Hydraulic Gold Mining
Hydraulic mining: Hydraulic Mining was the quickest method of mining gold in placer deposits. Water would be carried to the mining site via canals and ditches where it would go into a hose.
The beginning of the hose was larger and higher than the other end which would have a pipe attached to it, so the weight of the water going into the hose would force it out the other end at great pressure. It was like mining using a fire engine hose, as the jet of water would cut into the hillside, washing the dirt and gravel down into a sluice box. It is important to note, however; that this method of mining, due to the scale of production and speed of extraction, had vast environmental impacts.
Fig. 4.13 Hydraulic Gold Mining.