Harrison Group Environmental designed the investigation based on a scope of works provided by the Client. Fieldwork was carried out over a period of three months including access by boat to the intertidal area within The Wash. Intrusive investigation included cable percussive boreholes, cone penetration testing and trial pits. Samples were taken to assess geotechnical properties of the soils. Geophysicl analysis included thermal resistivity of the soils and seismic refraction/ reflection to determine the underlying geology of the salt marsh which was inaccessible to plant. Utilities surveys were also carried out at each of the proposed crossings. As part of our duties as Principal Contractor we put together a detailed Health & Safety plan which covered all aspects of t

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