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Washington State law requires that each county, in cooperation with the cities located in the county prepare a coordinated, comprehensive solid waste management plan (Plan) as outlined in RCW 70.95.080. The current Plan, the 2001 Comprehensive Solid Waste Management Plan, along with a State Environmental Policy Act (SEPA) non-project Environmental Impact Statement (EIS) that addressed the potential impacts of implementing the plan, was adopted in 2001. Actions taken by the Division since then to update the 2001 Plan are:

  • In 2005, the Division, in collaboration with the cities, began preparation of the 2007 Transfer and Waste Management Plan (Transfer Plan), as well as preparation of a SEPA EIS that supplemented the 2001 Plan’s EIS. The County Council adopted the Transfer Plan in 2007; and
  • In 2011, along with a SEPA Determination of Non-Significance (DNS), and in 2013 the 2001 Plan was reviewed and updated. However, these reviews were not formally adopted by the King County Council or by our partner cities.

The Division is now updating the 2001 Plan with the 2019 Comprehensive Solid Waste Management Plan (2019 Plan). The proposed 2019 Plan will present strategies for managing King County’s solid waste over the next 6 years, with consideration of the next 20 years. The 2019 Plan will include policies, recommendations, and goals for: solid waste system planning; waste prevention, recycling, and solid waste collection; solid waste transfer and processing system; landfill management and solid waste disposal; and solid waste system finance.
The proposed 2019 Plan would incorporate a number of policy and program changes, including:

  • A reevaluation of the 2007 Transfer Plan which may mean changes to the transfer system that were not discussed in the 2001 Plan or its 2011 and 2013 reviews
  • Recommendations from the Division’s Sustainable Solid Waste Management Plan to study options for resource recovery, and changes to how the solid waste rate is structured
  • Possible policy changes such as instituting mandatory recycling requirements throughout the County, a new 70% recycling goal, and new construction and demolition debris recycling and disposal policies
  • Consideration of anaerobic digestion (AD) and advanced materials recovery (AMR) processing as possible transfer/processing options
  • Extending the life of Cedar Hills Regional Landfill by optimizing development of the site for landfilling
  • Consideration of waste-to-energy and other alternative conversion technologies as long-term disposal options, in addition to waste export, and partial early export

The Division is working with its advisory committees, the Metropolitan Solid Waste Management Advisory Committee and the Solid Waste Advisory Committee, to update the 2019 Plan. A draft Plan, to be released for public review, is anticipated by the fourth quarter 2017.

Project schedule

Project Schedule – Updated June 2017 – subject to change
Date Actions/Events/Public Meetings
June 26, 2017 Determination of Significance and Request for Comments on Scope of Environmental Impact Statement issued by
King County Solid Waste Division in accordance with the State Environmental Policy Act (SEPA)
July 17, 2017 Comments due on the scope of the Environmental Impact Statement
June – October Meet with advisory committees to continue development of the draft 2019 Plan
October Draft 2019 Comp Plan available for public comment
December Draft Environmental Impact Statement available for public comment



For questions about the Comprehensive Solid Waste Management Plan update, please contact:

Beth Humphreys
Strategy, Communications & Performance Section
King County Solid Waste Division
Telephone: 206-477-5264, TTY Relay 711

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