SR 530 - Mt. Baker Area BST - 2018

Project news

  • WSDOT awarded this project to Granite Construction.
  • This project will resurface nearly 40 miles of road, on seven different highways, in four different Northwest Washington counties.
  • Sign up for email updates on this project.

This resurfacing project will rehabilitate the existing pavement and preserve nearly 40 miles of roadway,
on seven different highways in Snohomish, Island, Skagit and Whatcom counties.

Why is WSDOT doing this work?
Resurfacing the highways preserves the integrity and life
of the roadway. This project, which involves pavement repair, sealing cracks and putting down a new top coat over the highway, helps prevent damage which can lead to costly emergency repairs.

Which stretches of highway will be resurfaced?
Crews will work on nearly 40 miles of highway during this project. Those stretches include:

Snohomish County

  • SR 530 in Arlington from the South Fork Stillaguamish River Bridge to Lake Cavanaugh Road near Oso.
  • SR 531 in Marysville from near Lake Goodwin and Wenberg State Park to 11th Avenue Northeast near Smokey Point.

Island County

  • SR 20 in Coupeville from the ferry terminal to SR 525/East Race Road.

Skagit County

  • SR 9 from the south end of Big Lake to SR 20 in Sedro-Woolley.
  • SR 11/Chuckanut Drive south of Oyster Dome from West Bow Hill Road to south of Oyster Creek Lane.
  • SR 20/North Cascades east of the North Cascades Visitor Center near Newhalem.

Whatcom County

  • SR 11/Chuckanut Drive in Bellingham from Teddy Bear Cove to Fairhaven.
  • SR 539/Guide Meridian Road from Badger Road to H Street.
  • SR 542/Mount Baker Highway from the Nooksack River to the Artist Point gate near Mount Baker Ski Area.

What does this work involve?
WSDOT contractor crews will grind down some sections of the road, dig into deep layers and remove all areas where potholes are or are beginning to form. Crews will then seal cracks along the road to help keep water out. Once repair work is done, crews will apply coats of warm oil and rock to the existing pavement to create a new surface. This is called a Bituminous Surface Treatment (BST) which helps preserve the highway between paving projects. Crews will finish the project by putting down new reflectors and striping.

What should travelers expect?
This resurfacing work requires hot and dry conditions. In Western Washington, that means most of this work needs to be done during the day. People driving and biking should plan for:

  • Lengthy delays through the work zone.
  • Wet materials along each stretch.
  • Some loose material in the area around-the-clock until the project is complete.


The End Result
When resurfacing work is complete, people driving on these stretches will have a new preserved surface that will help keep all travelers moving safely and efficiently for years to come.

Project Benefits
This project will preserve the highway and help prevent costly and unexpected emergency repairs. Resurfacing:

  • Preserves the integrity and life of deteriorating highways.
  • Is a cost-effective way to preserve the highway.
  • Costs about one third of the price of asphalt repaving.


What is the project timeline?
December 2017: Project advertised for competitive bidding.
Spring 2018: Project begins.
Late summer 2018: Project complete.

Financial Information
The current total estimated project cost is $9.6 million.


How can I get more information?

Andrea E. Petrich

Shane Spahr
Project Engineer