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Collection: Photographs

Mining (PIC 5-MIN-C) (1,319 images)

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PIC 5-MIN-C 7
Hydraulic Mining. 3 monitors , denuded hill, Pictorial History of CA.

Negative #: Neg 1-M-62
Subject: Hydraulic Mining
Notes: 3 monitors , denuded hill, Pictorial History of CA.

Scanned on: 2008-03-13 22:43:38
File Size: 1.37 MB
Dimensions (pixels): 3,109 x 2,281
Print Sizes:
  • 4" x 6" = 777 dpi,
  • 5" x 7" = 622 dpi,
  • 8" x 10" = 389 dpi
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    & x Photograph by McCurry 145. Hydraulic Mining As early as 1852 it was discovered that gravel banks could be washed down and the gold-bearing rock caught in a manner similar to that of the sluice boxes already in use. Although economic and effective, hydraulic mining was not only destructive to the landscape but it washed great quantities of mud’ and rock down the streams filling river channel beds and causing them to overflow. For this reason the government practically prevents the use of .this method except in the Trinity and Siskiyou region. PICTORIAL HISTORY OF CALIFORNIA Department of Visual Instruction ¥ © University of California Extension Division y. Hydraulic Mining. 3 monitors , denuded hill, Pictorial History of CA.