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Wastewater Treatment

King County, Washington

For questions about the Wastewater Treatment Division website, please send an e-mail message or contact us at:

King Street Center
201 S. Jackson St., Suite 500
Seattle, WA 98104-3855
Phone: 206-477-5371
Fax: 206-684-1741
Telecommunication device for the deaf (TTY): 711

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Staff Contacts

Kirkland Pump Station and Sewer Upgrade Project

Facility operations

Completed spring 2014

Ribbon-cutting and facility tour, May 13, 2014
View presentation materials on the project library page.

Project description

Upgrades to the King County Kirkland Pump Station were completed ahead of schedule in spring 2014. The pump station is located at the corner of Third Street and Park Lane in downtown Kirkland.

As part of the King County Kirkland Pump Station and Sewer Upgrade Project, King County:

  • Increased pumping capacity from 6 million gallons per day (mgd) to a peak capacity of 9.4 mgd to accommodate future growth.
  • Replaced aging equipment to comply with seismic codes, operate quietly and efficiently, and employ state-of-the-art odor control.
  • Upgraded equipment including new pumps, modernized control instrumentation and electrical equipment, and a new standby generator.
  • Installed a new sewer force main to accommodate increased flows, connecting the pump station to the major pipeline on Railroad Avenue.

The pump station receives flows from downtown Kirkland and pumps it east to the main conveyance pipe which takes the wastewater to King County's South Treatment Plant in Renton.


2007 – 2011 Pump station and sewer design
Winter/Spring 2011 Influent sewer complete in Third Street (as part of Transit Center)
Fall 2011 Construction starts
Fall 2011 – Fall 2012 Forcemain construction
July 2013 New pump station fully operational
Spring 2014 Park Lane open and pump station construction complete

Being a Good Neighbor

King County is committed to being a good neighbor and worked directly with the community throughout the project to minimize construction impacts whenever possible. Residents were provided with:

  • Advance notice of construction activities – mail, e-mail, phone
  • One-on-one problem solving with residents directly impacted by construction activities
  • Project website and construction updates
  • 24-hour construction hotline

Project news

For more information