For the design of FCC trajectory a full understanding of the subsurface geology that will be crossed by both the tunnel and the access shafts is required. A basic knowledge of the regional rock composition and structural elements such as fain fault of the subsurface and the hydrogeological characteristics of the area has been broadly summarized in the context f the GEOMOL and SQUAT project. These however provide a general knowledge framework, which is heterogeneous and some how incomplete across the French and Swiss border.

The scopes of this project are 2 folds: I) establish a GIS-based subsurface data set and data base architecture in support of the feasibility and execution of the FCC tunneling work by defining a standard data set framework for new data II) establish a consistent high-resolution 3D geological model, supported by quantitative geological analytical investigations along the FCC trace aimed at predicting geological features and possible risks in support of tunneling design, planning and execution.