Ian R Brown Associates Ltd

IRBA petroleum activities

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Geological and geotechnical engineering studies have been carried out for civil, mining and petroleum projects in New Zealand. Our work in other countries has been associated with large tunnelling projects.

Our expertise covers:
  • site investigation and characterisation
  • slope stability
  • design of slope retaining structures
  • geotechnical aspects of earthquake engineering
  • investigation and design of underground structures
  • provision of expert evidence



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Geological and geotechnical engineering projects are led by Dr Ian Brown, CPEng. P.E.. He has 30 years experience in this area. He is able to draw on further specialist knowledge from Drs Pyke and Larkin as required. He is also supported by staff at IRBA who provide valuable input to engineering projects as required.

Geotechnical Publications


Software links:

  • Tagasoft - geotechnical engineering software.