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The Riverhog mat creates a strong CUTTING action and a strong vortex. Much like a tradition riffle. The awesome thing about the Riverhog riffle is that it can be trimmed to YOUR needed height, and to either a cut or throw angle. (Explained in the video)
You can use it in ANY sluice as long as you match the water depth with the riffle height, but it’s great for the top of dredges where water is rough as well.
For Modern to High Sluice Velocy / Energy