Production at the Wheelarra/Jimblebar mine complex first commenced in March 1989 but then moved to the Wheelarra mine before a newly commissioned Jimblebar mine commenced production in Q3 2013. The production ramp up at Jimblebar has been faster than anticipated and further production increases are expected annually with the mine reaching 35 Mtpa in 2020. This a key goal BHP achieving total annual production of 290 Mtpa. C1 cash costs at Jimblebar are estimated to have fallen from US$33/tonne in 2013 to US$15/tonne in 2017 through a combination of overhead reductions, equipment standardisation, productivity gains and in the case of Jimblebar, incremental production. Further increases to annual production at the Jimblebar site will further reduce costs in 2017 and 2018 although we expect inflationary pressures to start to impact from 2019.
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