Salt Lake Tribune | 1915-08-15 | Page 29 | Bannack Company Driving Main Bore

BJUIUCK ' COMPJWY Dili JI HE Will Double 100,000 Tons of Ore in Sight Before Building Mill. Excellent progress ia being made in driving the main tunnel on the Ban-naek Ban-naek Gold Mining company's property, located in the Bannack mining district near Bannack, Mont., according to George T. Hansen, managing director. The bore is now in a distance of about 500 feet and the miners are breaking rock at the rate of nino feet per day. It is being driven for the contact between be-tween the limestone and the syenite, along which contact the gold ore occurs. oc-curs. According to the survey made recently re-cently by the company's engineers, the eontact Should be reached in about 125 feet more of driving. Approximately 8S0 feet of backs will be attained at the breast of the tunnel w'hen it reaches its objective point. The tunnel tun-nel will open the contact vein and will give an area of about five times the amount developed at present. . There ia at present blocked out in the mine approximately ap-proximately 100,000 tonB of milling ore that will average about $10 to the ton. The ore is of a free milling nature and tests by straight amalgamation have demonstrated that a much higher extraction can be attained by straight cyaniding. Tests made on the ore show that by the cvanide method a re covery of 96 per cent can be made. Tho present company is operating along conservative lines and it is the intention of the management to practically prac-tically double the present tonnage that has been blocked out before takiDg any steps toward building the mill. The plans for the mill, however, have been completed. The flume carrying water for the development de-velopment of pow'er at the propertv has been completed. This flume will deliver de-liver water enough to develop between 150 and 200 horsepower and later on the company plans to install a turbine and develop its own power. The property consists of thirteen patented pat-ented claims. " Grasshopper creek traverses trav-erses the holdings of the company and the placer beds that lie immediately below be-low the claims have been worked for yoars for their gold content by dredges. They have produced in the neighborhood neighbor-hood of $12,000,000 in gold.