The model shows an innovative membrane roofing that was implemented using the Harzdrenalin technique at the Rappbode Dam in the Harz region. The structure impresses with the use of modern membrane elements that are both aesthetically and functionally convincing. The engineering office for structural design Gisela Zündel contributed significantly to the design of the system. Innovative tensioning systems and modern materials technologies ensure a sustainable construction method. The model illustrates the successful combination of technology and design.