A high banker or Highbanker is also known as a power sluice and is a sluice box with a hopper and grizzly that is powered with a motorized water pump. The grizzly screens the gold-bearing gravel or paydirt removing the larger material from entering the sluice box while water is being prayed to wash and break apart the source material. Water to a high banker can be brought up from a stream or other water source that's sufficient for the water pump. A highbanker is a great choice for processing a larger amount of material over the standard sluice box.