This is the latest that I could find on Savannah. So the ore...

This is the latest that I could find on Savannah. So the ore grade there makes the reserve currently worth close to $500/tonne. The mine struggled to make money when it opened last time, so it shut after a while. They are going to give a go again though with the higher metal prices that will hopefully keep rising. My rule of thumb is that if the value of ore being mined undergrand is at least the equivalent to the value of 8 grams of gold per tonne there should be no worries about profitable mining.