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Rebuilding SR 530

Status - construction

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August 2014

  • Traffic will be detoured the first full weekend in September. Dates and times can be found here.
  • Delays of up to 10 minutes remain possible at times between 6 a.m. and 6 p.m. due to intermittent flagging. 
  • SR 530 opened to two-way traffic with a 25 mph speed limit around 5 p.m. Friday, June 20, 2014.
  • SR 530 reopened on May 31 to alternating single-lane traffic.
  • WSDOT awarded the SR 530 reconstruction contract to Guy F. Atkinson Construction for $20.57 million. The Federal Highway Administration emergency relief funds will cover the entire cost of the reconstruction project.
  • Substantial completion of the new alignment is expected in October.

Why is WSDOT rebuilding SR 530?
Both directions of SR 530 in North Snohomish County from Whitman Road (milepost 36) to 310th Street Northeast (milepost 39) were blocked following a massive landslide that occurred on Saturday, March 22. Debris from the slide damaged SR 530 and blocked the north fork of the Stillaguamish River.

The end result
Due to the risk resulting from the landslide and the geographic changes to the Stillaguamish River North Fork, the roadway must be elevated. The design/build contract was awarded to Guy F. Atkinson Construction. Funding for this portion will be paid by the Federal Highway Administration.

Project timeline
Substantial completion of an elevated SR 530 through the slide area is required by early October.

Contractor crews plan to rebuild SR 530 in four major stages:

COMPLETED - Stage 1: Repair, pave and stripe the existing roadway so that it can open temporarily to two-way traffic within the first few weeks of the project. A visualization (pdf, 435kb) of the work shows what drivers can expect in stage 1 of the project.

COMPLETED - Stage 2: Rebuild the east section of the roadway next to the existing roadway. This section will stand about 5 feet above the current roadway for flood protection reasons. A visualization (pdf, 435kb) of the work shows what drivers can expect in stage 2 of the project.

Stage 3: Rebuild the roadway through the slide area and the west side of the roadway next to the existing SR 530. The section west of the slide area will stand about 15-20 feet above the existing roadway. Open all of the new roadway to traffic by early October. A visualization (pdf, 435kb) of the work shows what drivers can expect in stage 3 of the project.

Stage 4: Finish other key tasks off the roadway, including landscaping, stream restoration and demolition of the existing roadway, after the new SR 530 opens to traffic. A visualization (pdf, 435kb) of the final work for the project shows what drivers can expect during stage 4.

No restrictions currently in place on SR 530
The speed limit is 25 mph and there are no restrictions for height and size of vehicles at this time.

Traffic will be detoured Local travelers may still need to use the Seattle City Light access road at times until the elevated portion of SR 530 is reopened permanently. 

Schedule of detours
The first set of detours to the Seattle City Light access road are currently scheduled for:

  • 9 p.m. Friday, Sept. 5 to 4 a.m. Monday, Sept. 8.
  • 9 p.m. Tuesday, Sept. 9 to 4 a.m. Thursday, Sept. 11.

During those times, traffic will return on a one-way, piloted basis to a neighboring single-lane gravel road, known as the Seattle City Light access road. Pilot cars will escort westbound traffic at the top of the hour and eastbound traffic on the half hour, around the clock. Drivers are encouraged to arrive early.

The detours are subject to cancellation based on construction progress. During these detours, crews will install two new culverts under the roadway for improved fish passage and complete paving, guardrail and restriping work to connect the new, elevated eastern section of the roadway with the existing SR 530.

At all other times traffic will continue to operate on a two-way basis on the existing SR 530. Drivers should continue to add about 10 minutes to their trips, as they will experience intermittent flagging 6 a.m. to 6 p.m. Monday through Saturday to allow safe movement of construction vehicles and equipment.

Upcoming community meetings 

When: 7 to 9 p.m. Monday, Sept. 8
Where: Darrington Community Center Dining Hall, 570 Sauk Ave., Darrington, WA 98241

When: 6 to 8 p.m. Wednesday, Sept. 10
Where: Stillaguamish Senior Center, 18308 Smokey Point Blvd., Arlington, WA 98223

When: 7 to 9 p.m., Thursday, Sept. 11
Where: Oso Community Chapel, 22318 Washington 530, Arlington, WA 98223

If you cannot attend one of these meetings, please send questions and comments to

Notes from the first (xls 53.7 kb), second (xls 18.1 kb) and third (xls 17 kb) rounds of family and community meetings are now available.

Financial Information
The SR 530 reconstruction project is funded with $28.1 million of Federal Emergency Relief funding.

How can I get more information?

Travis Phelps
WSDOT Communications
Phone: (206) 440-4698

Harmony Haveman Weinberg
WSDOT Communications
Phone: (206) 440-4475

Or sign up to be on the SR 530 email list to get the latest updates.

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