Show leaving low grade ore becomes tragedy W N 4 g i 1 K M M 2 V X U W gi 31 F A view of one of utah s mills where continued Is kept for ways to enible enable mines to ship lower grade ores all mines contain various amounts of low grade ore a 0 term given to the tha waste which Is too low grade to ship to the smelter or to mill some values are there but the operating cost Is too much to permit mining thus the extent of oe an ore body or the reserves ot of a mine are deter determined by operating costs and b how much of the low grade can bs be sandwiched in with the higher grade or commercial ore taxes labor costs shipping costs treatment and various other and sundry items go to make up the extent of 0 a a fineable mine able ore body in some instances it Is possible to mine the low grade product and tore store it on the dump in the hope ot of some further condition that will permit its shipment but more often it 11 la 1 loft 0 11 1 in n t the he mine n therefore ahe the higher the cost ot of operating a mine the smaller the tha fineable mine able ore body becomes and the smaller the ore reserves and tho the smaller the mining industry the long life of the industry in utah Is evidence that the mines have adhered to a policy of mining as much low grade ore as possible rather than g utting gutting the mine of the high grade tor for a temporary good showing it becomes a tragedy when low grade ore ores sare are left in the ground because it Is seldom possible to return and mine this ore unless the low grade Is mined with the higher grade the majority will be lost forever a and nd thus much potential wealth Is never taken out |