Thanks, I did go back and listen again to what the Bingham Canyon geologist said. Talk about subtle sarcasm. He said, "Jim, this is the doggiest... project I've ever seen. Why there isn't even room to hold the Bingham Canyon mine."
My tiny brain had to try and substitute some more generally known area like, "Jim your quarterback is the doggiest QB I've ever seen. Why he isn't even as good as Peyton Manning." But then following through with this, Jim adds the equivalent to saying, "Later we found that our QB was actually superior to Peyton Manning."
Perhaps an exaggeration, but if HM could actually be bigger than the current biggest, maybe not.