...adding here some minor details.

From '75 the Twin Buttes open pit operation produced copper averaging around .6 percent copper. Among byproducts was uranium, making more than 750 lbs daily of yellowcake circa 1980.

Interestingly, underground tours at Bisbee were suspened for a while owing to high levels of radon, which comes for decaying uranium, something unkown going into the closing of operations in '75.* Uranium by itself may not exist in sufficient quantities to justfy restarting operations in Bisbee, but it may, especially if approriate quantities of rare earths are also found in old piles of mine waste.

The prospects for finding uranium at Hay Mountain, I think, are probably good, but only as a minor byproduct, so nothing to get too excited about. ...just a side note to the larger prospects for copper, and moly, along with possibly-not-insignificant credits for gold, zinc, silver and lead.

By the way, I think the Twin Butte claims area has been rolled into ASARCO's present day Mission/Sahuarita mega mine complex. Their visitor's center is a popular tourist attraction and well worth your time, if you happen to be in the area. [A peak into the future for Hay Mountain? We will get a better chance for understanding that prospect soon enought, eh?]

http://www.asarco.com/about-us/our-locations/asarco-mineral-discovery-center/

VP

* Tours underground at the old Copper Queen resumed only when the tour operators agreed to limit employee underground time to no more that two hours per week.