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201 S. Jackson St., Suite 500
Seattle, WA 98104-3855
Phone: 206-684-1280
Fax: 206-684-1741
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Staff Contacts

Puget Sound shoreline next to the West Point Treatment Plant, Seattle

Black Diamond wastewater infrastructure upgrade

Project library

Project update

Project flier, April 2008 (PDF file)

Alternative facility diagrams

Alternative A - Below-grade storage tank at pump station site A - Below-grade storage tank at pump station site (PDF 1.5MB)
Alternative C - Storage tunnel C - Storage tunnel (PDF 1.5MB)
Alternative D - Pipeline Storage Open Cut Option D - Pipeline storage open cut option (PDF 1.6MB)
Alternative E - Storage at the Abandoned Treatment Lagoon Site E - Storage at the abandoned treatment lagoon site (PDF 1.5MB)

More information

Contact Doug Marsano about King County's project at 206-684-1235 or doug.marsano@kingcounty.gov

News releases

May 8, 2008 -- King County hosting May 13 public meeting on Black Diamond sewer improvement project

Updated: April 20, 2009

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