Another informative post. Even without your technical knowledge...

Another informative post. Even without your technical knowledge I have heard enough to confirm what you say. Old codgers around here who still work little mines in the hills are sure AGS can get good grades and quantity. And out of interest while having underground powerlines put onto my property a very neat and well preserved tunnel was found cutting across my drive. They are all over the place here...and of course no records to tell where they are.