My monster dredge project

Here's my 4 inch dredge project.It has a keene p350 3X4 pump with a 450 gph and a 11hp engine.It's 8 feet long sluice,alum 2X2 frame welded nice.I still need a jet, air compressor matting and plates.I plan on using two 55 gal plastic drums up front and two 35 plastic drums in the back.Here's the size of the riffles
 3/8 inchs high X 15 1/4 inchs wide X 24 inchs long X 1 1/2 inchs space between them
 

3/4 inchs high X 15 1/4 inchs wide X 24 inchs long X 2 1/2 inchs space between them
 

1 1/4 inchs high X X 15 1/4 inchs wide X 36 inchs long X 4 1/2 inchs space between them
 
Any ideals ?


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http://www.thunting.com/smf/index.php/topic,35883.msg218898.html#msg218898

I'm in North Carolina Concord about 8 miles from Reeds Gold,It's hard to find a place to dredge in NC.I can go anywhere the gold is.


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http://www.thunting.com/smf/index.php/topic,35883.msg218909.html#msg218909

That's what I was thinking,I don't want to blow the gold out the back so I'm may have to play with the throttle.

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http://www.thunting.com/smf/index.php/topic,35883.msg218917.html#msg218917