Rhomberg Bahntechnik as general contractor in a consortium (ARGE Bahntechnik Loetschberg), executed the contract for the technical railway equipment of the Loetschberg base tunnel of BLS -- AlpTransit, Berne. The Loetschberg Base Line runs from Frutigen to Raron. It comprises, in the north, the connection to the BLS Line and the Frutigen bypass with the Engstligen tunnel, the Loetschberg base tunnel as well as, in the south, the Rhone crossing and the connection to the SBB (Swiss Federal Railway) line. The centrepiece is the 34.6 km long Loetschberg base tunnel, consisting of two single-track tunnel tubes about 40 m apart and connected very 333 m by transverse galleries. The tunnel work was completely executed in only 42 months, from the start of pre-assembly in Berne to project completion.