bn CASE STUDY ––––––––––––––––––––––––– CAVAL RIDGE MINE Central Queensland, Australia TerraPlus® Dump Structure Owner: BHP Billiton Mitsubishi Alliance (BMA) Contractor: Abigroup Engineer: Bechtel Construction: January 2013 – December 2013 Background The BHP Billiton and Mitsubishi Alliance (BMA

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