Aurizon on a roll with landmark BHP deal AURIZON has secured one of the largest coal haulage contracts signed in the Australian market in the last decade, ending more than a year of negotiations with major customer BHP Billiton. Australia's largest rail freight company yesterday said it had finalised a new, long-term, performance-based contract to transport up to 65 million tonnes of coal each year from BHP's joint venture projects, which it operates with Japan's Mitsubishi and Mitsui, in Queensland.