A465 Heads of the Valleys Dualling Abergavenny - Hirwaun - Sct 5 & 6 – Advance Ground Investigation

Tender description

The Works comprise of ground investigations for the proposed dualling of the A465 Trunk Road between Dowlais and Hirwaun. The investigation comprises a combined geotechnical, geo-environmental and groundwater investigation. The scope of the investigation shall include, but not necessarily be limited to the following: - Hand excavated inspection pits to confirm the absence of services; - Boreholes drilled using both cable percussion and sonic drilling techniques in the superficial deposits followed by rotary drilling in rock. - Enabling works including construction of temporary access to borehole locations; - In situ (SPT) testing within boreholes; - Installation of Gas & Groundwater monitoring standpipes; - Logging of all boreholes and inspection pits. - Collection of soil and rock samples for Geotechnical testing; - Collection of soil, rock and water samples for contamination testing; - Geophysical survey of the Bryn Cartref landfill using a combination of Electromagnetic conductivity and resistivity/seismic profiling; - Clearance of potential UXO using specialist down-hole magnetometry techniques; - Geodetic surveying of all exploratory hole locations; and - Factual reporting to be produced by the Contractor upon completion of site works and laboratory testing, including provision of digital data in AGS format.