Cedar Hills Regional Landfill Area 8 Closure Area 9 Demolition and Excavation

This contract pertains to the comprehensive closure and demolition activities at the Cedar Hills Regional Landfill, specifically focusing on Area 8 and Area 9. The scope of work for Area 8 includes installing both interim and final cover systems utilizing geomembranes or other geosynthetic materials, establishing erosion and sediment controls, and implementing landfill gas systems, stormwater management features such as ditches and conveyance systems, as well as preparing the subgrade and installing a contaminated stormwater flap. For Area 9, the work involves removing stockpiles, soil, underground storage tanks, and demolition of building foundations and structures, alongside the removal of utilities and infrastructure, and installing conveyance piping, stormwater controls, and seepage controls, all as detailed in the contract documents. The project is managed by King County, Washington, with a solicitation posted on January 31, 2025, and a response deadline of February 20, 2025. The contract value is estimated to range between 5 million and 15 million dollars. The work is designated under NAICS code 561730, which pertains to landscaping services, but the scope clearly involves environmental remediation, demolition, and land closure activities. The primary point of contact for this project is Leeann Snyder, whose contact details are provided for inquiries. The project emphasizes environmental protection, infrastructure removal, and land rehabilitation to ensure proper closure of the landfill areas.