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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

Get Directions to our office location in Seattle, Washington.

Staff Contacts

Barton Street Pump Station upgrade project

Project construction

November 2014 Construction Update
As construction progresses, King County will continue to provide monthly project updates to keep the community informed. King County will notify the community and ferry commuters should any ferry lane closures or work requiring additional notification occur.

Upcoming activity
Over the next month, work will continue to be focused underground. Crews will also begin wet well concrete work in the pump room. Because of the tight work space, site restoration, landscaping and artwork installation will occur early next year, after the pump station is operational.

New electrical equipment being installed
View the October 31 construction update (PDF).

We appreciate your ongoing patience during construction!

Future facility
 Landscape site plan
Landscape site plan
 (PDF)

Southeast view of the proposed Barton Pump Station upgrade
Southeast view
 (PDF)

Need for project

King County protects public health and the environment by conveying and treating the region's wastewater. The Barton Street Pump Station is 50 years old. King County must upgrade the facility to accomodate West Seattle's growing population and ensure its safe and reliable operation for the next 50 years.

The pump station is an underground facility located next to the Fauntleroy ferry landing at 9005 Fauntleroy Way, SW. The pump station pumps wastewater to the Murray Avenue Pump Station which then pump flows to the county's regional treatment plant at West Point in Seattle.

What you can expect during construction

  • Typical construction activities including work crews, truck hauling, construction materials and heavy machinery
  • Work hours in compliance with City of Seattle permits, which typically allow work between 7 am and 6 pm Monday to Friday
  • Advance notice provided of work outside regularly scheduled hours
  • Access at all times for ferry traffic, emergency vehicles, and neighborhood residents
  • No beach access during construction
  • State patrol on site for traffic control for duration of construction

View construction schedule here.

Proposed work

The pump station was first constructed in 1958. The following necessary improvements will be made:

  • Replace outdated electrical equipment, pumps, and associated equipment. The new pumps will increase capacity from 22 million gallons per day (mgd) to 33 mgd
  • Upgrade heating, ventilation and air conditioning
  • Construct a new underground vault to house a new backup generator system and a new odor control system
  • Construct a new underground valve room and install new valves for the two 24-inch force mains that were installed as part of a 2006 emergency repair project

These upgrades will require the demolition of the existing below ground pump station and the construction of a temporary pumping system that will be removed once the new system is operational.

Being a good neighbor

King County is committed to being a good neighbor and will work directly with the community throughout the project to minimize construction impacts whenever possible.  Residents can expect:

  • Advance notice of construction activities via mail, email, phone, and project fliers
  • One-on-one problem solving with residents directly impacted by construction activities
  • Project website and construction updates
  • 24-hour construction hotline
  • Restoration of landscaping

Construction schedule

Barton Street Pump Station Upgrade Construction Timeline

View construction schedule as PDF.

Project updates

News releases

For more information

Sheet Pile Driving Video
Learn how King County Wastewater Treatment Division creates safe underground work environments using a technique known as sheet pile driving (WTD YouTube Channel). During the winter and spring of 2013, King County used a vibratory hammer to install sheet piles, a technique which works well in tight spaces with minimal impacts on nearby neighbors and the environment.

Related information