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Diamond days for company near T2D corridor

21 March 2022

A local Adelaide business that exports diamond drill bits all over the world has seen its product in action virtually right on its doorstep as part of crucial ground investigation works for the Torrens to Darlington (T2D) Project.

Staff at Hardcore Diamond Products discovered that their product was being used to drill bore holes just metres away from the company’s high-tech factory in Melrose Park.

In a first for many of Hardcore’s 30 employees, they were able to walk down Ferry Avenue and safely observe one of their hand-made drill bits being used at the end of the street.

The diamond bit started taking effect only when the bore hole reached rock at a depth of 38 metres, after initially drilling through soft clay and dirt.

The General Manager of Hardcore, Paul Brown, said it was rare to see the company’s product in action because about 50 per cent of it went overseas and only a tiny portion was used for the type of geotechnical works being carried out by the T2D Project.

“Although we’ve been designing and supplying diamond drill bits for nearly 20 years, the location of our customers and the nature of mining projects means our people don’t often see where and how their sophisticated products are actually put to use,” Mr Brown said.

“Some of our drill bits are used at Roxby Downs in South Australia’s north, but that’s a long way for our Adelaide staff to travel to see them in action.

“So it’s really terrific that – just by chance – our work has come home to our doorstep in Melrose Park and we’ve all had the opportunity to see, first hand, our expertise playing a role in a huge engineering project of statewide significance.”

The recent work at the intersection of Ferry Avenue and South Road was just one of about 200 holes planned to be drilled, between February and July 2022, as part of Phase 3 of the T2D Project’s ground investigations program, mostly along the northern section of the corridor.

The ongoing 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.

Hardcore Diamond Products ground investigation site visit