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Show STEAM SHOVEL AND THE COPPER MINES C B lakcnan, general manager of the Nevada Consolidated company, furnished some recent records mada lu the Copper Flat pit at Ely, whero during June the No. G shovel hand-lod hand-lod 71,000 cubic yards of stripping, approximately 130,000 tons. The cosl of the work nvorages. 13 cents per dry ton of ore (average moisture 0 per cent) or 4 cents per cubic yard of stripping. Slightly lower costs are attained In summer when the dlgglns Is a little easier, and the delays are fewer. Similar work Is being done lu Iho Bingham pit of tho Utah Copper company, com-pany, with eighteen or nineteen shovels shov-els at work, ore and overburden arc being handled at the rate of 30.000 tons per day, or roughly, thirty-five tons per minute. During tho quarter ended March 31, tbe cost of dry excavation exca-vation in the central zone of the Canal was given as 37"ccnts per cubic yard In the absence of itemized costs, close comparisons are Impossible, but 1 it is evident tbat our friends In Nevada Nev-ada and Utah aro making records lu j this work. To the engineer of imagination tho sceno at Bingham at night, with the shovels at wo.'k beueuth tho glnro of I tho searchlights placed upon .the hills opposite Is dramatic In the extreme: ' Indeed, the whole work which D. C Tackling and his associates have carried car-ried on Is a striking example of creu- tive Imagination applied to engineering engineer-ing work. In a later issue we pro- I poso to discuss more at length some I of the problems met in carrying on mining and milling on so huge a ! scale. |