UPDATE 1-Brazil state could ban dam design used at Samarco mine
July 20, 2016 at 12:54 PM EDT
RIO DE JANEIRO, July 20 (Reuters) - A Brazilian state law to ban upstream tailings dams, the design used at a dam that collapsed at the Samarco iron ore mine in November, could be approved this year, an environmental official for the state of Minas Gerais told Reuters on Wednesday.