166th Avenue E/SR 410 Interchange

The Challenge

The State Route 410/166th Avenue interchange is a congested mess. Originally built in the early 1970s, this interchange serves regional commuters cutting through Sumner to avoid the SR 167 congestion and thousands of vehicles trying to access busy commercial areas. Beyond the usual congestion found at so many regional interchanges/routes, the issue here is a completely unsafe intersection control situation for drivers, as well as a complete lack of pedestrian facilities and a small, buried culvert that prevents fish from continuing to access habitat in Salmon Creek.

Solutions

  • Widen the remaining two-lane stretch of 166th Avenue to eliminate the bottleneck just north of the existing SR410 interchange.
  • Design and construct a signal at the existing stop-controlled SR410 Westbound on/off ramp.
  • Replace an existing undersized culvert with a new fish-passage culvert to carry Salmon Creek across the existing intersection at 166th Avenue and 64th Street. Daylight a portion of stream channel to improve salmon habitat.
  • Interconnect existing traffic signals together and with new signal to reduce congestion and improve safety.



The Challenge

The State Route 410/166th Avenue interchange is a congested mess. Originally built in the early 1970s, this interchange serves regional commuters cutting through Sumner to avoid the SR 167 congestion and thousands of vehicles trying to access busy commercial areas. Beyond the usual congestion found at so many regional interchanges/routes, the issue here is a completely unsafe intersection control situation for drivers, as well as a complete lack of pedestrian facilities and a small, buried culvert that prevents fish from continuing to access habitat in Salmon Creek.

Solutions

  • Widen the remaining two-lane stretch of 166th Avenue to eliminate the bottleneck just north of the existing SR410 interchange.
  • Design and construct a signal at the existing stop-controlled SR410 Westbound on/off ramp.
  • Replace an existing undersized culvert with a new fish-passage culvert to carry Salmon Creek across the existing intersection at 166th Avenue and 64th Street. Daylight a portion of stream channel to improve salmon habitat.
  • Interconnect existing traffic signals together and with new signal to reduce congestion and improve safety.



  • Interchange Story on Q13

    4 months ago

    Q13 features interchange issues. While you generally do not like to hear your city's name combined with the words "traffic nightmare," hopefully such coverage helps lead to funding and solutions for this State-owned interchange.

    Click here to watch the story online.


    Q13 features interchange issues. While you generally do not like to hear your city's name combined with the words "traffic nightmare," hopefully such coverage helps lead to funding and solutions for this State-owned interchange.

    Click here to watch the story online.


  • 166th /SR 410 Interchange Featured at City of Sumner Open House

    5 months ago

    The 166th project is being showcased at the City of Sumner Open House! Share your stories about congestion at the location and how traffic at this location impacts your life.

    The 166th project is being showcased at the City of Sumner Open House! Share your stories about congestion at the location and how traffic at this location impacts your life.

  • The News Tribune features 166th

    5 months ago
    Trib166th

    May 30, 2019 - The News Tribune featured an article about the 166th interchange. Click here to read online.



    May 30, 2019 - The News Tribune featured an article about the 166th interchange. Click here to read online.