General chit chat, page-132

cats that's a small hole.  A few hours work for a dragline. That's the beauty of that kind of deposit. Easily worked by big machinery.
You might want to consider that it's cubic metres not square metres though. 
Otherwise it's quite good and reflects the value in this resource starkly. 
supply will eventually catch up with demand in cobalt especially once market saturation happens and battery recycling becomes a viable option. Until then , maybe 30 years away this Joyce mine will bring us much joy in my opinion.