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SR 522 - Paradise Lake Road Interchange


November 2015

  • This project received funding that is limited to design work in the Connecting Washington transportation package. It has not received any construction funding.
  • Design work funding through Connecting Washington becomes available in 2025. Until then, this project will remain on hold.. 
  • Drivers can sign up to receive e-mail updates about work along the SR 522 corridor and other state highways in Snohomish County. 

We will replace the existing intersection at State Route 522 and Paradise Lake Road in Maltby, just north of Woodinville, with a new interchange.

Why is WSDOT building a new interchange at SR 522 and Paradise Lake Road?
The interchange will alleviate bottlenecks that occur each day during the morning and afternoon commutes at this intersection in Maltby. It will also reduce the likelihood of rear-end collisions, greatly improving driver safety.

The End Result
We will replace the existing traffic signal with a freeway interchange. On-ramps and exits and a new bridge over the highway will result in smoother transitions between SR 522 and adjacent county roads. This will greatly improve traffic flow and driver safety.

Project Benefits

  • Safety: Building an interchange at SR 522 and Paradise Lake Road will increase traffic flow and decrease congestion. Improving flow will decrease rear-end collisions during stop and go conditions, making the roadway safer for drivers.
  • Congestion Relief: A new interchange means increased flow, which will cut down on drive times and driver frustration.
  • Environment: We will build detention ponds to improve water storage quality. The ponds will collect and filter dirty rain water from the highway before it is released slowly into the adjacent creeks, benefitting salmon and other wildlife. The ponds also reduce the potential for flooding in area creeks.

What is the project timeline?
Full project design, right of way acquisition, and project construction are not currently funded. If funding becomes available, WSDOT's first priority would be to complete design work for the new interchange.

Financial Information

Final project design, right of way acquisition, and project construction are not currently funded.

How can I get more information?
Cathy George
WSDOT Engineering Manager

Kris Olsen
WSDOT communications

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