The route of the northern end was contentious. The concession referred to a line between Siegburg and Niederlahnstein and under the original plans the line should have turned at Beuel on the Rhine to Siegburg. Later the line should have been extended via the Agger River valley to Overath and then via Witten to Bochum, or alternatively Essen. These plans were, however, viewed critically in Cologne, since it would have involved the construction of a major traffic axis through the Bergisches Land near Cologne. Gustav von Mevissen, president of the Rhenish Railway, preferred a route via Troisdorf and Opladen to Essen.