SR 520 and Trail closed across Lake Washington this weekend April 5-8; Portage Bay on-land drilling continues; online monthly construction meeting April 17

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:

Reminder: SR 520 and SR 520 Trail closed across Lake Washington this weekend

Crews will close SR 520 and the SR 520 Trail in both directions between I-5 in Seattle and 92nd Avenue Northeast in Clyde Hill starting at 11 p.m. tonight until 5 a.m. Monday, April 8.

During the roadway closure, crews will pave sections of the roadway and test lighting under the Montlake lid. During the trail closure, crews will complete a utility crossing under the trail and install a new bracket for a nearby sign bridge.

Graphic shows map of sr 520 corridor with red lines for closure limits and red dotted line for trail closure.png

Prefer to watch a breakdown of this weekend's closure? We've got you covered! Watch our PSA video.

On-land drilling for geotechnical soil sampling continues

In preparation for the Portage Bay Bridge and Roanoke Lid Project, crews are drilling approximately 22 on-land test holes – also referred to as “geotechnical test borings” – to collect soil samples around the project area (see map of drilling locations below). Work began last week and will continue through the summer. Crews are also currently collecting in-water samples from 10 test holes in Portage Bay. In-water sampling began in March and will continue through April.

This type of site investigation involves evaluating the soil and groundwater conditions within a given depth and location. These soil samples will further inform the project design and help determine the types of tools and construction methods that may be needed.

4524-Graphic shows a map of portage bay with green dots for in-water locations and on-land show in purple dot locations.png

Fostering new growth at the Arboretum

Foster Island in the Washington Park Arboretum has blossomed into a vibrant haven for plants and animals! Dive into the details of our restoration journey on the WSDOT Blog and get ready to explore the new and improved Foster Island Trail. We’ll see you out there!

Photo shows paved trail under bridge with logs and foliage on the side and a deer in the background

Register for our April 17 online construction meeting

We’re holding our next Montlake Project monthly meeting virtually at 12:30 p.m. Wednesday, April 17. Join us to learn about current and upcoming construction activities, including planned street and highway closures. Register below to attend and participate in a Q&A.

Missed our last monthly meeting? You can view the presentation online (PDF 5.6MB) or watch the meeting recording on YouTube.

Construction Corner roundup

  • Ongoing: Montlake Boulevard on-ramp to eastbound SR 520 closed weeknights
  • Ongoing: Portage Bay on-land drilling for soil sampling
  • April 5-8: SR 520 closed in both directions across Lake Washington
  • April 5-8: SR 520 Trail closed across Lake Washington
  • April 8-11: Westbound SR 520 off-ramp to Montlake Boulevard closed nightly

Check out the SR 520 Construction Corner map for the most up-to-date information on 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:
    • Montlake Project: 206-775-8885
    • SR 520/I-5 Connection Project: 206-316-2559 
  • 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 @wsdot_520 to get key news and updates about the SR 520 program.
  • View current Montlake Project construction photos, taken continuously day and night, by mounted construction cameras
  • Share the ROTW listserv with your friends and neighbors

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.

Español - Spanish servicios de traducción Aviso a personas con dominio limitado del idioma inglés: Si usted tiene alguna dificultad en entender el idioma inglés, puede, sin costo alguno, solicitar asistencia lingüística con respecto a esta información llamando al (360) 705-7090, o envíe un mensaje de correo electrónico a: TitleVI@WSDOT.WA.GOV.

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。

tiếng Việt-Vietnamese các dịch vụ dịch thuật Nếu quý vị không hiểu tiếng Anh, quý vị có thể yêu cầu dịch vụ trợ giúp ngôn ngữ, miễn phí, bằng cách gọi số (360) 705-7090 hoặc email cho chúng tôi tại: TitleVI@WSDOT.WA.GOV.

한국어 - Korean 번역 서비스 영어로 소통하는 것이 불편하시다면, (360) 705-7090으로 전화하시거나 다음 이메일로 연락하셔서 무료 언어 지원 서비스를 요청하실 수 있습니다: TitleVI@WSDOT.WA.GOV.

Af-soomaaliga - Somali Adeegyada Turjumaada Haddii ay kugu adag tahay inaad fahamtid Ingiriisida, waxaad, bilaash, ku codsan kartaa adeegyada caawimada luuqada adoo wacaaya (360) 705-7090 ama iimayl noogu soo dir: TitleVI@WSDOT.WA.GOV.

русский - Russian Услуги перевода Если вам трудно понимать английский язык, вы можете запросить бесплатные языковые услуги, позвонив по телефону (360) 705-7090 или написав нам на электронную почту: TitleVI@WSDOT.WA.GOV.

ِيَّة Arabic - اَلْعَ َرب خدمات الترجمة إذا كنت تجد صعوبة في فھم اللغة الإنجلیزیة، فیمكنك مجان ا طلب خدمات المساعدة اللغویة عن طریق الاتصال بالرقم .TitleVI@WSDOT.WA.GOV: الإلكتروني البرید عبر مراسلتنا أو)، 360) 705-7090


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.