Production drilling is carried out by either Tamrock Data Solo or Atlas Copco production drill rigs. Blastholes typically range from 105 to 27 mm for downholes and 89 to 105 mm for upholes. In the lower area and the lower parts of the Southern Cross, a burden of 2.5 m is used with a typical toe spacing of 3 m. In the Upper nd Upper Southern Cross areas, the burden is 3 m