Whatcom County Public Works is wrapping up its 2026 chip seal season this week, with five rural roads scheduled for surface treatment starting Monday, August 3. Drivers on Garrison Road, Nooksack Road, Northwood Road, Slotemaker Road, and Timon Road should expect travel delays throughout the week, with work running between 6:00 a.m. and 6:00 p.m. each day.
This is the final planned chip seal work for the calendar year. County crews have been moving through a series of road segments since early summer, and this week marks the close of that program for 2026.
Which Roads Are Affected
The five roads on this week's schedule span the northern and central portions of Whatcom County:
Garrison Road, north of SR-9, serves as an important connector between Sumas and Lynden-area farms and communities. Nooksack Road runs through the small city of Nooksack and connects surrounding agricultural land. Northwood Road, which will be treated south of the Lynden city limits, is a key route for residents and farm operators in that corridor. Slotemaker Road and Timon Road round out the list, both serving rural areas where chip seal maintenance helps preserve road surface integrity against heavy agricultural and seasonal traffic.
Drivers are urged to use alternate routes whenever possible and to plan for slowdowns if travel on these roads is unavoidable. Work is weather dependent, which means the schedule is subject to change if conditions are not suitable for the application of chip seal material.
What Is Chip Seal and Why Does It Matter
Chip seal is a cost-effective pavement preservation method used widely on rural roads across Washington State. The process involves spraying liquid asphalt onto an existing road surface and then embedding small aggregate chips into the material. Once the chips bond and excess material is swept away, the treated surface gains a rough, durable texture that extends the life of the underlying pavement by years.
For Whatcom County, which maintains hundreds of miles of rural roads, chip seal is a practical alternative to full repaving. It is significantly cheaper per mile than overlay work and can add a decade or more of useful life to roads that might otherwise deteriorate quickly under the weight of farm equipment, logging trucks, and daily commuters.
The tradeoff is a temporary inconvenience for drivers. Fresh chip seal can be loose for a short period after application, causing reduced speeds and, in some cases, chipped windshields if drivers follow too closely behind other vehicles. The county asks drivers to observe posted speed limits and maintain extra following distance in treated zones.
How to Stay Informed About Road Work
Whatcom County Public Works updates a County Travel Planner each week with roads currently scheduled for chip seal and other maintenance. Residents can also sign up for email and text alerts to receive advance notice about upcoming road work in their area, which is particularly useful for people who regularly travel rural county roads and need to plan commutes accordingly.
The notification system is free and allows subscribers to customize which types of alerts they receive. Given that chip seal schedules are weather dependent and can shift on short notice, signing up for alerts is one of the most reliable ways to get real-time updates before heading out.
Drivers who use navigation apps should note that the apps may not always reflect temporary chip seal delays. Checking the County Travel Planner directly before heading out on affected roads is the safest approach this week.
A Summer of Road Maintenance Across the County
This week's work closes out a busy summer maintenance season for Whatcom County roads. Earlier in the season, crews worked on segments including roads near Lynden, in the Nooksack Valley, and along various corridors in the northern part of the county. Chip seal work typically ramps up in July and August when warm, dry weather creates the best conditions for the asphalt emulsion to cure properly.
Whatcom County has also been managing crack sealing and other road preservation work on higher-traffic routes this summer. Earlier this season, Hannegan Road saw single-lane delays for crack sealing work in early August, part of the broader effort to keep the county road network in good condition heading into fall and winter.
Residents with questions about the chip seal schedule or other road maintenance work can contact Whatcom County Public Works directly through the county's main website or by calling the department. Reports of road hazards, including loose chips that remain after the sweep crew has passed, can also be submitted to the department for follow-up.
With this week's work wrapping up the 2026 chip seal season, county roads are expected to return to normal travel conditions before the end of August. Drivers who encounter wet-looking or freshly swept road surfaces should slow down and stay alert until the new surface has fully set.
