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One of the biggest holes in Brisbane's history is about to be dug in George Street.
From the huge excavation pit will emerge Brisbane’s new Queens Wharf casino, entertainment and resort complex, being built by the Destination Brisbane Consortium.
The excavation pit will be 26 metres deep, descending eight storeys into the earth and be Brisbane's biggest hole since the Myer Centre was built.
The Executive, Public Works and Neville Bonner buildings are all now in the final stage of demolition.
When their demolitions are finished, the excavation will begin.
Brisbane’s biggest excavation project begins in January, when final approvals are obtained from the Queensland government’s infrastructure think tank Building Queensland.
Basement structures for the series of buildings to be built on the site will be created first.
Destination Brisbane Consortium project director Simon Crooks said water, electrical and sewerage lines had been removed this year and the site was effectively disconnected.
Mr Crooks said the scale of excavation was unprecedented for a Queensland city centre.
“In total, more than 450,000 cubic metres of materials will be removed,” he said.
“This will be the largest city-based excavation project to occur in Queensland."
The hole will be one-third bigger than the excavation for the Myer Centre, which held the record at 375,000 cubic metres before the centre opened in March 1988.
The soil will be taken to Brisbane Airport, crushed and used under the new airport runway being built.
Mr Crooks said parliamentary workers, staff and students at Queensland University of Technology and public servants at 1 William Street would notice the huge pit as they travelled to work each day.
Probuild won the tender for the excavation work.
“We have now worked with them first-hand through the demolition work they are currently undertaking and have confidence in their ability to execute the excavation works package,” Mr Crooks said.
The excavation will be followed by foundation work.
The work space will be used as car parks for construction crews until the main part of the development is finished in 2022.
The Queens Wharf complex will include a casino, 50 restaurants and bars, 1000 hotel rooms, 2000 residential apartments and the Neville Bonner Bridge across to South Bank.