The line was disrupted during the war by the destruction of the Ruhr bridge at Fröndenberg as a result of the floodwave caused by the air raid on the Mohne Dam (Operation Chastise) on 17 May 1943. After the construction of a temporary bridge rail traffic resumed and was also used to supply the labour camp for Schwalbe I (an underground factory built to avoid air raids) at Öberrödinghausen. Two years later, the railway was closed again by the blowing up of the railway bridge in Sanssouci. In June 1945, traffic was resumed after the construction of a temporary bridge, which was used until 1952.
