Windmill Hill Cutting

[1][2][3] At the eastern end of the valley, Leighton Contractors Ltd. began work on three large cuttings near Toodyay.

At the Windmill Hill, where it had been planned to bore a tunnel, they had to drill and blast through solid granite rock to a depth of almost 35 metres.

Nearly half a million tons of rock were to be moved, yet only thirty men and a few large machines were used.The route became operational in February 1966.

[9] The Avon Valley cuttings had also uncovered sections of unstable rock, and effort was made to fix walls where required.

Due to the size of the cutting, the underlying geology is exposed to give a clear exposure of rock formations.