 One was the Bump Line, which was built in about 1913 with a steep section across the range at the head of the Little Yarra River, using a steam winch-hauled incline.This was replaced in July 1925 to with a 313 metre long tunnel which was about 2.8 m wide and 4.0 m high and took 13 months to dig.It was timber-lined and had a vent shaft in the middle through which smoke escaped.