The British Geotechnical Association (BGA) is the principal
association for geotechnical engineers in the United Kingdom.

John Mitchell Lecture 2018

BGA Meeting
  • Tomorrow 18:30
  • Tomorrow 18:30 - 20:00
  • Institution of Civil Engineers, Telford Lecture Theatre
  • Organiser: British Geotechnical Association
  • Download to Calendar
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The John Mitchell Award Lecture 2018

Wednesday 24th January 2018 at 18:30 hours
Institution of Civil Engineers, One Great George Street, Westminster, London SW1P 3AA

Re-thinking Site Investigation
Design, Practice and Procurement

The 2018 John Mitchell Lecture will be delivered by Len Threadgold from Geotechnics Ltd on the topic of "Re-thinking Investigation".

The ground is the greatest unknown in all construction projects so knowledge of its characteristics is key to efficiency, sustainability and safety of design and construction. The ground and structure need to interact so the scope and form of investigation needs to match the structure’s specification. Better recognition of this by Clients, Engineers and Funders is needed. Re-thinking site investigation design, practice and procurement would go some way to achieve this and encourage quality from and for experienced professionals. Structures are specified; the ground is inherited, so collaboration between the designers and investigators is needed to balance expectation.

The techniques used within the site investigation industry have many experienced practitioners and their knowledge is essential to optimise investigation in the context of the site geology, its access constraints and the desired information. Site Investigation is site-specific R&D and a process that extends from initial concepts, through phased investigation work and construction to project completion and beyond. The investigation product is data that needs to be available for efficient use by designers. Adoption of the AGS Format for data transfer, assimilation and storage is allowing better and more rapid use of all the data and can satisfy BIM requirements; awareness of this innovation is vital to progress.


Len Threadgold graduated in Civil Engineering from Liverpool University and, following research there, worked on airfield and bridge design and on construction sites. Since 1965 he has been deeply involved with the investigation of the ground onto, into or below which all Civil Engineering work is constructed; this is his passion. In 1979 he set up his own consultancy in Site Investigation and Geotechnical Engineering, expanding it to establish a consultancy in Hong Kong.

Len has been Chairman of the ICE West Midlands and the Midland Geotechnical Society, and has served on the Géotechnique Advisory Panel and the committees of the BGA and AGS. He stimulated and chaired the working party that produced the AGS Format for software-independenttransfer and storage of data on ground conditions. He has written numerous articles and papers and has delivered many presentations to professional groups and Universities.

In 1983 he established Geotechnics Limited and continues to work at their office in Coventry. The Company undertakes Site Investigations and provides Geotechnical Advisory Services. It is a leading independent specialist with additional offices in Chester, Exeter and Yorkshire.

Download the flyer here

This is a free event but attendees should register in advance here

Please join us after the Lecture for drinks sponsored by

Disclaimer: Any views or opinions expressed on any matters by the presenters or participants during or in connection with any presentation are solely the views of the authors
of the respective comments and/or opinions and must not be taken to be the views of ICE or the British Geotechnical Association or any other organisation. ICE and the BGA
make no representations, warranties or assurances concerning any information provided in these presentations and accept no responsibility for the content and/or accuracy.

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