Equipment
This is the Jobe Combination high banker and dredge. There are many other units made in the same configuration. This one has a metal hopper which I think will last longer than the composite types.
Setup
Usually set up on the bank of a river or creek. Pumping water from that river/creek into the hopper. The discharge is directed back into the river/creek by way of a settling pond that catches the sediment helping to prevent pollution of the river/creek.
Operation
Pump the water into the hopper, the hopper is where you shovel your gravel where the water 'washes' the heavies into the sluice portion of the high banker. This is where you separate the waste rock for the pay dirt.
Clean Up
After all the raw gravel is washed through the hopper and down the sluice, what is left is the concentrates in the ripples and sluice mat. This is then processed through the next phase to separate the heavies from the waste lighter materials.