The Amazon-Manhattan Mining Company was located in the Beaver Mining District in Shoshone County, Idaho. The claims included the Amazon, Manhattan, New York, Ajax, Staten Island, Glenwood, Monitor, Monitor Fraction, and Merrimac. The principle ores extracted were silver, zinc, and lead.

The Amazon-Manhattan was never a consolidated mine but rather it existed as a partnership with Eugene Day as general manager. A certificate of ownership from 1921 lists the following: Jerome Day, Joseph Morton, Frederick Robertson, Fred Miller, and John Gleason. Since the mine was never incorporated, we do not have the benefit of board of directors' minutes or stockholders' meetings.

The Amazon-Manhattan was never a big producer. Most activity associated from the mine came in 1918. According to the tax return for that year, the company's total assets were $42,826.00. Otherwise, the mine filed their returns as a "non-productive" company. According to the documents, the only function of the company was to hold the title to the property itself. Assay records do indicate that the mine was excavated from the 500 foot level to the 1500 foot level. Most of this work appears to have taken place between 1917 and 1922.

It would seem that the Amazon-Manhattan was part of a larger conglomerate of consolidated interests namely, the Callahan Mining Company New York. A 1919 letter from the United States Fuel Administration concerning the Amazon-Manhattan was addressed to this New York company.