than full repaving, making it the county's primary tool for maintaining hundreds of miles of rural roads. Once the rock sets and is swept, the treated surface can last a decade or more before it needs attention again.
Roads Affected This Week
The following roads are scheduled for chip seal work during the week of Monday, July 20 through Thursday, July 23:
Bowen Road, Clearbrook Road, Garrison Road, Hill Road, Hovel Road, Morgan Road, North Telegraph Road (north of Morgan Road), Nooksack Road, Pangborn Road, Sumas Road, Swanson Road, and Van Buren Road (north of Lindsay Road).
These roads span a wide geographic area, from the Sumas and Nooksack corridors near the Canadian border to roads in the central and western portions of unincorporated Whatcom County. Drivers who regularly use any of these routes for commuting or farm access should plan additional time or identify alternate paths before heading out.
The county is asking motorists to expect travel delays throughout the work window and to use alternate routes whenever possible. Pilot cars and flaggers are typically used to guide traffic through active chip seal zones, but wait times can still stretch to several minutes depending on the length of the treated section and the stage of the work.
How to Track Road Work Through the Season
Whatcom County Public Works updates its chip seal schedule weekly throughout the summer construction season. The most current road list is posted on the Whatcom County website via the County Travel Planner, which maps active road work across the county in near-real time.
Residents can also sign up for email and text alerts to receive automatic notifications about upcoming road work near their address or along specific routes. The alert system is particularly useful for households near roads that are expected to be treated later in the season. The county's chip seal program typically runs from mid-July through September, depending on weather.
This week's schedule follows prior chip seal work in mid-July that covered a different set of county roads. The program moves systematically across the county road network each summer, prioritizing roads based on pavement condition assessments and available funding.
What Chip Seal Means for Drivers
Fresh chip seal surfaces require a brief curing period before they reach full stability. During and immediately after treatment, drivers should reduce speed, avoid sudden braking, and keep distance from other vehicles. Loose rock that has not yet been swept can chip windshields, which is why speed limits are typically reduced in active chip seal zones.
Motorcyclists should take particular care on freshly chip-sealed roads, as the loose aggregate can reduce tire traction, especially in corners. Farm equipment operators and large truck drivers should also check the county's road schedule before routing heavy loads across treated surfaces during the curing window.
Once complete, chip-sealed roads are generally smoother and better sealed against moisture intrusion than they were before treatment, which helps prevent the cracking and pothole formation that accelerates pavement failure on rural roads exposed to Whatcom County's wet winters.
The county has maintained an active chip seal program for many years as a cost-effective alternative to full road reconstruction. With several hundred miles of county-maintained roads in Whatcom County, the summer chip seal season is one of the most visible and impactful road maintenance activities residents encounter each year.
For a current map of active road work and to sign up for road alerts, visit the Whatcom County Public Works page. More background on Whatcom County road infrastructure is available in earlier coverage of regional road closures and detour planning.
