Summer Road Preservation

Every summer Public Works performs annual road surface treatments. The county uses several different methods to preserve roads and to protect the public’s investment in its transportation infrastructure.

This road work does disrupt drivers and, in some cases, requires roads to be temporarily closed.

When a street is closed for a surface treatment, construction workers will allow police cars, fire engines and ambulances responding to emergencies to drive through the work zone.

Have questions about the door hanger you received? Click on our FAQ’s to find out more.

2022 Preservation Treatment Locations​

Dates (subject to change, due to weather, equipment malfunctions, or other unforeseen circumstances)
Slurry Seals       Summer 2022, Exact Dates TBD  

Daily Schedule  • Slurry (TBD) Status: Upcoming
Cape Seals        Summer 2022, Exact Dates TBD  
Daily Schedule •  AR Chip  Step #1 (TBD) Status: Upcoming •  Slurry, Step #2 (TBD) Status: Upcoming 

In some cases, federal regulations require Clark County to build or upgrade sidewalk curb ramps so they are accessible to wheelchair users and other people with disabilities.
Sidewalk curb ramps and the Americans with Disabilities Act (PDF)

Slurry Seal

Slurry 2020

This surface treatment is applied to access and subdivision roads in urban areas to prevent moisture from infiltrating a road's subgrade.

These roads are structurally sound and do not need reinforcement.

Emulsified oil and finely crushed aggregate are premixed on a truck and then applied to the road surface.

This treatment requires closing the road for one day to allow curing before the road can reopen to traffic.

Door hangers will be used to alert residents before work begins on their street. Residents should watch for a door hanger providing seven days notice, followed by a second door hanger 24-48 hours before application.

Please note that some maps also show rubberized asphalt cape seals that will be done the same area. Public Works is providing this extra information so residents can be aware of related work being done in their area.

Cape Seal

The treatment consists of two steps. In the first step, an asphalt rubber binder, consisting of paving asphalt, oil and crumb rubber from ground-up used tires and natural rubber, is applied to the road, followed by a layer of crushed rock. The rock, which is pre-coated with an asphalt binder, is pressed into the asphalt-oil-rubber mix using rollers.

The second step, typically done 1-2 weeks later, is applying a slurry seal to further preserve the surface. This is a one-day process that requires closing the road.

Door hangers will be used to alert residents before work begins on their street. Residents should watch for a door hanger providing seven days notice, followed by a second door hanger 24-48 hours before application.

Please note that some maps also show slurry seals that will be done the same area. Public Works is providing this extra information so residents can be aware of related work being done in their area.

Chip Seal

Chip sealing a road in north Clark County.

Chip seal is used to help seal the surface and prevent moisture from damaging roads. Each area is completed within 1 - 3 days.

Roads will not be closed, but you may experience temporary traffic delays. Watch for loose gravel and fresh oil signs and please drive slowly through work zones.

Micro Seal

Micro seal is similar to a slurry seal, only that it uses larger pieces of rock. Cement also can be added to the mixture. A micro seal dries faster than a slurry seal and is used on multilane roads, which allows traffic to pass on one lane while the other is being treated.

To further ease traffic disruptions, sand can be shoveled onto intersections so vehicles can drive over the treated surface only minutes after it has been applied.

More information

2022 Chip Seal Heads Up (PDF)

2022 Vegetation Mailer 

Public Works Customer Service
Clark County Public Works
564.397.2446 
pubwks.cservice@clark.wa.gov