Electricity Alliance West (EAW) were refurbishing and upgrading two parallel 400kV overhead power lines running between Pembroke and Swansea substations in South Wales. CGL were instructed to undertake a desk study and a geotechnical walkover survey along the 131km stretch of overhead lines. Combining the desk study report with the findings from the geotechnical walkover survey, enabled CGL to identify the potential geotechnical risks on

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