• A new database called the Global Tailings Portal pulls together information on 1,700 dams that store waste, or tailings, from mines around the world
• Around 100 publicly traded companies have shared information about their dams with GRID-Arendal, the Norwegian foundation that developed the database
• The portal’s creators say that much of the information, including the size, location, and risk factors associated with the included dams, hasn’t been publicly available before, even as catastrophic dam failures continue to occur
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The database is aimed at investors, as well as communities, companies and regulators.

“With this information, the entire industry can work towards reducing dam failures in the future,” Baker added.

Estimates vary widely about the number of tailings dams that exist around the world. GRID-Arendal figures there are somewhere between 3,500 and 33,000 active and inactive dams, including a number of “orphaned” dams where it’s not clear who is responsible for ensuring they don’t threaten local communities and ecosystems. Baker also noted that the characteristics of dams and what they contain have changed over time, increasing the need for more transparency.

“Dams are getting bigger and bigger,” Baker said. “Mining companies have found most of the highest-grade ores and are now mining lower-grade ones, which create more waste.”

A 2017 report by GRID-Arendal and the United Nations Environment Programme aimed to assess the risks from the ballooning number of tailings storage facilities. It laid out how climate change has altered the calculus on what types of structures can withstand expected weather patterns and how long the dams are expected to last. But GRID-Arendal said that much of the data necessary for that report wasn’t readily available. That gap led the authors to recommend the development of a resource along the lines of the mine tailings portal. Around 100 publicly listed companies of the 727 contacted after the Brumadinho disaster turned over information on their tailings dams. The portal now allows users to see where around 1,700 are located, which company owns them, and the severity of the consequences if they fail.

“Most of this information has never before been publicly available,” Kristina Thygesen, who leads GRID-Arendal’s geological resources program, said in the statement.

The organization plans to continue to gather information from mining companies, including privately held ones.

The team also plans to incorporate satellite monitoring of existing dams.

“This database brings a new level of transparency to the mining industry which will benefit regulators, institutional investors, scientific researchers, local communities, the media, and the industry itself.”

  Originally published by Mongabay.