UPDATE 4-Samarco dam failed due to poor drainage and design -investigation

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UPDATE 4-Samarco dam failed due to poor drainage and design -investigation

UPDATE 4-Samarco dam failed due to poor drainage and design -investigation
BELO HORIZONTE/RIO DE JANEIRO, Aug 29 (Reuters) - The deadlycollapse of a tailings dam last **vember at the Samarco mine,owned by Vale SA and BHP Billiton, was causedby drainage and design flaws,...

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