A WARKWORTH explosives company has been fined $460,000 after five cattle died – including a pregnant cow that aborted a dead calf – when toxic wastewater entered a farm dam. Dyno Nobel was convicted of a water pollution offence and breaching its licence after several failures in January, 2015 led to chemical-laden wastewater leaving two holding dams at its Warkworth site and flowing beneath a road before entering a nearby farm dam and stopping 200 metres from the Hunter River. The company, which was founded by Alfred Nobel who later gave his name to the Nobel Prize, entered guilty pleas during a NSW Land and Environment Court hearing after action by the NSW Environment Protection Authority. The court heard a farmer moved between 60 and 80 mainly pregnant cattle on to a paddock next to the Warkworth Dyno Nobel site that he had leased since 2009. He moved the cattle on February 20, 2015 and returned four days later. The farm dam was the only source of water within the leased paddock area. The court heard when the farmer returned four days later five cattle were dead, and one of the dead cows had partly aborted its calf which was also dead. “The dead cattle…