As a guess the haulage & treatment cost per tonne to Carosue, after met recovery & terms of the ore purchase I'm going to say at least $50 per tonne or say 1g Au?
If the grade of any prestrip isn't above that 1g/t marginal cutoff then no point sending it to Carosue, makes no money.
Mining cost probably another $50 per ore tonne?? at least so any ore needs to be above 2g/t to be break-even.
C'mon HAW get to the grade!
Hardrock
Ann: HAW - June 2018 Quarterly Activities and Cashflow Reports, page-6
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