Brazil braces for another tailings dam collapse

phys.org | 1/25/2019 | Staff
cute16 (Posted by) Level 3
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Thousands of Brazilians braced Monday for the possible collapse of another tailings dam owned by mining giant Vale that threatens to spew millions of tons of toxic sludge over towns, rivers and forest.

The latest emergency comes four months after 242 people were killed when a dam burst at another Vale-owned mine.

Vale - Emergency - Services - Section - Gongo

Vale and emergency services have warned that a section of the defunct Gongo Soco mine in the southeastern state of Minas Gerais is at risk of disintegrating, which could rupture the Sul Superior dam 1.5 kilometers (nearly one mile) away.

More than 400 people living around the dam, which holds nearly seven million cubic meters (247 million cubic feet) of mining waste, were evacuated in early February after monitoring systems detected abnormal movement in the northern slope of the mine, which was closed in 2016.

Slope - Centimeters - Inches - Year - Months

The slope usually shifts about 10 centimeters (four inches) a year, but that has accelerated in recent months. In the past few days it has topped 20cm a day, local media reported Monday.

Around 6,000 inhabitants in Barao de Cocais municipality who are living in the so-called secondary safety zone have been on high alert,...
(Excerpt) Read more at: phys.org
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