 On 18 January 1977 electric locomotive 4620, while hauling an 8-car train travelling from the Blue Mountains to Sydney, derailed at Granville, hitting a row of supports of an overhead road bridge, causing the bridge to collapse on to two passenger cars of the derailed train.83 people died and more than 200 were badly injured in this, Australia's worst-ever railway disaster.On 21 March 1979 a woman was killed and her son injured in a level-crossing accident near Queanbeyan.