Preservation Surface Treatment Projects
What is Pavement Preservation?
There are a variety of preservation (preventive) treatments used to extend the life of streets at a much lower cost than a standard asphalt overlay. The type selected for a particular streets depends upon several factors, such as current surface condition, carrying capacity and travel use Pavement Management’s preservation (preventive street treatment) projects alternate each year between the east and west sides of Vancouver. The focus for 2023 is on neighborhood areas west of Interstate 205.
2023 Preservation Treatments
For 2023, almost 16 miles of streets in west Vancouver will see some type of preservation used to protect and extend the life of the street. Some of those street segments include Kauffman Avenue, East Reserve Street, Northeast Ross/54th Street, Northeast 51st Street, Northeast 66th Avenue, Northeast Vancouver Mall Drive/Loop, Saint Helens Avenue, Southeast Ellsworth Road and Lieser Road. Advance tree trimming, curb ramp upgrades and crack sealing/repairs occurred where needed. Actual pavement work typically takes place between July and September.
Here are the neighborhoods where preservation street work is planned.
- Carter Park
- West Minnehaha
- Rose Village
- Central Park
- Hudson’s Bay
- Van Mall
- Vancouver Heights
- Ellsworth Springs
- Old Evergreen Highway
Pavement Map: View the current 2023 Pavement Management Program map. Map is subject to changes.
Reference Guide: View a handy reference guide with tips for upcoming pavement work. This guide has information about parking restrictions, watering restrictions and potential weather-related delays, along with general dos, don’ts and other tips.
Curb Ramp Improvements Prior to Surface Treatments
As a precursor to the surface treatment work, crews often install new intersection curb ramps or retrofit existing curb ramps at various, identified intersection locations to meet compliance requirements of the Americans with Disabilities Act. Click here to learn more about the City’s annual curb ramp program.
What to Expect Prior to Street Work?
In most cases, residences and businesses fronting impacted streets receive door hanger notices in advance of pavement street work. Within construction zones, drivers are asked to be prepared for delays, watch for traffic changes, proceed slowly, and be alert to construction workers, bicyclists, pedestrians and other motorists. Regardless of the type, all pavement applications are highly weather dependent.
Construction hours are typically from 7 a.m. to 5 p.m., Monday through Saturday, though work may continue as late as 8 p.m. if needed. All paving applications are highly weather dependent. In case of rain, work must be postponed and rescheduled.
Types of Pavement Preservation:
Microsurfacing begins as a coarse liquid application of dense-grade aggregate, asphalt emulsion, water and mineral fillers. The quick-setting emulsion allows traffic to begin using the new surface in a short time, as little as an hour depending upon conditions. As the product cures, the surface becomes smoother. The finished sealant forms a thin shell over the street’s existing asphalt surface, extending the life of the underlying pavement. Microsurfacing applications are generally applied on arterial and higher volume streets.
Slurry Seal is a mixture of fine rock, asphalt, and water placed on the pavement about ¼-inch thick to protect the surface from sun and rain. Slurry seal applications are generally applied on lower volume local and residential streets.
Chip Seal is a layer of sprayed emulsified asphalt and then a layer of new rock. A chip seal treatment typically extends the life of a road by seven to 10 years and provides a new sealed surface at a fraction of the cost of a standard asphalt overlay.
Cape Seal is a surface treatment that begins with a chip seal and then combines a final slurry seal, or even a microsurface, application. This treatment can greatly extend the life of the roadway.
Chip and Fog Seal treatment begins with a chip seal and then is finished up with a fog seal. Chip seal methods can include an asphalt rubberized chip seal or a ¼-inch chip seal, both helping increase durability, decrease loose chips and improve smoothness of the street. The type of chip seal method used depends on the amount of current traffic on the roadway.
Asphalt Rubber Chip Seal is a treatment that involves an asphalt rubber binder being applied to the street, then topped with a layer of chipped rock. Crews then apply a fog seal – a thin layer of liquid asphalt that coats and preserves the pavement to extend its life – to the surface.
Bonded Wearing Course is an open-graded, thin hot-mix asphalt mixture applied over a thick polymer asphalt emulsion membrane. The high binder content seals the underlying road, protecting it from water infiltration and slowing the aging process. Bonded wearing courses have been used throughout the country and were used in Vancouver for the first time in 2018.
Construction questions during summer street work:
Public Works Construction Services: 360-487-7750
7:30 a.m. to 4:30 p.m., Monday through Friday
Pavement Reference Guide