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View project home page for latest project updates. Older project updates are posted on the library page.

Construction activities started in April 2017

King County has started work in April 2017. The first step is to demolish existing buildings and remove contaminated soils. This work will last approximately five months. Treatment station construction begins in early 2018.

What to expect during site preparation

  • Typical work hours 7 a.m. – 6 p.m., weekdays
  • Increased truck traffic, especially near the main entrance on 4th Avenue South
  • Signs and flaggers to safely direct traffic and pedestrians around the work area if temporary lane closures are needed
  • Typical construction activity, including noise and dust


Here are some examples of what you might see during site preparation:

site preparation


Contact us

Construction hotline:

Contact Kristine Cramer at:


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