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Brazil's mining regulator states that the waste piles of Sigma Lithium do not pose an 'imminent danger'.

Brazil's mining regulator states that the waste piles of Sigma Lithium do not pose an 'imminent danger'.
Brazil's mining regulator states that the waste piles of Sigma Lithium do not pose an 'imminent danger'.

The agency said in a Monday evening statement that the waste piles of Sigma Lithium at a Brazilian mining site do not pose an "imminent threat" and the country's regulator for mining did not see the need to close them down during a recent visit. ANM's Technical Staff visited the mine in January, about a month after labor inspectors had shut down the piles because they warned of an "imminent and grave risk" for workers and local residents. Sigma's share price fell by 30% following the shutdown. The inspectors' decision was reported on January 15, 2019.

ANM's report does not change the Brazilian Labor Ministry's order, but it is a positive for the Toronto listed miner. It could be used as evidence to challenge the government of Brazil in a suit filed in early January by Sigma, which seeks an overturning of the closures at its waste heaps. The company announced Monday that they were resuming their mining activities at the Grota do Cirilo Mine in Minas Gerais. They had previously stated that the shutdown of the waste piles would not affect the schedule of resuming the production.

The firm had previously stated in documents submitted to the Labor Ministry that the loss of access to the piles could have "significant economic and operational impacts" as well as jeopardizing mining activities.

Sigma refused to comment due to "ongoing legal proceedings" in various jurisdictions.

BRAZIL'S LARGEST LITHIUM MINE

Sigma's Grota do Cirilo operation, its sole productive asset, is "Brazil's biggest lithium mine" with a capacity of 270,000 tons of lithium concentrat per year. It was inactive since October.

ANM said that during the visit its technical staff inspected the piles and reviewed the documentation provided by the miner.

In a press release, the ANM said that its technicians had not found any geotechnical anomalies that could indicate an imminent danger of global pile destabilization.

The agency did find some problems during its visit but added that it "did not see any reason" to "adopt precautionary measures like the closure" of the piles at the time."

ANM has informed Sigma that it lacks a surface water drainage system. However, the company added that this issue is not "associated with imminent risk", but rather a regulatory failure on the part of the firm.

A "partial rupture", as described by labor inspectors, was also dismissed at one of the waste heaps near an elementary school. ANM said the problem was "localized erosion" of a pile, which indicated "local stability" but did not pose an immediate threat to local residents. (Reporting and editing by Andrea Ricci; Fabio Teixeira)

(source: Reuters)