Fosterville (KLA) is the biggest producer in Vic with about 275k-300k oz/yr and growing quickly (aiming at 400,000 pa.) It still has a ways to go to catch the other two though.
Fosterville could probably produce a lot more if it had some ELs in the Waranga Province but NAGs already has those in their bag. Unless of course they were to come after NAGs to make a deal or go for a Joint Venture.
