829 Evans Road, P.O. Box 490, Clarkston, WA 99403
Phone: (509) 751-1580, Fax: (509) 751-1922 E-mail
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829 Evans Road, P.O. Box 490, Clarkston, WA 99403 Phone: (509) 751-1580, Fax: (509) 751-1922 E-mail |
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| Roosevelt
Regional Landfill, Roosevelt, Washington MSW Cells 7 through 15, Ash Cells E through H Contracting Agency: Allied Waste |
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| Construction of municipal solid waste and municipal solid waste ash landfill cells to strict Washington State regulatory standards. Cell sizes have ranged from 2.5 to 23.0 acres with excavation depths from 15 to 80 feet. Projects included topsoil, rock and overburden excavation, cell embankment and sub-grade preparation, placing of soil liner material, moisture conditioning, compacting, to an impervious specification; application of drainage aggregate, installation of HDPE leachate collection and transmission lines, and leak detection systems. Current cells have been constructed using a geosynthetic clay liner as an alternative to the soil liner system. Excavation over several years has exceeded 6 million cubic yards. | |||
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Stevens
County
Landfill, Kettle Falls, Washington MSW Cell 2 Construction & Leachate Pond #1 Contracting Agency: Stevens County & CH2M Hill |
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Construction of an 11 acre municipal solid waste landfill cell and reconstruction of a leachate pond. The project included 150,000 cubic yards of excavation, and 50,000 cubic yards of drain sand over a GCL and HDPE liner system. Also included was leachate collection lines, leachate transmission line, along with leachate pumping and monitoring systems. Special challenges for the project included working with the owner to develop excavation methods when perched water created over saturated conditions. |
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Missoula Landfill,
Missoula, Montana |
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The multi faceted projects involved excavation of 1,000,000 cy of material for two municipal solid waste landfill cells; extension of vertical gas extraction wells and manholes, modification of drainage swales on an adjoining cell; construction of access roads, leachate collection and leak detection systems, application of protective soil cover, installation storm water culverts and drainage systems, and hydro-seeding. |
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| Wasco
County Landfill, Dalles, Oregon MSW Cell 1A and Future Cell 3 Contracting Agency: Waste Connections, Inc. |
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This project included 500,000 cubic yards of excavation in the construction of two landfill cells. A 1.2 acre cell extension including GCL, HDPE liners and drain rock, was built for immediate use and a five acre cell was excavated for future needs. |
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Potlatch Pulp &
Paperboard Mill, Lewiston, Idaho |
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Final
cover to close Potlatch's powerhouse boiler ash landfill. The project
included excavation, transportation, application, and compaction of approximately
67,000 cubic yards of soil cover, and construction of surface run off
collection ponds. Attention to needs of the customer resulted in a win-win
relationship, and expansion of work with this customer. |
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Asotin
County Landfill, Clarkston, Washington |
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The requirements
of this job were to build a new waste disposal cell for Asotin County
in Clarkston, Washington. The completed cell covers approximately 12 acres,
80 feet deep. The work involved over 650,000 cubic yards of excavation,
installing geosynthetic clay lining, leachate pipe, as well as fencing
and erosion control. |
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| Pendleton
Landfill, Pendleton, Oregon Landfill Cell Closure Contracting Agency: Sanitary Service Company |
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Final
cover to close the Pendleton
municipal solid waste landfill. Required excavation, transport, application
and compaction of soil cover, and construction of drainage systems to
meet Oregon Department of Environmental Quality regulatory standards.
the project was in a dry arid region with high daytime winds creating
significant blowing dust. To compensate for the daytime winds and low
water availability at the site a considerable amount of the work was done
at night. |
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