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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. 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 ...

  4. Mining methods of the Klondike Gold Rush - Wikipedia

    en.wikipedia.org/wiki/Mining_methods_of_the...

    A faster way was by a rocker box or by sluicing. Dirt was filled into the box or sluice together with water and rocking movements or gravity would make the gold particle go to the bottom whereas sand and fine gold particles would flow off with the water.

  5. 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.

  6. Hydraulic mining - Wikipedia

    en.wikipedia.org/wiki/Hydraulic_mining

    A man leans over a wooden sluice. Rocks line the outside of the wood boards that create the sluice. While generating millions of dollars in tax revenues for the state and supporting a large population of miners in the mountains, hydraulic mining had a devastating effect on riparian natural environment and agricultural systems in California.

  7. Rays' new stadium project gets bonds approved by St ... - AOL

    www.aol.com/sports/rays-stadium-project-gets...

    The Tampa Bay Rays are getting money to build a new ballpark — apparently whether the team wants it or not.. The St. Petersburg City Council voted to approve bonds that would help fund a new $1. ...

  8. Mining sludge - Wikipedia

    en.wikipedia.org/wiki/Mining_sludge

    In the 1840s in California and 1850s in Australia, methods for extracting alluvial gold were developed which involved washing soil and gravel through sluice boxes using diverted streams and other water sources. The waste or tailings were released into the waterways forming large deposits of highly mobile sediment.

  9. Italian Sea Group says it is not liable in Mike Lynch yacht ...

    www.aol.com/news/italian-sea-group-says-not...

    Italian Sea Group is not liable in relation to the fatal sinking of Mike Lynch's superyacht, which killed the British tech billionaire and six others, its chief executive said on Tuesday. The ...

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