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The Kaprun power plant in Salzburgerland (Austria) is one of the largest hydroelectric power plants in Europe. The associated new pumped storage power plant Limberg III is perfectly tailored to future energy needs. Marti, together with the ARGE partner PORR, implemented the project on behalf of Verbund Hydropower AG. A particular challenge: the tunnel boring machine had to overcome a gradient of 90.04% in the inclined shaft and therefore had to meet the highest safety standards.