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interesting question Paul, but no detail from the company. Just looked up the elevation profile of the pit at Iron Knob in Google earth. If that is the one they are thinking of using, looks like they have almost 200m of head to play with, depending on where the top dam goes (and there is already water of some sort in the pit, so maybe it is either waterproof or has a potentially helpful water-table).
Last edited by Shiraz; 02-11-2017 at 09:06 AM.
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