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View Full Version : Dredge riffles



Tom K
09-06-2012, 03:45 PM
I am trying to make a dredge and I could use some help please. I am using a pump that delivers 150 gpm. It has a 2 inch intake and a 2 inch discharge. I made the discharge 1 1/4 and took it into a nozzle with a suction of 2 inches. This goes into the crash box and to the sluice. My sluice is 11 inches wide and I am using 3/4 riffles spaced 2 inches apart. I have pretty much guessed on the sizes that i am using and it is getting some fine gold. With all that my question is... Am I on the right track or what do I need to change? Thanks for any and all help.

micropedes1
09-06-2012, 06:51 PM
Tom, you should engineer your riffles to the size of gold in your area. If all that you are recovering is fine gold, then I would go with expanded over Nomad. The possibility of nuggets might induce me to put a few Hungarians down near the discharge. But not at the top where they would agitate all the fine gold back up into the flow.