Heap Leach Pad Long-Term Liability explored

A short note on another of those mining oddities one finds in a day of surfing Google for serious information.  Form Sinclair Knight Mertz (SKM) is this short piece on Heap Leaching - Limiting Long-Term Environmental Liability.   A nice collection of deep technology and engineering, with an added touch of doubt and concern.  Required reading if you or yours are about to build or approve a heap leach pad.