The conditions for the construction and successful operation of such a plant are particularly attractive in northern Switzerland, because of the significant potential of heat consumption and of the known geological and geothermal conditions. The two main requirements for site selection are a temperature of 200 C at a depth of about 5 km and local heat consumers connected to a large heat distribution network. Building a Deep Heat Mining (DHM) plant does not require the development of essentially new technologies. For decades, electric power has been generated economically from geothermal fields all over the world