Weekly journal-miner., 1916-01-19
BIG DEVELOPMENT
 CAMPAIGN IS PLANNED

= Big Jim Mining Company have made known the details of the development campaign to be carried on in their property during the next % days or so. The working shaft will be made deeper, stopping for time at about CPS feet. Stations will be cut at 500 and at 600-foot levels, and crosscuts run from them to catch the downward extension of the big vein which was opened at 400-foot depth. When these two new crosscuts are sent out and go entirely through the vein, drifts will be run in the vein i1 eacn direction on the 400, 800 and 6O0-foot levels, work being thus carried on in six faces simultaneously. Officials of the company estimate that the time required to complete the shafts and crosscuts will be possibly a little in excess of % days.
 Ol kAAO OlC SlAOOl NNJOSNh on the 40O-foot level showed an aver age value entirely across the 46 feet of ore of $7.44 per ton. Six feet of ore along the hanging wall side will average SIS per ton. There are nu- merous ore strata within the ore shoot which, if segregated, would yield a much higher average than this. The big fact is, however that the entire 46 feet can be mined and milled at a profit without sorting. It is interest ing to note that variations in surface elevation, due principally to erosion, cause the 4OO-foot level of the Big Jim to approximately correspond with the 275-foot level i1 the United East ern property, the surface of the Big Jim being nearly 200 feet higher than the surface of the United Eastern, both vertically and geologically. At 275-foot depth, the United Eastern rad practically no ore. The 6OO-foot level of the Big Jim, therefore, will about coincide with the 465-foot level of the United Eastern, where the property has ore of high grade. As the Tom Reed in its main workings at one end of the Big Jim, and in it; Black Eagle workings at the other end, has ore exposed down to much greater depths than either the Big Jim or the United Eastern have been developed to this date, the belief that the Big Jim ore body will continue with depth and increase in value as depth is attained, seems very well founded.
 While the working shaft of the Ivanhoc Is at a depth of approximate ly 400 feet, splendid ore is being de veloped near the surface on the Nancy Lee claim 700 feet from the shaft. An incline shaft is being cut down in the vein which at surface yielded about six inches of shipping ore The width of this paystreak has been increased something over IS inches. and values are likewise in creasi1g. Sampling of the ore from this streak gives values ranging from Sl46 to S35O per ton.
 For some time developments in the workings Of the Oatman Gold Mining & Milling Co. nave been indicative oi near approach to ere. E. NJ. Brooks, one of the most prominent mining engineers of the Southwest has just made an investigation of and report on the property, and states that con ditions are such as to lead him to be lieve that large ore shoot exists not far below the present crosscut. The company will explore the vein at a depth of 100 feet or more below the present crosscut as rapidly as the shaft can be sent to the required point and the necessary lateral work done. Mr. Brooks veriies the authenticity of the Big Jim strike. and states that more than 40 feet Of orc were cross cut.
 The Boundary Cone mas now started its new power plant in operation. and will develop the important ore body already discovered at $50 feet, will sink its shaft 200 feet deeper and crosscut to the vein from the 75O-foot point It is estimated that about NDO feet of cross-cutti1g will be necessary.
 Developments in the Ivanhoe, Gold Range, Jerome-Oatman, United East crn and Black Range are such as to cause the expectation of important news at most any time.