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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

    13 Jul 2026

    Geoff’s birthday treats!

    We recently celebrated a special birthday of Geoff Davis, in a place that is close to his heart: the East Devon coast.He treated us to his knowledge of the geology and landslide systems in the area, and we treated him to an ice cream on the beach!

    Geoff’s birthday treats!
    Geoff’s birthday treats!

  • Recent projects

    BRE DG 365 Soakaway Testing, Cornwall

    In-situ soakaway testing was undertaken in accordance with BRE DG 365, as part of a wider geotechnical investigation and contamination assessment for the residential redevelopment of land near Newquay, in Cornwall. The testing was undertaken using machine-excavated trial pits, with a tractor-towed water bowser used to provide the large volumes of water required for testing. Where practicable, Ruddlesden geotechnical use local plant hire firms and agricultural contractors for all of our ground investigation work. Ruddlesden geotechnical worked closely with the consulting engineers to ensure that sufficient information was provided for surface water drainage design. Due care was taken to appease local stakeholders, siting the test locations to minimise excessive disturbance to existing agricultural land and ensuring that all test locations were reinstated with the upmost care to mitigate against any future damage to agricultural plant and/ or livestock.

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  • Recent projects

    P20 Groundwater Risk Assessment Demonstrates No Remediation Required

    At a former engineering works near Exeter, elevated levels of polyaromatic hydrocarbons (PAH) and total petroleum hydrocarbons (TPH) were recorded in both the soil and groundwater beneath the site. As screening criteria had been exceeded in the groundwater beneath the site for these contaminants, further assessment was required to ascertain whether the recorded levels of contaminants beneath the site could migrate to off-site receptors, e.g. to a nearby river, and cause unacceptable levels of pollution to the water environment. Remedial targets were calculated using the Environment Agency’s Remedial Targets Worksheet (P20 assessment). In this instance, the recorded values were below the calculated remedial targets and the risk assessment demonstrated that unacceptable pollution was unlikely to occur to controlled waters, as the levels of contaminants on-site were modelled to have diluted by natural attenuation and dispersion processes before reaching the receptor. No further assessment or remedial works were considered to be necessary. This was agreed with and accepted by the Environment Agency.

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