RE:KozmoUm, it wasn't me that said the old miners might have only left between 10% and 20% in the tailings (not the 50% the pumpers were pushing) ... it was Bob Moriarty in his article. And it was the company themselves that pegged the total volume at only around 25,000 cu yds, a small fraction of what they had originally estimated.
Not sure how that went over your head.