ATC Williams was engaged to undertake the detailed design for the decommissioning of two Tailings Storage Facilities no longer operational (estimated combined area of 150ha) at the Rio Tinto East Weipa bauxite mining operations located in northern Queensland.
The scope of work required a detailed site investigation that consisted of CPTu testing, VWP monitoring equipment installation to understand site conditions and material types and a detailed environmental field investigation considering agronomy and fauna and flora within the area.
The design was completed in two stages:
The Stage 1 design was completed and included a final design report, Investigation report, construction drawings, associated quantities and technical specifications. Only conceptual figures were prepared for Stage 2.
The main challenges faced during the project included: