SAR isn't really running out of ore in the short term.
According to current corporate president, TBO, Kailis and bannockburn Deposits have 15.8Mt of reserves, put through a 2.4Mt per annum mill (TBO) and you get 6yrs of current mill feed...without BGH dirt.
That's the reserve component of their combined 65Mil tonnes resource base around TBO currently containing 3 million ounces.