David M Chambers, "Long Term Risk of Releasing Potentially Acid Producing Waste Due to Tailings Dam Failure". Center for Science in Public Participation. Page 3 of 12. CSP2.org
Lindsay Newland Bowker and David M Chambers, 2015. csp2.org
Source gives amount as 28 million tonnes. See also the CSP2 table of tailings dam failures, lines 375-6, which gives a conversion factor of 1.6 (volume/mass).
Catholic Bishops Conference of the Philippines and others, September 2012. "The Philex Mine Tailings Spill Of 2012: An Independent Fact Finding Mission Report", p 18/26, cites Philippines DENR as estimating the stored tailings mass as 163 million tonnes. Specific gravity of tailings is typically about 1.6 according to Centre for Science in Public Participation, "Tailings Dam Failures, 1915–2016", op. cit. Accessed July 2018.
J L Macias, P Corona-Chavez, and others, 2015. "The 27 May 1937 catastrophic flow failure of gold tailings at Tlalpjahua, Michoacán, Mexico", Natural Hazards and Earth System Sciences 15, pp 1069–1085. AbstractFull pdf The document is open source. Retrieved June 2018.
International Commission on Large Dams (ICOLD), 2001 Tailings Dams Risk of Dangerous Occurrences P 95. Gives storage and released amounts both as 80 million tonnes. Accessed July 2018.
Wise Uranium, "Chronology of Major Tailings Dam Failures" (2018) gives release size as 28 million tonnes. Thus the volume would be 28 million cubic metres if it was all water, and more if the release included tailings solids, which is likely.
