"JB noted a Bingham-like footprint.  That'd be a lot of copper!"

Yes, I recall JB making that comparison about the footprint.  But more important than that is grade and mix.  In that regard, we should hope to be more like Bisbee than Bingham.

Bisbee was primarily copper-gold-moly, while Bingham is copper-moly-gold.  More importantly, if I recall correctly, the Copper Queen at Bisbee had copper grades running as high as 19-21 percent.  I don't think Bingham ever exceeded a tenth of that.  [And the abandoned pit at Bisbee still contains economic grades of copper by today's standards, but getting back into production is too costly at present.]

My point is that "footprint" is a minor consideration.  Nothing in mining carries much value beyond ten years of anticipated production - the higher the grade and the better the mix, the higher the value reflected in the stock price under various conditions as anticipated over ten years. 

Here is a case where size does not matter - grade is everything.  And I think we will see blow-out grades if/when drilling encounters the skarn we hope is there.  If so, the deeper porphyry will not need to be part of a value consideration for decades.