.3 g/m3 This was the official calculation for dlkm's tiny resource. the video of the geologist who did it said it was supportable, but on the very low side. Of course, being alluvial, there'll be hi and low and no spots. I believe one of Bob Moriarty's guys on the ground reported .5 g/m3 and based upon rbyc's front page article production estimates of last October and my guesstimate of how many hours of work per month (260) with one shift, I came up with .56 g/m3.