By the 1870s,the highest production of gold came from which method of mining?

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By the 1870s, hydraulic mining had become the highest production method for gold mining. It involved the use of high-pressure water jets to loosen and dislodge gold-bearing gravel, which was then washed through sluice boxes to separate the gold from the other sediment. This method allowed for the extraction of more gold in less time and with less labor than traditional pick and shovel methods.

By the 1870s,the Highest Production of Gold Came from Which