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SR 164 - High Point St. to Watson St. N Paving and Signalization

Project map of the work area.
Click to enlarge

WSDOT crews measure how steep the existing pedestrian ramp is at the corner of Griffin Ave. (SR 164) and Pioneer Street.

See more photos on WSDOT's Flickr page.

Concrete sections of the old highway peek out from beneath cracked asphalt on SR 164. 

Here's the intersection of Watson Street and SR 410 (Roosevelt Avenue), looking south. WSDOT will install a traffic signal in this location.


January 2015

  • The new traffic signal at the intersection of SR 410 and Watson Street is now operational. 
  • Check the King County construction update report for all closures related to this project.
  • Sign up to receive email updates about this project and other South King County topics.

Decades of use, combined with abandoned railroad tracks and a section of buried 100-year-old broken concrete, have caused the pavement along 1.5 miles of State Route 164 (Griffin Avenue) in Enumclaw to crack and separate. This summer, crews will repair the state route and repave the roadway for drivers. 

In addition to paving, WSDOT also will upgrade most of the pedestrian sidewalk ramps on the route, and install a new traffic signal at the intersection of SR 410 and Watson Street North.

Why is WSDOT repaving SR 164 through Enumclaw, upgrading the pedestrian ramps and installing a new traffic signal?


  • This section of roadway was last paved in 1998. The pavement is broken and cracked in many areas.
  • Cracked and rutted pavement can cause vehicle damage if not repaired or replaced. 
  • Over the years, WSDOT maintenance crews have sealed the large cracks and patched potholes to help hold the roadway together. Now it is time for a longer-lasting fix.

Pedestrian ramps

  • The current pedestrian ramps were last upgraded in the late 1980s and 90s. Since then, guidelines set by the American Disabilities Act (ADA) require a more gradual, less steep ramp from the sidewalk to the street.
New traffic signal at SR 410 and Watson Street interchange
  • Traffic studies show a steady increase in vehicle and pedestrian traffic in this area since 2009.
  • The intersection has now reached the point where a traffic signal with dedicated turn arrows onto SR 410 is needed to preserve safety.

The End Result
To extend the life of the highway and smooth the roadway for drivers, we will:

  • Grind out all of the existing asphalt.
  • Remove buried concrete panels and abandoned railroad tracks.
  • Rebuild the subgrade where needed.
  • Repave both directions between High Point Street and SR 410.
In addition to repaving the roadway, WSDOT will:
  • Upgrade 90 pedestrian ramps to comply with 2014 ADA standards.
  • Install crosswalks and a traffic signal at the junction of SR 410 and Watson Street.

Project Benefits

  • A smoother driving surface
  • Reduced maintenance costs
  • Improved pedestrian and driver safety

What is the project timeline?

  • We advertised this project for competitive bidding in February 2014.
  • We awarded this project to ICON Materials on March 17, 2014.
  • Construction is scheduled to began May 5, 2014.
  • September 2014 - Expected completion

Financial Information

Financial Data for PIN 116409C, 141011E
Funding Source Amount ($ in thousands)
2003 Gas Tax (Nickel Funding) $0
2005 Gas Tax (TPA) $0
Pre-Existing Funds (PEF) $3,454
Total $3,454

Project signage will reflect the cost of construction engineering, project bid award and sales tax.

Total project cost: $3,859,495

How can I get more information?
Hien Trinh
WSDOT Project Engineer

Kris Olsen
WSDOT communications

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