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.