Drivers in rural Whatcom County should plan for delays starting Monday, August 3, as the county's Public Works department begins the final week of its 2026 chip seal program. Work is scheduled to run through Thursday, August 6, affecting five roads in the county. Delays are expected between 6 a.m. and 6 p.m. daily on each affected stretch. The announcement was posted July 29 by Whatcom County Public Works as part of its regular Road Closures and Restrictions news feed.
Which Roads Are Affected
The five roads scheduled for chip seal treatment during the week of August 3 are: Garrison Road north of State Route 9, Nooksack Road, Northwood Road south of the Lynden city limits, Slotemaker Road, and Timon Road. These roads are spread across the rural heart of Whatcom County, covering areas north of Bellingham between the Nooksack Valley and the Lynden area. Together they represent a cross-section of the county's agricultural and residential road network, the kind of lightly traveled rural pavement that benefits most from preservation treatments rather than full reconstruction.
Residents who live along these roads or who regularly use them for commuting, farm access, or school runs should plan alternate routes for the week. Whatcom County Public Works asks that drivers use alternate routes whenever possible during the 6 a.m. to 6 p.m. work window. Anyone who parks along the right-of-way on these roads should move their vehicle out of the public right-of-way before 6 a.m. on days when chip seal work is scheduled. Vehicles left in the right-of-way can obstruct equipment and slow down the application process, potentially extending the period of disruption for everyone else on the road.
An updated road list is published weekly on the county's Road Closures and Restrictions webpage, and roads scheduled for chip seal are also listed on the County Travel Planner. Both tools are accessible through the Whatcom County website. The schedule is weather-dependent and subject to change if rain or other conditions affect the chip seal process. In the Pacific Northwest, even a mid-summer rain event can push the schedule back a day or more, so checking the online planner the morning of travel is a good habit for anyone on an affected route this week.
What Chip Sealing Is and Why It Matters
Chip sealing is one of the most cost-effective pavement preservation techniques available to county road crews. The process involves spreading a layer of liquid asphalt binder on an existing road surface, then covering it with small aggregate chips. The chips are then compacted into the binder by a roller, and a sweeper returns later to clean up loose material left on the surface. The result is a refreshed road surface that resists cracking and water intrusion without the cost of a full repaving job.
For rural county roads that carry moderate traffic volumes, chip sealing can extend pavement life by a decade or more at a fraction of the cost of an asphalt overlay. A conventional asphalt overlay requires milling or leveling the existing surface, laying several inches of new hot-mix asphalt, and compacting it with heavy rollers. Chip sealing requires far less material and equipment time, which is why it is the treatment of choice for lower-volume roads where structural integrity is sound but the surface has begun to oxidize, crack, or lose its weatherproofing. Whatcom County Public Works runs an annual chip seal program each summer when weather conditions are dry and warm enough to allow the binder to cure properly, typically targeting a window between early July and early August when the region's famously wet weather cooperates.
The program typically begins in early July and works through a list of priority roads before concluding in early August, following an assessment of which surfaces are approaching the end of their useful life without intervention. This week's work represents the final stretch of the 2026 program. Earlier rounds of chip seal work in Whatcom County this summer covered eight roads during the week of July 27, and the program has been operating county-wide since it launched on July 6. Completing the program before mid-August ensures that treated surfaces have sufficient warm weather for the binder to fully cure and bond before autumn rains arrive.
Safety Tips for Drivers, Cyclists, and Motorcyclists
Fresh chip seal surfaces require extra caution from everyone using the road. Loose gravel on the roadway is common during and immediately after the chip seal process, before crews return to sweep the remaining aggregate. That loose material can create a skidding hazard, particularly for motorcyclists and bicyclists, whose smaller tire contact patches and two-wheeled balance make loose surface material significantly more dangerous than it is for passenger cars. The county advises cyclists and motorcyclists to use extra caution on any freshly chip-sealed road and to use alternate routes during the active work period if possible.
Drivers following chip seal equipment or traveling on roads that have recently been treated should reduce their speed and leave extra following distance from the vehicle ahead. Rocks kicked up by passing vehicles can crack windshields, and that risk rises sharply with vehicle speed. Reducing speed to 25 miles per hour or less on freshly treated sections cuts both the distance chips travel through the air and the force with which they strike following vehicles. Windshield damage claims are a common side effect of chip seal season, and the simplest way to avoid them is to slow down.
After chip sealing is complete on each road, county crews will return in the following week or weeks to sweep the remaining loose gravel and repaint lane markings. The sweeping pass collects aggregate that was not fully embedded in the binder and removes it from the travel lanes, restoring the road to a cleaner and safer condition. Those sweeping and striping operations are also weather-dependent and may shift if conditions change. Drivers should expect that a newly chip-sealed road will remain somewhat gritty underfoot for several days until the sweep crew completes its work.
Residents with questions about the chip seal schedule or specific road conditions can contact the Whatcom County Public Works Maintenance and Operations Division at 360-778-6400. Road condition information and updated closure notices are available any time on the Whatcom County website. For residents in the Lynden and Nooksack Valley areas especially, checking the county travel planner before heading out this week will save time and frustration on familiar routes that may look and feel quite different by midweek once the aggregate has been applied. Farm operators moving heavy equipment along these corridors should also be aware that chip seal surfaces can be disrupted by slow-moving tracked or steel-wheeled machinery, and coordinating timing with Public Works can help avoid damage to newly treated sections.
