The Mining and Energy Union has accused Rio Tinto of seriously downplaying the risks posed by this week’s automated train crash in the Pilbara, including its concerns about spilled diesel contaminating water supplies. The Mining and Energy Union has accused Rio Tinto of seriously downplaying the risks posed by this week’s automated train crash in the Pilbara, including its concerns about spilled diesel contaminating water supplies. Rail Accidents and Incidents, Mining and Metals Industry, Regional Communities, Unions Latest business news