Daily Arizona silver belt., 1910-04-13
After Week Spent at Mines Is We'll Pleased with
 Progress Made
WILL START MILL
 BY CLOSE OF YEAR
Returns from Churn Drill Operations Reported
 as Gratifying


 neer, accompanied by B. Britton Gotts- berger, general manager of the Miami Copper company, has gone to Phoenix after having spent over week at the Miami mine.
 MT. Charming is on the way to in spect operations which he is conduct ing at the Planet mine, Bill Williams Fork, Arizona, and also the operations of the New Cornelia company at Ajo, Arizona. When ask d regarding prog ress at Miami, MT. Charming said that everything was proceeding according to schedule and that he expected to have the mill running toward the end of the year. The concrete work is nearly finished; the steel erection is well under way and the machinery is beginning to arrive.
 Mr. Charming said that underground the principal work was in the prepar- ation for the extraction of the ore body above the first or 420foot level. The permanent haulage tracks and com pressed air pipes are now being in stalled connecting the ore body with the main hoisting or No. 4 shaft and the laterals from the main extraction drifts, together with the raises are be- ing rapidly driven. Above the 420- foot level up to the 220-foot level, the ore has been cut up by sub-levels 25 feet apart. The main or No. shaft is about 700 feet deep and sinking will be stopped at depth of 720 feet, which will correspond to a depth of 764 feet at the old or No. l shaft, the top of shaft No. being A foot lower than the top of shaft No. l.
 A station has been cut in the new shaft to correspond to the 570-foot or second level and a station will also be cut at the 720-foot or third extraction level These main ex- traction levels are 150 feet apart or a total of 300 feet below the 420-foot level. Inasmuch as no ore reserves have been figured below a plane 50 feet under the 570-foot level, this would seem to indicate that MT. Channing does not expect that this point, namely, 620 feet from the surface, will be the bottom limit of the commercial ore, hence the arrangement for level at depth of 720 feet.
 When asked regarding the results of the churn drilling at the Miami, MT. Charming said that while the results had been most eminently satisfactory, he disliked very much to predict re- serves upon data of this character. He said further that seven holes had been drilled to date at 200-foot intervals and that every one of these holes had struck ore varying in thickness from l10 to 2lO feet and ranging in grade from per cent to 2.5 per cent copper. The total area prOspected by the holes i's about four acres.
 MT. Charming said that drift is being run in this direction and will soon enter the area covered by holes, this drift at present being in dike of porphyry. If the evidence of the holes was confirmed by the drifting and crOsscutting to be done he would then feel like assuming that these four acres containtd 2,0O0,000 tons of ore.
 Common report states that in most churn drilling operations, checking of the holes by raises has shown them to run about three-tenths of one per cent higher than the churn drill results, but Mir. Charming declined to admit this fact until such time as he had actually proven it in his own property. The two drills will continue steadily at work and should the possible prospective mineral bearing ground as yet undevel- oped yield at the same rate, nearly half million tons to the acre, it is easy to see the great possibilities of the Miami property. The two churn drills are still at work and will continue in definitely until the whole of the prop erty has been thoroughly gone over. Wherever possible, the results of the drill holes will be checked by under ground workings, either from one of the four shafts of the mine or, if neces- sary, new shafts will be sunk.
 When asked regarding Keystone, MT. Charming said that the ore body of the Keystone was more or less undulat- ing following the topography of the schist underlying the porphyry, and that while the results of drifting, crOsscut- ting and churn drilling so far had been very satisfactory, all the work had not as yet sufficiently correlated for him to make any estimates of tonnage. He thought, however, that in about two months the various connections would be made so as to give definite figures.
 MT. Charming said that undoubtedly large body of ore running over ? per cent would be developed and that the