In the same period last year, before half-owner Barrick handed over operational control of the joint venture to Newmont in May, the iconic Kalgoorlie mine produced 124,000oz at an all-in sustaining cost of $US1131/oz. All-in costs fell 10 per cent compared to the December quarter, with production up 13.4 per cent. Newmont has flagged production of 700,000oz to 800,000oz from Kalgoorlie this year, at an average all-in sustaining cost of $US725/oz to $US775/oz. Production at Newmont's Boddington mine fell 7 per cent to 189,000oz, with average costs down slightly to $US767/oz. Newmont beat analyst expectations as it lifted production 3.3 per cent compared to the March 2015 quarter, to 1.23moz, and average group all-in sustaining costs fell 2.5 per cent to $US828/oz. Despite that, Newmont still booked a 20 per cent fall in adjusted net income, to $US182 million.