Sammamish Plateau Diversion

Project update

January 16, 2025

Geotechnical crews are scheduled to work along East Lake Sammamish Parkway on Friday, January 17 starting at 9 a.m. Crews will be performing seasonal groundwater monitoring and inspecting monitoring wells. This work will result in temporary single-lane closures along East Lake Sammamish Parkway as crews work at each well. This work is expected to take up to one day.

What to expect

The work will be scheduled between 9 a.m. and 4 p.m. during the work week (Monday-Friday) and is expected to take up to one day. This work will require temporary single-lane or turn-lane closures on East Lake Sammamish Parkway Northeast between Northeast 49th Place and Northeast Inglewood Hill Road (see map below). There will be message signs on East Lake Sammamish Parkway Northeast with advance notice of closures.

During this work, flaggers will direct travel throughout the area. The contractor will maintain local and emergency access. Flaggers will treat school buses as an emergency vehicle to reduce delays.

Approximate location of work activities

We anticipate that crews will temporarily close a single lane or turn lane along East Lake Sammamish Parkway Northeast. This map shows the approximate closure and work locations.

We want to hear from you - please take our short survey!

King County’s project team wants to get to know you and your community better. By understanding your needs, we can serve you more effectively during the design and construction phases of this project. Please share your feedback with us by completing this survey. We expect that this survey will take about 10 minutes to complete.

We have two different surveys: one for community members and one for local businesses. If you are both a community member and a local business owner in the project area along East Lake Sammamish Parkway Northeast (see map below), please fill out both surveys.

• Community members: publicinput.com/kcwtdsammcomsurvey
• Businesses: publicinput.com/kcwtdsammbussurvey

If you prefer to provide the information in the survey over the phone or by other means, please contact Monica Van der Vieren at 206-477-5502 or monica.vandervieren@kingcounty.gov.

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