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Motorway drilling work steps up

14 February 2022

A new round of ground investigations is underway in preparation for construction of the congestion-busting $9.9 billion Torrens to Darlington (T2D) Project.

The Phase 3 works – to be carried out by contractor Aurecon Australasia between February and approximately mid July 2022 – will see approximately 200 holes drilled mostly along the northern section of the road corridor, between the River Torrens and Anzac Highway.

This follows on from Phase 2 works in May-December 2021, which involved 171 boreholes being dug in the vicinity of the southern section, from Anzac Highway to Darlington.

The combined depth of those southern boreholes was more than 4.3km – roughly the distance between the Glenelg and Brighton jetties.

The continuing investigation of below-surface earth and groundwater enhances the T2D Project’s understanding of the geotechnical and hydrogeological conditions to be encountered when two sets of twin three-lane tunnels are built for the motorway.

Once finished, the T2D will provide for a traffic light-free, 10.5km drive between the River Torrens and Darlington, completing the final section of the 78km North-South Corridor connecting Gawler to Old Noarlunga.