Those who run a sluice box in a creek or stream will find this tip very helpful. Ever notice how heavy and awkward it is to lift a sluice box full of cons out of the water? Do you ever wonder how much gold blew out the back end when you started to lift the box out of the water and you saw everything start boiling backwards? Take a piece of wood that is 1/2 inch thick and cut it to fit the inside square part of the box at the very top end. Drill a 1/8 inch hole at the top about a 1/2 inch down from the outside on both sides of the box with the piece of wood in place. Next put a screw in each hole and into the piece of wood. If done right the piece of wood will flip up and down with ease. Run the box with the door / gate flipped up. When you want to pull the box from the water flip the door / gate down. This will stop the flow of water in the box and make it super easy to lift the box up and out without fighting it. Note, this works best no boxes that are 4 foot or longer. Any box you are having trouble lifting from the water this may be the answer.    Ron