Bisbee daily review., 1909-04-16
MIAMI BUSY SINKING LARGE SHAFT

Reports from the properties in the Miami section are all of an encouragt ing nature. The Miami company is busy preparing its big mine for pro auction. sinking the largest mining shaft in the southwest, and arrang- ing for the construction of the first unit of a 40Oo-ton concentration. The Inspiration company is pushing the development of its fine property. which gives promise of equaling the Miami Developments on the Key stone are very satisfactory and give assurance of another successful Lew isohn Notation when in the opinion of the management the property has been sufficiently explored.
 The Live Oak Development com pany is proving up a great sulphide deposit on it's property adjoining the Keystone. The long tunnel which Is in low grade ore nearly its entire length has shown great improvement the last hundred feet driven, the ore averaging 2 per cent copper, and the breast being now in 2 1-2 per cent ore. The formation is schist and the conditions are almost identical with those which obtain in the Miami 2 of chalcocite and the recent work in opening the tunnel has disclosed veinlets or seams of copper varying in thickness from knife blade to 1-2 inches. The tunnel has been driven 10 within 500 feet of the vertical shaft and will be continued to a
 connection with it at a depth of S7 feet. and if driven beyond the shaft to the northern boundary of the prop erty, this tunnel will attain a verti- cal depth of $50 feet Just across the The dividing the Live Oak from the Keystone property. the General Development company has developed sulphide on the Keystone by drilling with churn drills. The Live Oak will
 soon resume sinking it's vertical shaft
 Developments in the East Country.
 The eastern end of Globe district | is not lagging in the race for mining ! honors. The most notable of recent
 developments in that locality have ! been in the Superior and Boston and | the Arizona Commercial properties | The former company has opened phe | nomenally rich ore in the winze being
 sunk from the 450-foot level of the
 Great Eastern mine. A depth of IF feet below the level has been reached and the winze has continued in car 1 bonate and glance ore that car
 scarcely be equaled in the district Recent assays of ore from this winZt | have indicated values of from IA tt
 IS per cent in copper. and 10 1-2, 1. and 15 ounces fin silver to the ton 1 This winze will be sunk eighty-tiv'
 feet further. at which depth a cross
 cut will be run to connect with thu
 McGaw shaft at the 60O-foot level
 Sinking is in progress al the McGsv
 shaft at the depth of 175 feet, and thu raise to meet 1t is now ninety-hv'
 feet above the 400-foot level
 At the Eureka shaft of the AriZoni
 Commercial. the crosscut on the 600
 foot level encountered good ore il
 the hanging wall a week ago. Tn
 management is now giving it's atten ton to installing pumps on the 6O
 level and epxect to have them in or ! eration by April 20. The unwaterinl
 of the shaft below the coo will thei be the work of only a few days. Il week sinking VII be resumed a the Black Hawk workings. where tn winze at ffty-six feet below the 50t foot level is in high grade carbonat ore. the ore body being the same a
 that on the Great Eastern adsoininf 2 Developments during the next fe' months at the Eureka and Blac . Hawk shafts should prove very in portant. Construction work at tn Eureka shaft Is proceeding steadil 2 and August should see the smelte D completed As stated a few days az F in the Silver Belt, the capacity
 the Arizona Commercial shelter ha
 been increased in the specification e 10 400 tons. General Manager Benni \ is now here and President Amster g expected in Globe April 20.
 D cordova Copper Company.
 , The Gem shaft of the Cordoya Col k per company they are drigting on tn 7 vein from the crosscut on the 120 l. foot level, where rich ore was recen e " struck. The vein at that point hs
 been opened for seventy-ive feet an T the ore is as good if not better tha T. in the crosscut. A number of assay s return from per cent to 9 per ceI ll copper. The ore is a clean sulphid k carrying high percentage of sulphl d and iron. Sinking from the 1200-fo' VI level of the Gem shaft will be startt
 within day or two. At the Eurel