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

Descriptions

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.