▁Other ▁elect row in ning ▁operations ▁followed , ▁including ▁Gib ral tar ▁M ines ’ ▁Mc Le ese ▁Lake ▁operation ▁and ▁Mag ma ▁Co pper ’ s ▁San ▁Manuel ▁co pper ▁mine ▁in ▁ 1 9 8 6 , ▁the ▁Mex icana ▁de ▁Can ane a ▁operation ▁in ▁Mexico ▁in ▁ 1 9 8 9 , ▁and ▁the ▁Gun pow der ▁Co pper ▁Limited ▁operation ▁at ▁Gun pow der ▁in ▁north - west ▁Queensland ▁ 1 9 9 0 . ▁These ▁operations ▁did ▁not ▁suffer ▁the ▁ch lor ide ▁cor ros ion ▁problems ▁experienced ▁by ▁B H AS . ▁ ▁The ▁development ▁of ▁the ▁K idd ▁Process ▁technology ▁ ▁Fal con bridge ▁Limited ▁in ▁mid - 1 9 8 1 ▁commission ed ▁a ▁co pper ▁sm elter ▁and ▁ref in ery ▁near ▁T imm ins , ▁Ontario , ▁to ▁treat ▁concent rate ▁from ▁its ▁K idd ▁Mine . ▁However , ▁at ▁the ▁out set , ▁the ▁quality ▁of ▁the ▁c ath ode ▁co pper ▁produced ▁in ▁the ▁K idd ▁ref in ery ▁suffered ▁from ▁the ▁presence ▁of ▁higher ▁than ▁usual ▁concentr ations ▁of ▁lead ▁and ▁selenium ▁in ▁the ▁co pper ▁sm elter ’ s ▁an odes . ▁K idd ▁c ath ode ▁co pper ▁was ▁not ▁able ▁to ▁meet ▁its ▁customers ’ ▁specific ations ▁and ▁obtain ing ▁product ▁cert ification ▁for ▁the ▁London ▁Metal ▁Exchange ▁( “ L ME ” ) ▁became ▁a ▁key ▁focus . ▁ ▁After ▁several ▁process ▁improvements ▁were ▁inst ig ated , ▁it ▁was ▁ultimately ▁real ised ▁that ▁the