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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.
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.
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.
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]
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.
This mine is still mined occasionally today. In 1992 $70,000 was mined out of it. In 1849 gold was first found in the Yuba river in Downieville. The tale of a 427-pound nugget found near there is unverified. [9] [10] Hydraulic mining was used at Howland Flat and Poker Flat in the 1850s. $700,000 worth of gold came out of Poker Flat alone. [3]