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  2. Gold dredge - Wikipedia

    en.wikipedia.org/wiki/Gold_dredge

    The original methods to perform placer mining involved gold panning, sluice boxes, and rockers. Each method involves washing sand, gravel and dirt in water. Gold then settles to the bottom of the pan, or into the bottom of the riffles of the sluice box. The gold dredge is the same concept but on a much larger scale.

  3. Sluice - Wikipedia

    en.wikipedia.org/wiki/Sluice

    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 ...

  4. Rocker box - Wikipedia

    en.wikipedia.org/wiki/Rocker_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.

  5. Placer mining - Wikipedia

    en.wikipedia.org/wiki/Placer_mining

    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 ...

  6. South Forty-Foot Drain - Wikipedia

    en.wikipedia.org/wiki/South_Forty-Foot_Drain

    In 1960, the decision was taken to further improve drainage of an area of 70,000 acres (280 km 2), as part of a £1.4 million scheme which included the addition of two extra pumps at the Black Sluice, replacement of existing pumps elsewhere, and the widening of 7 miles (11 km) of the South Forty-Foot Drain from Donington Bridge to Rippingale ...

  7. Sluice box - Wikipedia

    en.wikipedia.org/?title=Sluice_box&redirect=no

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