what we do

Solid & Hazardous Waste

Reducing and safely processing solid waste

Public awareness and new technologies are changing the solid waste industry. Parametrix helps clients respond to these changes by developing cutting-edge solutions geared toward reducing waste and operating waste facilities in a sustainable manner. Our solutions use new technologies, improve productivity, reduce costs, and ensure effective environmental controls.

Cedar Hills Regional Landfill | Parametrix
​Cedar Hills Regional Landfill
​Maple Valley, Washington
Client: ​King County

Since 2001, Parametrix has provided construction management services at this 3,000+ ton/day landfill for several capital improvement projects. These projects include improving landfill operations, closing cells, and developing new cells. Our work has included developing two new cells encompassing 60 acres and closing eight areas totaling over 80 acres. We also supported the County with their efforts to deliver landfill gas to a BioEnergy natural gas facility. This allowed usable energy to be generated from methane gas produced at the landfill.



  • Solar Evaporation Ponds | Parametrix

    Solar Evaporation Ponds

  • North Transfer Station | Parametrix

    North Transfer Station

  • Cedar Hills Landfill | Parametrix

    Cedar Hills Regional Landfill

  • Factoria Recycling | Parametrix

    Factoria Recycling & Transfer Station

  • Horn Rapids Landfill | Parametrix

    Horn Rapids Landfill Site Closure

  • Simco Road Landfill | Parametrix

    Simco Road Regional Landfill