Calidus Resources’ PFS for its flagship Warrawoona gold project located near Marble Bar, WA, will churn out $61m per annum in free, pre-tax cashflows over an initial mine life of six years. Based on an AUD$1,800 per ounce gold price and production of about 100,000 ounces per year through a conventional 2Mtpa plant, the project has an estimated pre-tax NPV of $151m and an IRR of 40%, with payback in two years.