$A260m nominal Net Present Value (NPV) project scoping
study released in March 2010.
In that study this number was the PRE-TAX CASH FLOW which is not a discounted value.
Try the April 2011 Feasability Study for more precise data.
http://www.asx.com.au/asxpdf/20110412/pdf/41y04z8r18yjcc.pdf