▁re open ed ▁and ▁a ▁new ▁ 9 0   inch ▁p ump ing ▁engine ▁was ▁purchased ▁from ▁Per ran ▁Found ry , ▁despite ▁there ▁being ▁many ▁second - hand ▁engines ▁cheap ly ▁available ▁at ▁the ▁time . ▁Only ▁seven ▁months ▁after ▁it ▁started ▁work ▁the ▁engine ▁was ▁up ▁for ▁sale ▁and ▁the ▁mine ▁had ▁closed ▁without ▁producing ▁any ▁ore ▁at ▁all . ▁ ▁In ▁around ▁ 1 9 1 0 ▁the ▁mine ▁installed ▁a ▁second - hand ▁ 8 5   inch ▁p ump ing ▁engine , ▁and ▁to ▁help ▁with ▁its ▁production ▁of ▁ar sen ic , ▁a ▁Brun ton ▁calc iner ▁was ▁built . ▁In ▁the ▁ 1 9 2 0 s ▁a ▁set ▁of ▁Californ ian ▁st amps ▁was ▁installed ▁to ▁re work ▁the ▁waste ▁d umps ▁for ▁ore . ▁During ▁the ▁Second ▁World ▁War , ▁ 2 , 5 0 0 ▁American ▁G Is ▁were ▁b illet ed ▁on ▁the ▁site ▁and ▁were ▁said ▁to ▁have ▁restart ed ▁the ▁ 8 5   inch ▁p ump ing ▁engine . ▁ ▁Pres ent ▁day ▁Today , ▁the ▁site ▁is ▁within ▁area ▁A 6 i ▁( The ▁G w enn ap - Ch ace water ▁M ining ▁District ) ▁of ▁the ▁Corn wall ▁and ▁West ▁Dev on ▁M ining ▁Land s cape ▁World ▁Heritage ▁Site . ▁There ▁are ▁good ▁remains ▁of ▁the ▁Brun ton ▁calc iner , ▁and ▁the ▁concrete ▁bases ▁of ▁the ▁Californ ian ▁st amps ▁are ▁prominent . ▁The ▁Min eral ▁Tr am ways ▁cycle ▁path ▁passes ▁the