How to Build a Sluice Box?
You can build a sluice box with plastic pipe and a board. Lay the pipe flat and cut it in half. Secure the pipe to the board, which creates the riffles. Prop the board up with one end tilted and the other against the collecting bucket and turn the water on. To find more information click here: http://www.ehow.com/how_4798278_build-sl…