The Arlberg railway crosses the River Ganderbach just after the station at Pians. One abutment of the Ganderbach bridge is located within an area affected by active slope movement.
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In 2001, work started on building the Zauchengraben bridge. The structure is located in a geologically critical area and placed extremely exacting demands on designers.
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The instructions of the Ötztaler Gletscherbahn for the construction of the new "Schwarze Schneid" gondola were crystal clear: build a glacier cableway, but don't build it on ice! A conventional solution such as constructing cableway supports that float on the ice would have been too expensive because of major movements in the Rettenbach glacier and the associated need to repeatedly adjust the cableway supports.
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