MxMining

Property History:

• The first work on the Promontorio property began in the early 1900s by the Manhattan Exploration Co., with funding provided by J.P. Morgan interests. An inclined shaft reaching a depth of 158.5 meters was collared in the hanging wall of the northeast-striking fault on a topographically prominent mineralized outcrop. Two other exploration shafts located to the north were sunk to depths of 30 meters each and a production shaft was sunk to a depth of 25 meters when work was suspended in the 1920s due to the Yaqui rebellion.
• In 1958, J.G. White Engineering Corp. recommended the property be put into production. An open cut 85 meters long from 7 by 25 meters wide and 20 meters deep was excavated to expose ore about the 100-level and a small mill was installed at the property.

Property History:
The Vallecillo mines, located in the southwest portion of the Providencia property, were originally worked by Spanish colonizers who apparently abandoned operations due to a combination of water problems and "constant incursions" by local peoples. The Vallecillo Silver Mining Company of New York bought the deposits in 1851. That company began operations at the old Jesus Maria mine, but water problems forced them to move about four kilometers to the east, to another Spanish-era operation, the Delores shaft.