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Re: Low water dredging
March 23, 2000 at 15:12:41
In Reply to: Low water dredging
posted by russ ford, (AZ) on March 21, 2000 at 06:38:27
Rus I have a few spots in granite country in particular where the black sand is something terrible (even just panning I will get an entire pan of black sand out of one 3 litre bucket!) . I have found, though, if your sluice and pump are well matched, the slope of the sluice is corrected to leave half your mat exposed between the riffles and you don't put too much through at one time then I have managed to get the lot. I made my 2" dredge to meet the following specs - 10" X 35" X 4", 2.5 Hp 2 stroke motor with pump at 300 Litres/minute, slope of 1 in 10, 12'of suction hose. The clue here is I feel to undertake your dredging at a nice slow and easy pace and give enough time for the riffles to clear.
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