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A sluice gate. A sluice (/ s l u s / SLOOS) is a water channel containing a sluice gate, a type of lock to manage the water flow and water level. It can also be an open channel which processes material, such as a river sluice used in gold prospecting or fossicking. A mill race, leet, flume, penstock or lade is a sluice channeling water toward a ...
A long sluice box runs along the mine. [16] The sluice box was used extensively during the California gold rush for larger scale operations. When streams became increasingly depleted, the grizzly and undercurrent variants of the sluice box were developed. The grizzly is a set of parallel bars placed at a 45-degree angle over the main sluice box ...
The Little Sluice, also known as the Sluice Box or simply as "The Box", is close to Spider Lake. It can be bypassed in two ways for vehicles that cannot ascend the main trail. The most common bypass route is to the left of the obstacle known as the long bypass. The second way to bypass the Little Sluice is to drive up Toyota Rock.
[45] [46] A sluice box is essentially a man made channel with riffles set in the bottom. The riffles are designed to create dead zones in the current to allow gold to drop out of suspension. [45] [46] The box is placed in the stream to channel water flow. Gold-bearing material is placed at the top of the box.
Today, the rocker box is not used as extensively as the sluice, but still is an effective method of recovering gold in areas where there is not enough available water to operate a sluice effectively. Like a sluice box, the rocker box has riffles and a carpet in it to trap gold. It was designed to be used in areas with less water than a sluice box.
Gold pans and shovels are commonly allowed, but sluice boxes and suction dredges may be prohibited in some areas. [12] [13] There are public mining areas in many states, and prospecting may allow one to stake a gold placer claim or other type of mining claim in certain areas. Some public lands have been set aside for recreational gold panning.
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A single shipment of gold in 1866, representing a short run of gold bearing gravel through the sluice boxes weighed two tons and was valued at $900,000.00. [10] In the late 1860s two and a half tons of gold were produced in a final clean up of the sluice boxes. [8]