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Decontamination Hazardous Waste Landfill, Kölliken, Switzerland

Erecting the assembly bridge used to support the arches during construction

A view of the Kölliken site with the storage, processing and excavation halls (from left to right)

Partially filled landfill site with a crawler crane being used to remove the last two arches

Control center for the fire water sprinkler and deluge system during landfill excavation

Breaking up steel and sorting materials with hydraulic demolition shears

Further slope-stabilization anchoring following waste excavation

Construction of walls for the interior work of the processing hall

A 500-metric-ton crawler crane erecting the arched hall, which appears very delicate from a distance

Using brute strength to position an arch on the concrete wall support

Drilling anchor piles to support the excavation bracing system

Disassembling the framework high up on the structure

Erecting the warehouse wall that surrounds the landfill site

Filling in the landfill with uncontaminated material as a basis for the demolition

A crane being used to remove the purlins

View of the imposing arch structures above the Kölliken hazardous waste landfill site

Arch framework of the column-free landfill containment structure

A 650-metric-ton crawler crane removing one half of an arch, weighing around 90 metric tons

Tensioning the slope-stabilization anchor in the contaminated zone

Interior work in the processing hall after the excavation of the landfill waste

Fixing the crane attachment points for the removal of the arches

Breaking up the removed steel arches using hydraulic demolition shears