Vale joins other major mining companies in releasing detailed information on its tailings storage facilities. Sossego Copper Mine pictured above. Courtesy of Vale.

Vale has released a detailed report on all of its tailing storage facilities on Monday, joining a number of fellow major mining corporations in doing so.

In response to a demand from institutional investors in April, a growing number of companies including Glencore, Vale, BHP,  Anglo American, Newmont Goldcorp, Barrick and Teck have released their information online, either in the form of open documents, or on searchable . The request came from the Church of England Pensions Board and the Council of Ethics of the Swedish National Pension Funds on behalf the Principles of Responsible Investment (PRI), the signatories of which manage over US$10 trillion in assets. Miners were given 45 working days to disclose a listing of all their tailings facilities closed or active, so that investor could better appraise the risk that these facilities represent.