A comprehensive geotechnical investigation has been undertaken to assess the ground conditions at the Macquarie Point site. This investigation involved a detailed analysis of existing subsurface data and the completion of additional boreholes to provide a thorough understanding of the site's geological characteristics.​

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We have collected data from over 700 boreholes on site which have been consolidated into a 3D model.

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Latest Investigations:

• Drilled 20 new boreholes (2.7m to 28.82m deep), with 16 for geotechnical purposes and 4 to inform an acid sulfate analysis.

• Conducted 17 cone penetration tests (CPT) to measure soil properties, with depths from 1.46m to 11.2m.

• Collected rock and soil samples for lab testing, including soil chemistry, moisture content and rock strength.

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Site Conditions:

The site is divided into three zones:

• Northern Zone: Mostly loose fill over dolerite rock due to past quarrying.

• Central Zone: Flat dolerite with estuarine deposits and fill.

• Southern Zone: Deeper fill and alluvial deposits shaped by ancient river channels.

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Key ground layers include:

• Fill: Loose, unstructured material.

• Estuarine and Alluvial Deposits: Layers of sand, gravel and clay.

• Dolerite Rock: Hard rock that varies in weathering.

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These geotechnical investigations will help inform development across the site, including the Multipurpose Stadium, as set out in our integrated planning application, available here.