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Densmore Consolidated Gold Mining Co. Assay Ephemera [166986]

Currency:USD Category:Collectibles / Mining Start Price:100.00 USD Estimated At:200.00 - 300.00 USD
Densmore Consolidated Gold Mining Co. Assay Ephemera [166986]
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Lot of 6. The Densmore Mine contains 59 acres extending southeastward from Stanislaus River up the steep east slope of the canyon to the Columbia and Parrotts Ferry road 2 miles from Columbia. The gold is principally associated with pyrite, marcasite, galena, and other sulfides. The first reported production was in 1899-1900 by William Francis, who shipped rich sulfide ore that yielded $26,000. Hayward and Lane and Densmore Consolidated Mining Company worked the mine from 1900 to 1906, and used a 14-stamp mill, concentrators, and cyanide plant to treat ore from a shoot about 200 feet long and 400 feet deep, which was found in No. 3 adit, connecting with a shaft 500 feet deep. About 19,000 tons was produced during this period. From then until
1936, the workings were extended but little ore was milled. 1) 1901 letterhead for ores worked January 1901. 2-3) Two Reduction Works Reports, March and April 1901. Lists results for Ore, Sulphurets, and Tailings. 4-5) Two Memorandums of Gold Bullion, 1902 and 1903. Results range in gold fineness from 344-740. 6) 1901 Assay Report for Mill Sulphurets and Tailings.

Date: 1901-1903
Country (if not USA):
State: California
City: Columbia
Provenance: