Do we know how deep CHNs open pit goes? Is this really 630m...

Do we know how deep CHNs open pit goes? Is this really 630m deep? I might be way too optimistic here but if POD could plan a similar open pit scenario (down to 500-600m) across the whole 15km of the reef, and our mineralisation extends at depth, we could have a pit constrained resource of over 10Moz 3PGE (and that's without Rhodium and Iridium, Copper and Nickel). Is such depth for the POD pit possible, with our additional Rhodium and Iridium and base metal credits to make this economical as open pit?