Elimination of Environmental Footprint: LVCC Expansion

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The Las Vegas Convention Center expansion required approximately 600 uncased foundation shafts, each 60 feet deep. Excavation encountered groundwater and generated more than 2.5 million gallons of slurry containing soil solids, trace metals, and perchloroethylene (PCE) associated with former site uses.<br /><br />The initial treatment approach—storage tanks followed by sock and carbon filters—proved too slow because the high solids content quickly clogged the filters, delaying construction and increasing costs. BOS Solutions introduced a mobile closed-loop dewatering system. It mixed flocculant with the slurry and processed it through a centrifuge, separating solids into a dry, stackable cake and producing clearer water. The reclaimed water then passed through the original filters as an additional safeguard before testing and reuse for on-site dust control.<br /><br />Testing showed substantial reductions in suspended solids, metals, and PCE in the treated water. The project reclaimed an estimated 1.2 million gallons of water and produced more than 6,400 tons of solids. Reclaiming water and reducing the volume of waste sent off site avoided disposal costs estimated at over $500,000, while also reducing landfill use and emissions from waste hauling.

Keywords

Las Vegas Convention Center

foundation shafts

groundwater

slurry treatment

dewatering system

centrifuge

flocculant

perchloroethylene

water reclamation

solid waste reduction