Skip to main content

KingCounty.gov is an official government website.

Official government websites use .gov
Website addresses ending in .gov belong to official government organizations in the United States.
Secure .gov websites use HTTPS
A lock or https:// means you've safely connected to the .gov website. Only share sensitive information on official, secure websites.
King County Washington home

Completed capital projects

View a list of recently completed wastewater capital projects.

Ballard Siphon replacement, Seattle (2014)

Barton CSO control / green stormwater infrastructure, Seattle (2015)

Barton Street Pump Station upgrade, Seattle (2015)

Bellevue Pump Station upgrade & force main installation, Bellevue (2011)

Bellevue influent trunk improvement, Bellevue (2012)

Brightwater Treatment System (2012)

Denny Way/Lake Union CSO control, Seattle (2005)

Denny Way Regulator Station upgrade, Seattle (2018)

Eastgate Interceptor lining, Bellevue (2018)

Eastside Interceptor lining (Section 2), Renton (2020)

Eastside Interceptor lining (Section 13), Bellevue (2016)

53rd Avenue Pump Station upgrade, Seattle (2010)

Fremont siphon replacement, Seattle (2017)

Georgetown Wet Weather Treatment Station, Seattle (2023)

Heathfield Force Main Rehabilitation, Bellevue (2026)

Henderson/M.L. King CSO control, Seattle (2005)

Hidden Lake Pump Station replacement and sewer improvement, Seattle (2009)

Interbay Pump Station upgrade, Seattle (2015)

Juanita Bay Pump Station replacement, Seattle (2009)

Kent-Auburn conveyance system improvements (Phase A), Kent & Aburn (2014)

Kent-Auburn conveyance system improvements (Phase B) Kent, Auburn, & Pacific (2019)

Kirkland Pump Station and sewer upgrade, Kirkland (2009)

Lake Hills Sewer Relining, Bellevue (2023)

Loop® vehicle maintenance facility, North Bend (2022)

M Street trunk repair, Auburn (2020)

Magnolia Wet Weather Storage Facility, Seattle (2019)

Murray Wet Weather Facility, Seattle (2017)

North Beach CSO control, Seattle (2017)

North Beach force main maintenance, Seattle (2012)

North Beach outfall assessment, Seattle (2013)

North Creek Interceptor, Bothell (2019)

North Creek Storage Facility, Bothell (2004)

Rainier Valley wet weather storage, Seattle (2018)

Ravenna Creek pipe extension, Seattle (2011)

Skyway infiltration/inflow reduction, Seattle (2012)

Sunset and Heathfield pump stations upgrades - Bellevue (2022)

Sweyolocken Pump Station upgrade, Bellevue (2005)

Thornton Creek Basin - sewer study and upgrade (2023)

West Point Treatment Plant office annex, Seattle (2014)

West Point Treatment Plant screenings improvement, Seattle (2015)

West Point Treatment Plant Improvement Projects, Seattle (2018 and later)