The City of Sydney has announced that construction work on a major new flood alleviation scheme is now underway.
When complete the tunnel will transfer up to 30,000litres of stormwater per second from the Green Square district when flood waters can reach depths of up to 2m.
Three tunnel boring machines will be used by contacting joint venture DG Alliance,which has been formed by Sydney Water, the City of Sydney, UGL Engineering, Seymour Whyte Constructions, Parsons Brinckerhoff Australia and RPS Manidis Roberts.
According to a statement from the City of Sydney, much of the 2.4km route from Link Road to Alexandra Canal runs through or under property owned by the city and the route was chosen to minimise the impact on residents, businesses and the environment.
The tunnel is due to be completed in 2017 and will allow a new town centre for Green Square to be developed.