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  2. Thomas Walsh (miner) - Wikipedia

    en.wikipedia.org/wiki/Thomas_Walsh_(miner)

    He was soon trading mining equipment to prospectors in exchange for their mining claims as payment. He also studied mining technology at night. He also studied mining technology at night. In 1877 he moved to Leadville, Colorado with a small fortune of between $75,000 (equivalent to $2,146,000 in 2023) and $100,000 (equivalent to $2,861,000 in ...

  3. Grizzly Flats, California - Wikipedia

    en.wikipedia.org/wiki/Grizzly_Flats,_California

    Grizzly Flats originated as a gold mining camp in the 1850s. The name was given by prospectors who were surprised by a grizzly bear there in 1850. [4] In 1852 it was described as being on a flat piece of land measuring approximately one mile by three quarters of a mile and having two combination bars, stores, and boarding houses, with more under construction.

  4. Rocker box - Wikipedia

    en.wikipedia.org/wiki/Rocker_box

    Gold prospector pouring water through his rocker box, Pinos Altos, New Mexico (1940). Rocker box exhibit at Dahlonega Gold Museum. A rocker box (also known as a cradle or a big box) is a gold mining implement for separating alluvial placer gold from sand and gravel which was used in placer mining in the 19th century.

  5. Old mining camp of Brownsville - Wikipedia

    en.wikipedia.org/wiki/Old_mining_camp_of_Brownsville

    The ranch's was bordered on the west by Coyote Creek. George Brown founded the ranch in the 1850, and supported the gold rush miners. George Brown sold the ranch in 1860 to William. Auditt and George March. In 1882 the ranch was sold to Leo Dolan and again sold in 1889 it was sold to William and Ethel Adams, mining engineer from Boston.

  6. Chinese-Americans in the California Gold Rush - Wikipedia

    en.wikipedia.org/wiki/Chinese-Americans_in_the...

    The only material people needed for alluvial mining was a rocker box which was a cheaply made piece of equipment that sifted gold out from stream beds. Some miners would take claims along streams individually but jointly registering claims proved to be an effective method of efficiently profiting, and Chinese miners actively participated in this.

  7. Hydraulic mining - Wikipedia

    en.wikipedia.org/wiki/Hydraulic_mining

    Gold miners excavate an eroded bluff with jets of water at a placer mine in Dutch Flat, California sometime between 1857 and 1870.. The modern form of hydraulic mining, using jets of water directed under very high pressure through hoses and nozzles at gold-bearing upland paleogravels, was first used by Edward Matteson near Nevada City, California in 1853 during the California Gold Rush. [3]

  8. Gold mining in the United States - Wikipedia

    en.wikipedia.org/wiki/Gold_mining_in_the_United...

    The largest gold-mining district in California is the famous Mother Lode of the Sierra Nevada. Found in the early 1850s, the lode is a zone one to four miles wide and running 120 miles northwest–southeast from El Dorado County in the north, through Amador, Calaveras, and Tuolumne counties, to Mariposa County in the south.

  9. California gold rush - Wikipedia

    en.wikipedia.org/wiki/California_Gold_Rush

    By 1855, the economic climate had changed dramatically. Gold could be retrieved profitably from the goldfields only by medium to large groups of workers, either in partnerships or as employees. By the mid-1850s, it was the owners of these gold-mining companies who made the money.