Description
The Cedar Hills Landfill project will prepare Area 6 to accept mixed solid waste and complete intermediate measures for Area 5 closure.
All mixed-solid waste generated in King County outside of the city of Seattle is taken to and managed by the Cedar Hills Landfill, which spans 920 acres.
In order to safely process the waste, the landfill must operate disposal piles in various stages of decomposition and continually plan for new sites that can accommodate the large volumes of material that need to be disposed of.
Environmental concerns are a significant issue when dealing with the vast quantities of waste that landfills handle.
Landfill processing must comply with strict environmental regulations.
Constructing a new site for refuse disposal in Area 6 requires excavating and lining a large pit.
The development calls for installation of geo-synthetic materials and pipes, and will include construction of extraction wells and pumping facilities.
The wells and pumping facilities are necessary to manage the gas generated by the decomposing waste.
The project also involves Stage 3 closure of the existing refuse disposal site at Area 5.
The staged closure requires installing intermediate cover systems for partial closure and preparing the final covering systems for the long-term Area 5 closure.
Final closure of Area 5 will occur in Stage 4 once Area 6 is operational and ready to accept waste.
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Contractor:
Robison Construction, 1216 140th
Ave. Court E., P.O. Box 1730,
Sumner, WA 98390,
(253) 863-5200
Engineers:
(Area 6 development) HDR
Engineering, 500 108th Ave., N.E.,
Suite 1200, Bellevue, WA
98004-5549, (425) 453-1523
(Area 5 closure) URS Corp., 1501
Fourth Ave., Suite 1400, Seattle,
WA 98101-1616, (206) 438-2700
Construction manager:
Parametrix, P.O. Box 460, Sumner,
WA 98390-1516,
(253) 863-5128
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Other Participants
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City Transfer
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Enumclaw Quarry
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Gears Inc.
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Granite Precasting & Concrete
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H.D. Fowler Co.
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Lakeside Industries
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Lakevue Construction
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Malcolm Drilling
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Northwest Boring
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Northwest Linings & Geotextile
Products
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Pacific Concrete Services
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Terra Dynamics
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Wyo-Ben Inc.
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