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Geotechnical works begin for Sydney Metro West

Geotechnical investigations are underway along the length of the Sydney Metro West alignment to help inform the final design of the tunnels and station boxes.

Geotechnical investigations are underway along the length of the Sydney Metro West alignment to help inform the final design of the tunnels and station boxes.

More than 50 bore holes are being drilled, ranging in depth from 10 metres to 100 metres.

The drilling reveals the depth of each layer of soil and rock, the properties and strength of the soil and rock and the type of soil and rock in each location. This can help to determine if it is Ashfield Shale, Mittagong Formation or Hawkesbury Sandstone.

Geotechnical work has also been done at the White Bay Power Station, including inside the turbine hall and boiler room.

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The Sydney Metro West tunnel alignment runs about 22 metres under the power station, which was built in 1917 and decommissioned in 1983.

The heritage-listed power station was the longest serving Sydney power station and is the only one to retain a representative set of machinery and items associated with the generation of electricity in the early and mid-20th century.

It’s also been used as a set for films like The Matrix Reloaded and The Great Gatsby.

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