14 magg 1853 anni - Invention of Hydraulic Mining

Descrizione:

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] Matteson used canvas hose which was later replaced with crinoline hose by the 1860s.[4] In California, hydraulic mining often brought water from higher locations for long distances to holding ponds several hundred feet above the area to be mined. California hydraulic mining exploited gravel deposits, making it a form of placer mining.

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