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Established 2004

Ruddlesden geotechnical

Ruddlesden geotechnical provides ground investigation, geotechnical consultancy and contamination assessment services.

Based in Exeter, but covering the whole of the UK, albeit primarily concentrated in the South West, Ruddlesden geotechnical was formed in 2004.

Ruddlesden geotechnical works on behalf of a wide client base, including local, regional and national housing developers, housing associations, commercial developers, building contractors, structural and civil engineers, architects, building consultants, quantity surveyors, local authorities and private individuals.

Development projects range from single dwellings and extensions to large housing estates, multi-storey flats, offices, industrial units, roads, slopes, schools, hospitals and basements.

The services and projects listed on this web-site provide an indication of those undertaken by Ruddlesden geotechnical, but others are carried out. If your requirement is not readily identifiable on this web-site, please contact us as we may still be able to help you.

  • AGS
  • Constructionline
  • CSCS
  • SMAS
  • ECFC trust

Latest news

Recent projects

  • Latest news

    16 Apr 2026

    Coastal Slope Stability Assessment

    Geoff Davis has recently been in his element, carrying a slope stability assessment for a holiday park that has recently seen some quite dramatic ground movements.One thing that this project has highlighted is that for all the new technologies that are available to help us understand the ground, including LiDAR, drone surveys, remote sensing and inclinometers, all of which we intend to use on this site, they are of little use if the ground model is not understood. And this understanding of geology and geomorphology only come from a combination of education and experience.It is hoped that our understanding of the landslide processes at this complex site will allow us to predict possible future behaviour and assist in developing a long-term strategy for the future of the holiday park and its management.

    Coastal Slope Stability Assessment
    Coastal Slope Stability Assessment

  • Recent projects

    Soakaway Drainage Feasibility Assessment, Cornwall

    Soakaway drainage, combined with sustainable drainage systems (SuDS), was proposed as a means of surface water drainage at a proposed residential development site in Cornwall. Soakaway testing and assessment was as a pre-commencement planning requirement. In order to provide soil infiltration rates for preliminary design, in-situ soakaway testing was undertaken in accordance with BRE DG 365. Close liaison with the consulting engineer ensured that the test locations were targeted at key locations and depths across the site. In addition to considering the infiltration characteristics at the site, as parts the site were relatively steeply sloping, a slope stability assessment was undertaken, to assess how soakaway drainage might affect slope instability; soakaways had to be carefully sited as a result of this. Long-term groundwater level monitoringwas also undertaken to demonstrate that the seasonal high groundwater table would not rise above the base of the soakaway.

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  • Recent projects

    Boreholes for Retaining Wall, North Devon

    To aid the design of a large retaining wallat a former glove factory in North Devon, Ruddlesden geotechnical were commissioned to undertake a geotechnical investigation to provide information on the ground conditions. Combined percussive and rotary drilling was undertaken, to obtain sufficient samples of the near surface soils and deeper rock materials, which could not be readily sampled using percussive or rotary methods in isolation. Cost (and time) savings were made by only mobilising one drilling rig, rather than have undertaken separate phases of investigation for the sampling of soils and rock materials. Photograph of the completed project, courtesy of the architect – Woodward Smith.

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