Tillegra Dam
Example of geotechnical report

The GGRD is a collaborative multi-year project that aims to collate, store and provide access to NSW government geotechnical reports and data. The project will:

  • create a new geotechnical report collection in our DIGS® document archive
  • add a new geotechnical report view in our MinView web mapping application
  • establish procedures for receiving reports and data from government agencies
  • harvest geotechnical data
  • develop 3D geotechnical models.

Geotechnical investigations

  • In NSW, geotechnical data about Earth’s subsurface (mainly rock and soil strength) is generated through mandatory investigations to support public and private infrastructure projects. This information is critical to infrastructure planning, design, construction and asset protection or maintenance.
  • To date, maintaining a record of geotechnical data and re-using the information has been a key challenge for government agencies. Geotechnical investigations are conducted by multiple agencies in NSW but there has been no central repository or access to these reports and associated data.
  • With the vast increase in construction and infrastructure spending, including the recently announced NSW Government commitment to invest $87.2 billion on infrastructure over the next four years, we urgently need to manage this data.


GSNSW, as custodian of the state’s geological knowledge, has established the NSW Government geotechnical report database (the GGRD) to archive data and make it available. Data is being sourced in collaboration with a range of NSW Government agencies including Public Works Advisory, Sydney Water, Roads and Maritime Services, Sydney Metro, Sydney Trains and Australian Rail Track Corporation.

Project phases

GSNSW recently completed Phase 1 of the GGRD. We’ve uploaded around 3400 Public Works Advisory reports into a new geotechnical collection in DIGS® and created a new geotechnical report view in MinView. During Phase 2 GSNSW is working with other NSW agencies to upload their data by June/July 2020.

A long-term aim is to use the data to generate 3D geological models of cities, towns and proposed major infrastructure corridors to assist scoping and planning projects.