Summer Road Preservation

To preserve the surface of county roads, Public Works performs ongoing road surface preservation treatments. The county uses several different methods to preserve roads and to protect the public’s investment in its transportation infrastructure.

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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.

Dates (Subject to Change, due to weather, equipment malfunctions, or other unforeseen circumstances)

Slurry Seals Dates: Summer 2026

Cape Seals Dates: No Cape Seals Scheduled for 2026

2026 Proposed Preservation Treatment Locations

Clark County provides an online interactive map so residents can get a general idea for where the 2026 Preservation Treatment locations are.

View larger map

Public Works will notify neighborhoods affected by the 2026 Summer Road Preservation project prior to construction. Affected neighbors will receive a Public Works “Heads Up” notice in the mail.

2026-2027 Vegetation mailer

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)

Project background

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.

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.

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 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.

2026 Chip Seal List
		From	To
6-Jul	WASH	SE Sunset View Rd	East .67 mi
6-Jul	WASH	SE 20th ST	Washougal CL
7-Jul	WASH	SE 20 St	mp 1.01
	WASH	SE 352 Av	SE 357 Av
	WASH	SE 357 Av	SE 377 Av
	WASH	SE 377 Av	SE 10 St
	WASH	SE 380 Av	East end
	WASH	SE 380 Av	East end
8-Jul	WASH	Washougal River Rd	.36 mi N NE Borin Rd
8-Jul	WASH	Cougar Creek Br (Bridge 1409)	NE Hughes Rd
9-Jul	WASH	Washougal River Rd	NE 9 St
9-Jul	WASH	NE 9 St	NE Blair Rd
10-Jul	WASH	NE 312 Av	.08 mi N of NE 322 Av
	WASH	NE 9 St	.75 mi N Ammeter
	WASH	NE 322 Av	North end
18-Jun	FH	NE 232 Av	East .53 mi
13-Jul	MAB	NE 72 Av	mp 3.78
	MAB	NE 72 Av	West .35 mi
	MAB	NE 159 St	North end
	MAB	NE 131 St	mp 1.26
14-Jul	FH	SR-503/149 St	NE 159 St
	FH	NE 159 St	54 ft S of NE 179 St Centerline
	FH	NE 182 Av	West .36 mi
15-Jul	FH	NE 159 St	NE 139 St
	FH	NE 169 St	0.13 mi N of NE 174 St
	FH	NE 212 Av	NE 217 Av
	FH	NE 217 Av	mp .55
	FH	NE 159 St	NE 169 St
16-Jul	FH	NE 189 St/Erickson Rd	NE 169 St
	FH	NE 232 Av	0.55 SE of NE 189 St/Westerholm Rd
	FH	NE 189 St	NE 199 St
20-Jul	FH	NE 209 St	mp .17
	FH	mp .17	South end
	FH	NE 242 Av	East .53 mi
	FH	0.03 mi E of NE 242 Av/Olson Rd	NE 258 Av (PVT)
	FH	NE 219 St	NE 209 St
	FH	NE 209 St	NE 244 Av
	FH	NE 244 Av	NE 249 Av
	FH	NE Osman Rd	NE Berry Rd
	FH	NE Berry Rd	NE 219 St
21-Jul	FH	NE 182 Av	Basket Flat Rd
	FH	NE 197 Av	Lucia Falls Rd
	FH	NE 279 St	South to end
22-Jul	FH	NE 219 St	South end
	FH	NE 119 St	0.93 mi N of NE 119 St
	FH	NE 144 St	.37 mi N NE 159 St
23-Jul	FH	.142 N of NE 119 St	NE 159 St
23-Jul	FH	NE 152 Av	East .24 mi

Similar to the Summer Road Preservation projects, the Hot Mix Asphalt overlays is a surface treatment for structural reinforcement on arterial and collector roads in both urban and rural areas,. Surface defects and irregularities are repaired prior to adding a new layer of hot mix asphalt. View the project page for more information.

2026 HMA impact notice (PDF)

Similar to Hot Mix Asphalt overlays, a thin lift is a surface treatment of asphalt that is applied to subdivisions or access roads that have surface irregularities but remain structurally sound. This paving evens the road surface and corrects some drainage issues. It provides a more modest treatment on less heavily used roads than a standard overlay.

In preparation for summer road work, residents sometimes need to prune their vegetation so construction vehicles can get close to the curb.

In addition, vegetation needs to be trimmed to improve traffic visibility and remove sidewalk or pedestrian obstructions.

Homeowners are responsible for pruning and maintaining their vegetation, including debris disposal.

All low-hanging material needs to be trimmed to provide 14 feet of vertical clearance from the top of the curb and 8 feet of clearance from the full width of the sidewalk.

Bushes, shrubs and other low vegetation also need to be trimmed so they don’t hang into the street.

If residents do not trim their vegetation, county road crews will cut it. This work will be done for free, but it will not be done to a landscape quality desired by many residents.

For this reason, residents are encouraged to trim their vegetation.