Mohave County miner., 1916-08-12
YAVAPA. COUNTY OLD-TIME
 BONANZAS AGAIN ACTIVE

grade. While attempting to remove
 these pillars, in later years, the
 ground caved from the third level to
 surface for several hundred feet in either direction from the shaft, leav- ing an immense chasm extending from
 wall to wall-a width of 70 feet-and
 laterally along the vein workings a distance of 400 feet. This great cavity is known as the Bonanza Cave" It cut off access to the mine workings
 and forced the sinking of new shaft. The latter is located about 400 feet west of the old shaft and intersects it at depth of 286 feet on the incline. Connection was made with the second and third levels of the old workings.
 In drifting southwest from the new
 shaft a body of ore was opened and stopped that milled S2,OOO,OOO worth of gold. This stope is of enormous pro portions and presents the appearance of a natural cavern rather than the handiwOrk of man. Due to it's un- usual size and shape the miners called it Castle Garden" On the same level an attempt was made to get under and draw the ore from the Bonanza Cave" by means of a crosscut. As it was driven under the leave" on the hanging wall side it failed its pur- pose owing to the unstable nature of the caved ground, which could not be safely timbered. Ultimately this crosscut caved to the solid rock below. These reverses were augmented by a barren streak in the vein, and the Englishman, becoming discouraged, quit the property in disgust.
 New Regime
 About three years ago the Harqua Hala Bonanza and Golden Eagle groups were taken over by the Yuma Warrior Mining company. Since then they have undergone development al- most continuously. The deal included a 40-stamp mill, air-drills, compress sors, hoisting machinery and a full complement of camp equipment and underground mining apparatus, to- gether with an aerial tram about sev- en-eighths of a mile long, running from the Golden Eagle shaft to the Harqua Hala Bonanza mill. A pump ing plant, and a water supply more than ample for camp and milling needs were also included in the deal.
 Last February the company began milling ore mined during the ordinary course of development work, and to date has shipped about S25,OOO worth of bullion. Shipments of the latter in bars valued at $4OOO each are made from time to time to the Bank of Ari- zona at Prescott. Work at present is confined to proving up new ore bodies | that have been found in the Harqua | Hala Bonanza mine. Geological con- ditiOns on the lower levels indicate 1 that the Harqua Hala will come back | as copper mine carrying high values in gold. It will be remembered that | the famous United Verde copper mine was a quicksilver producer, solely when | purchased by former United States Senator Clark in 1888. What has been accomplished in the United Verde Mine may be repeated in the Harqua Hala mine. That such may be the case is well within the range of proba- bility.
 When the present company took over the property, work was immedi- ately resumed in the old fourth level, and a crosscut driven around the caved portion of the Bonanza stope to the fOotwall for the purpose of draw ing the large tonnage of vari-grade ore. By utilizing supplementary mill ing appliances-soOn to be installed- the greater portion of this tonnage can be reduced at a profit In driv- ing across the strike of the old ore bodies to reach the foot wall of the Cave" 37 feet of ore was encoun- tered. Fifteen feet of it assayed $17 gold per ton. The remaining p feet, while low grade, has commercial val 1e. The ore stopped from this deposit milled $9.SS gold per ton.
 The same ore body has been opened on the sixth level (5O feet belOw) by a crosscut 85 feet long. Two veins one pitching to the east and the other to the west-were tapped at that point. Subsequent development dem onstrated that the ore body on the fourth level was formed by the june lure of these veins just below the floor of the level. The west vein, where underground development on the sixth level gives assay returns of from S6 to $22 gold per ton The ore