Bisbee daily review., 1908-07-21
THE CANANEA
 CON. COMPANY
 DURING 1907
An Extract From Annual Re- port of Greene Consolidated Company Which Controls the Cananea Consolidated.
CRv L. D. Ricketts.N


 Consolidated Copper company occur at very considerable distance from the surface. rendering Gin all cases but one open cast work impossible and the old method of square setting and filling was found exceedingly eX. pensiye on account of the softness and heaYiness of the ground. J. H. KlrR has for many years made serious study of the question of cheaper min ing and he finally had a careful inyes tigation made of the caving system iI use in the Lave Superior iron ranges On account of the fact that first class and second-class ore commonly occur in the same face in our mines and the necessity for the separation of these two classes of ore, he finally put in practice the "slicing" system and introduced this system in the lat ter EaTt of 1906. Necessarily there were extraordinary expenses in intro ducing this system in ground that had been partially worked by square setting, but at once it showed a de CidCd saving over the old method, and as the men have learned the worK and the system has come more and more into general use the reduction iu the cost of mining has become very illaI hJN. III tdHudIAs iFus, IlC IOob of mining. including construction, was S7 per cent of the cost for August, 1906. In September, 1907. the mining costs including construction, were only 6 per cent of the costs of August, 1906. showing 8 reduction in these fifteen months of about 37 per cent During the period in question the condition of mines made it eXpedient for use to attack very lean ore. We have, however, large reserves of ore of much better grade, and when We resume production We shall, as long as the price of copper is below the average of the last seventeen months utilize ore of a better grade.
 Development in 1907.
 The most important developments on the property during 1907 were iD the Oversight and CapOte mines and at PuertocitOs In the Oversight we have developed ore to the northwest Of previously known ore We have also struck into this same ore Oil the third level. but development on this level has not yet proceeded far. Raises from the second level show tais ore reaches nearly to the first level. We have done no stOping in the block In question, but from indications there is a very considerable amount of ore in the ground that will yield from 5N to 60 pounds of copper to the ton.
 On the southeast end of the Over sight ore body some very good oTt aas been developed on the second level. and just before the close-dowI we struck ore of excellent grade oL the third level in Blocks IT and l5 hut how extensive this ore is We df not know It is evident, however that a run of good ore extends in tn ground from the second to the uhlrC level.
 A very large quantity, several hun dred thousand tons, of lean ore na been opened up in the Black Stope c the Capote. It is doubtful, however, this ore will mine to a grade muc, exceeding per cent. Capote shal No. 9 has been sunk to the Lenth le'e .a crosscut run to the ledge ana som drifting has been done. Just DeIor the close-down we tapped the "aI7 and struck into what may De me - treme northwest corner or the olu V' body At this point there was slla efrask of glance in quaFtZite. and
 FoE Faet of crushed quartZite contail ing copDer. glance. The ore Is not commercial quantity in this parucI lar crosscut. but the fact of hndln conner glance at this level is encou sgiug and when operations are r sT-ped development in this reglon VI VI 6e actively prosecuted toward u -0utI,sast where the course or the o gody above would indicate it's prOp' location. In the straightaway ITO n. shaft we pa<Sed through about
 Cost of ore that gave an average a e.v of 1 per cent. It appears to D Iona to the north ore body tBiat IO's
 fire started in the old ore body +bo CanOte mine in July, l9Ob, al this ore body had to be bratuced ( and has been standing ever since. tooly advantage of the clOse-doWn al nI,IIed our pumps. allowing the wal to rise and also turned into the mi n. vater being pumped by the Ser ss1 Cobra compauy. adjoining Q Dr. 0erty- The water is now W WNl'L Sn fae+ of the fourth level and We Dect to be able to fill it up Uo fo,I-+b level. When the water HI rescbed the fire zone trelleHuU a,aounts of foul gas escaped rom -Iioe but since the water got dDO Es,a fftn IaveI the foul gases nave
 most entirely disappeared anu M
 IID~e tbat the fire is extinguished,
 tbis ore body (not worked TOT a l It her of years) it is known that tA' are large quantities ot desirapIe
 IaFt standing and are filling ID the
 stopes. ,,,,5argro,,pd
 yaIorment was stopped on account tba fact that it was considered In
 adyautageous to spend the none! '
 ,bsra where the chances Of gettlh zIigher grade ore were more eHIue Igf Guarry work was started on
 o1tcroD and was carried on tnrot tt., ,ear We have opened up q' rg of an average height of about
 fset and about 800 feet in leL'gtl, tbcTa is every appearance or the Iio tain snrnfshing large quanuty oL
 containing about 3 l-2 per cent cop aDd as many ounces in silver at d
 At fbe Elisa mine a considers
 so,nt of development has been q
 am a,,iI1,s' s5e 100 and 200 foot levels .,, ol
 n .ro ' winzes sunk from the adlt tun q 1',tb very satisfactory resu,5s, iao- . VII VII was operated during ls0l a
 Ia, mn ewing 2 satisfactory class
 scrou..t of its coarseneSs'