sentences:  There are two railway stops on Kettwig territory, both are served by the S6 line of the Rhine-Ruhr S-Bahn since May 1968.Kettwig railway station is situated on the northern side of the Ruhr and dates back to the 1870s, whilst Kettwig Stausee railway station opened in 1945 after the destruction of the rail bridges over the Ruhr, serving "Kettwig vor der Brücke".The latter used to connect to lines leading to Mülheim an der Ruhr and Velbert, but these have been closed in the 1960s.