ST
The 18 klm's is for the new port in the link..
The big boy will be between Irvine and Cockatoo..
It is 6 klm's between Irvine and the shiploader on Cockatoo.
The orebody on Cockatoo is 1 klm long, so at a guess it would be two maybe three klm's.. not far anyway..
Cheers ..