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Wastewater Treatment Division (WTD) operations and projects

WTD operations staff remain on the job 24/7 to ensure the region’s wastewater treatment service continues. More information on how to report a problem you believe may be related to the County’s wastewater treatment system is available here: https://www.kingcounty.gov/depts/dnrp/wtd/response.aspx

The King County Wastewater Treatment Division remains committed to sharing information and gathering feedback from community members about its work and projects. WTD staff remain available to answer questions via email and phone during regular business hours. Project information lines remain available and are being monitored for ongoing construction projects.

Project update - April 8, 2020

Work on this project continues at the pump stations. The City of Bellevue has paused all work in the Right of Way so there will be minimal disruptions to traffic at this time. Please sign up for our construction emails to be alerted to future construction impacts

Spring newsletter – making progress

The Sunset and Heathfield Pump Station and Force Main Upgrade project replaced over 1 mile of aging pipe and is upgrading two pump stations to make sure that our equipment can deliver reliable service to your community. Read more in the spring newsletter .

Road work information

road closure map

Closure information and work hours

  • Intermittent single-lane closures of SE 35th Pl during working hours.

Work hours

  • Weekdays 7 a.m. to 7 p.m.
  • The contractor may work on weekends as needed. We will keep you updated on weekend work through our email updates.

Timing

  • This work will continue through 2020.

Major work being performed

  • Restoration

Closure information

  • Intermittent single-lane closures on 164th Pl SE during working hours.
  • Both lanes of traffic will be open outside of working hours.

Work hours

  • Weekdays 7 a.m. to 7 p.m.
  • The contractor may work on weekends as needed. We will keep you updated on weekend work through our email updates.

Timing

  • This work will continue through 2020.

Major work being performed

  • Restoration

Closure information

  • Intermittent single-lane closures on 163rd Ave SE during working hours.
  • Both lanes of traffic will be open outside of work hours.

Work hours

  • Weekdays 7 a.m. to 7 p.m.
  • The contractor may work on weekends as needed. We will keep you updated on weekend work through our email updates.

Timing

  • Intermittent through the end of construction in early 2020.

Major work being performed

  • Transport of large equipment.

Closure information

  • Intermittent single-lane closures during working hours, as needed.
  • To be notified in advance of a planned full closure for deliveries, please sign up for email updates on this page.

Work hours

  • Weekdays 9 a.m. to 3 p.m.

Timing

  • This work will continue through the end of construction in 2020.

Major work being performed

  • Transport of large equipment.

phases_graphic_construction

Contact us

Contact Caryn Sengupta, community services lead at:
 caryn.sengupta
@kingcounty.gov

206-296-7800 (24-hour construction hotline)
 Feedback form

Sign up for email or text updates

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Project description

The Sunset and Heathfield Pump Stations and related sewer pipes send sewage from Sammamish, Issaquah, and Bellevue to be cleaned at King County’s treatment plant in Renton. This sewer system has provided reliable service for around 50 years and is reaching its limit.

This project will upgrade both pump stations and the connected force main pipe. The project will also upgrade the Eastgate Trunk structure near I-90. The Eastgate Trunk connects the force main pipe to a larger pipe, carrying flows to be treated at the South Treatment Plant in Renton. The improved system will help serve the growing population for many years.

Read our December 2016 newsletter for more information about how community feedback influenced final design and for details about upgrades to the pump stations.

Sunset Pump Station upgrades

Sunset Pump Station Final Design

  • Four new pumps to increase capacity
  • New electrical and controls systems
  • New standby generator allowing the station to continue operating during power outages
  • New heating and air conditioning systems (HVAC)
  • Addition of native plans and restoration of shoreline habitat
  • Roof replacement and added green roof to manage stormwater
  • New lighting and fencing
  • Permeable driveway

Heathfield Pump Station upgrades

Heathfield Pump Station Final Design

  • New lighting and fencing
  • Four new pumps to increase capacity
  • New electrical and controls systems
  • New standby generator
  • New heating and air conditioning systems (HVAC)
  • Rain garden
  • Landscaping
  • Roof replacement

Project area

Project schedule

Crews will work to restore SE 35th Pl and 164th Pl SE in early 2020.

Pump Station work will continue into 2020.

Project location

Project locator map for Sunset and Heathfield pump stations and force main upgrade

Back to the capital projects overview map .

Heathfield Pump Station,
3541 163rd Ave. S.E., Bellevue

Sunset Pump Station,
3730 W. Lake Sammamish Pkwy. S.E., Bellevue