I would assume that it would at the minimum be rail from Kal. Almost certainly be rail from Leonora (or even Menzies; re-ballasting has to be relatively cheap). The only question is if they build out rail further North, and if so how much. Private haul roads are going to be much lower CAPEX, but debt at the moment is dirt cheap, if they can drop their OPEX enough it'd be amazing.
GWR Price at posting:
38.5¢ Sentiment: Buy Disclosure: Held
