 After the take over of the Bonn–Cologne Railway Company () by the "Rhenish Railway Company" ("Rheinische Eisenbahngesellschaft", RhE) on 1 January 1857, it built the left Rhine railway in sections to Bingerbrück.With the opening of the last section on 15 December 1859, it connected to the Hessian Ludwig Railway to South Germany.In 1864, it built the Pfaffendorfer Rhine bridge below the Ehrenbreitstein Fortress and the bridge over the Lahn at Oberlahnstein to connect with the Nassau Rhine Railway ("Nassauische Rheinbahn") of the Nassau State Railway ("Nassauische Staatsbahn") at Niederlahnstein, completed on 3 June 1864, creating a second railway next to the Rhine from the Rhineland to southern Germany, now known as the Left Rhine line.