Really, without every tiny bit of information and a reliable number for minerals on the ENTIRE district, trying to figure NPV is only a "guesstimate", or basically an educated guess. Trying to come up with a good number myself, has been like trying to beat my brains out with a feather. I have to agree with everyting everyone has posted. No one can emphatically say whether they are right or wrong. I give an "attaboy" for the effort, and 5 stars and a thumbs up! Good job all