These are some hydraulic riffles I built for fine gold recovery and two millimeter Diamond recovery. The jig hutch product was gravity fed to this little system I made. We had a lot heavy blacksand concentrate and it contained some gold. While nobody got rich on this, it did give us a good Idea what we had on bedrock for gold and Diamond indicator minerals. I built a floating recovery barge complete with pumps and electric power. Fully loaded and operational with fuel and men it only drafted 22 inches.
We were dredging with a 10 inch suction dredge and sreening the material to 3/4 minus and using a 3 inch gravel pump to supply the jig with the Diamond bearing slurry.
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