Deep reaching faults gain in importance in geothermal exploration in Germany. Fault zones have emerged as prominent drilling targets for the exploitation of hydrothermal resources in the pursuit for higher production rates (e. g. in the Upper Rhine Graben and the Molasse Basin). This is the rational ground why fault zones were attributed and linked with a scientific literature data base in the project "The Role of Deep Reaching Fault Zones for Geothermal Energy Utilization" which was funded by the Federal Ministry of Economic Affairs. In addition, two new structural 3D models were created and the structural model "GeoPower" of Schleswig-Holstein was implemented in the geothermal information system GeotIS.