West Point Treatment Plant

History

• In 1958, voters in Seattle and King County created Metro, an agency charged with developing and operating a regional wastewater treatment system.
• In 1966, construction of a primary treatment plant is completed at West Point.
• In 1991, to comply with the 1972 federal Clean Water Act (external link), Metro begins an expansion of the plant to provide secondary treatment.
• In 1994, resulting from a voter approved proposal to merge Metro with King County, King County assumes responsibility for West Point Plant.
• Expansion and upgrading to secondary treatment is completed in 1996.
• West Point celebrated its 40 year anniversary on Saturday, April 22, 2006 (Earth Day).

West Point Timeline, presented at the Oct. 3, 2009 Open House.
Learn more about West Point (PDF), from 3,000 BC to the present.