Roanoke lid construction begins; casing installation continues in Portage Bay

There is a horizontal green band that reads Rest of the West News. Above it is the letters W S D O T. An oval on the right reads state route 520.

In this update:


Casing installation progress update

Crews continue to use vibratory hammers to install large-diameter steel casings in Portage Bay. The map below shows our progress to date.

Virbatory work map

This week, crews plan to continue work on Friday, June 19, and Saturday, June 20. Visit our Construction Corner webpage for the most up-to-date schedule of construction activities, including casing installation work. We expect to complete this phase of work within the next few weeks.

Hearing noise or experiencing vibration? Call our 24/7 hotline.

We monitor noise and vibration in real-time around the project area. If you feel like you’re experiencing excessive noise or vibration from this work, please call the 24-hour hotline as soon as possible at 206-319-4520 so we can investigate in real time. You can also email us at sr520bridge@wsdot.wa.gov (monitored Monday through Friday, 8 a.m. to 5 p.m.).


Next phase of lid construction underway near Roanoke Park

This week, crews assembled cranes and other construction equipment in the area between East Roanoke Street and SR 520 to kick off the next phase of lid construction.

Over the coming months, crews will install drilled shafts that will eventually support the future Roanoke lid.

Instead of using a vibratory or impact hammer to install the steel casings for each drilled shaft, crews will use an oscillator to rotate the steel casings into the ground. Crews will plan to work west to east (from 10th Avenue East to Delmar Drive East).

Nearby neighbors will experience noise and vibration during daytime construction.

What neighbors should expect:

  • Drilled shaft installation between East Roanoke Street and SR 520.
  • Typical work hours: 7 a.m. to 10 p.m. weekdays (excluding most holidays) and 9 a.m. to 10 p.m. on weekends.
  • Increased noise and vibration during this work from trucks and equipment.
  • Flaggers on Delmar Drive East to help guide construction vehicles in and out of the work zone. 
  • Daytime parking restrictions (6 a.m. to 6 p.m.) on the west side of 11th Avenue East between Delmar Drive East and East Miller Street, and on the east side of Boyer Avenue East between East Roanoke Street and Everett Avenue East.
Camera view of Roanoke Park work.png

Construction equipment arrives as work ramps up for the future Roanoke lid.


Thanks to everyone who joined us at last week's pop-up!

Thanks to everyone who stopped by our pop-up event last week at Roanoke Park! The WSDOT and Skanska teams appreciated the opportunity to meet with neighbors and answer questions about current and upcoming construction.

If you missed us, don’t worry! We’ll have more in-person events later this summer and fall. We’ll share more details as we have them.

Roanoke Park pop-up photo

Community members at our Roanoke Park pop-up last week.


Construction Corner roundup

  • Feb. 18 - June 18: Boyer Avenue East between East Roanoke Street and Everett Avenue East reduced to single lane weekdays
  • June 22: Eastbound SR 520 off-ramp to Montlake Boulevard closed overnight
  • Updated weekly: Vibratory casing installation schedule in Portage Bay

Check our Construction Corner map for the most up-to-date information on SR 520 closures and construction impacts.


How to reach us and stay informed about SR 520 construction:

  • Call or text our project-specific construction hotlines with pressing questions or concerns related to the:
    • Portage Bay Project: 206-319-4520 (24-hour hotline)
    • Montlake Project: 206-200-9484, M-F 8 a.m. - 5 p.m.
  • Call the SR 520 Program information line (206-200-9484, M-F 8 a.m. - 5 p.m.) with general SR 520 inquiries.
  • Email SR 520 staff with your questions about the project or construction activities.
  • Visit the SR 520 Construction Corner for the most up-to-date information on closures and construction impacts.
  • Visit the SR 520 Program website to find general information about the project.
  • Email Regina Glenn, WSDOT Megaprograms Diversity and Inclusion Manager, for more information about contracting opportunities.
  • Follow us on Twitter/X and BlueSky ‪to get key news and updates about the SR 520 program.
  • Share the ROTW listserv with your friends and neighbors.
  • View construction photos taken 'round the clock by our four mounted construction cameras.

Note: We combined our two SR 520 Program email lists into one. This newsletter will focus on Portage Bay Project construction and closures while also sharing other SR 520 updates. You can manage your preferences or unsubscribe anytime.


If you have difficulty understanding English, you may request language assistance services free of charge by calling (360) 705-7090 or emailing TitleVI@WSDOT.WA.GOV.

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中文 - Chinese 翻译服务 如果您难以理解英文,则请致电:(360) 705-7090,或给我们发送电子邮件: TitleVI@WSDOT.WA.GOV,请求获取免费语言援助服务。

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Thank you for signing up for the SR 520 Rest of the West news email updates. WSDOT will keep the community informed of current and planned construction activities through these updates and the tools listed above.