EFFICIENCY It’s also very efficient. It is based on the concepts of rectangular stockpiles, overhead stockpiling conveyors, underground reclaim and bulldozers fitted with coal blades. The ship loader and associated wharf can quickly turnaround vessels up to small Cape size. A modern and extensive rail network and the fact that Brisbane is the closest Queensland port to a major coal source also help boost efficiency. All the coal handled by QBH is transported by Queensland Rail. Unit trains carrying 1,900 tonnes of coal can be typically unloaded and stockpiled in approximately one hour.