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Last Post 18 Jan 2021 07:05 PM by  ARTHUR WAUGH
highbanker water flow
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ronald kline
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01 Jan 2017 02:11 PM

     

      I purchased a 36"alluvial highbanker I extended the top 12" and added extra rib matting and 1/8 punch plate , also added more water flow at top  much like a gold hog has, using a 30 gpm sump pump run off a Honda eu1000 generator, I have great flow and been tuning on it..  my question is what are your go to ways of setting sluice pitch, 1" per foot, finger in sluice, was told to use a small stone, love to hear some ideas. thanks

    ADAM ANDREWS
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    01 Jan 2017 07:01 PM

       From a carpenters perspective, I've set the angle with a couple of easy light weight options. You can't hike with a 4' (foot) level and a tape measure,     

     

       So option #1 is a string & a 2" string level. Rap the string around a rock, rap it around the top of the sluice. Hook the string level on the string. Now with the string around the top of your hand, go to the bottom of the sluice. If you have a  48" sluice then use your 4" wide hand as a measuring tape. So when the bottom of your hand touches the sluice's bottom and the string is level, you have a 4" drop. Adjust the sluice up or down, just keep the string level while using your hand or finger as a tape measure.

     

      Option #2 is the same thing but using a light weight 9" 'masons block' level & a string. It weighs nothing and it fits in a fold up sluice box.

    ronald kline
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    02 Jan 2017 04:52 PM
    thanks adam, I accually use a protractor to set degrees seems like 10 to 12 degrees looks right, guess I'm looking for a visual idea to check slope because water flow volume seems to make a difference
    ADAM ANDREWS
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    02 Jan 2017 08:07 PM

        The old timers will say always have the water level at the middle of the sluice sides, & not over flowing & never so fast that it makes a rooster tail. Rooster tails just shoot the Gold right up into the end of the sluice box.

    Brad Lamb
    Lost Dutchman
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    03 Jan 2017 06:52 AM
    add in a water baffle (piece of matting) just downstream from the water box to even out and eliminate "rooster tails"

    The Gold Hog Raptors and Gold Rush guys use them.

    I have them to my Keene 2.5" highbanker/dredge and use it all the time. I have also added one to my 18" Trommel, to very good effect! All of equipment runs off a Honda/keene pump combo (2.5-3.0 hp with Keene P90). At low rpm, the pump will power either of the units without any issue.
    Ronald Peterson
    Dredger
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    04 Jan 2017 01:35 PM

         Before high bankers made the seen we would set up our sluice boxes in the streams mostly by eye and the water speed in the box.  When we liked what we saw we would then throw in some small pieces of lead and a hand full of screened material.  If the lead stayed up top and the rocks walked not ran out of the box we figured we were good to go.

     

         Today I set my high banker at a 1 inch per foot drop using a torpedo level and a small tape measure.  Next the water speed is throttled to the rate that moves the material at a nice even walk out of the box.  Remember this gravity is our friend at a low slope and our foe at a high slope.

     

         Also just so you know 1 inch per foot drop on a protractor is 4 3/4 degrees.  At 10 to 12 degrees you are running over 2 inches drop per foot.          Ron

    ARTHUR WAUGH
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    04 Jan 2017 02:20 PM
    I got some of the self stick RV bubble levels and set the box to a 1" drop per foot, and stick them on.  Gives a fast setup in the field and then you can tune from there.  They are on all my sluices and the dredge as well.  Nothing extra to carry or get lost/left behind.
    ronald kline
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    04 Jan 2017 05:39 PM

    thanks ron, that's what I was looking for. I upped the water flow with pump size, that degree looked good with small pump but was ripping with the big one

     

    ronald kline
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    08 Jan 2017 12:47 PM
    I ran it in garage as a recirculating system at 1"per foot it doesn't clean very well and the more angle it cleans better but the riffles start to rooster tail as brad said, not a big fan of the mose and riffle set up, would it be best to install gold hog matting, also I'm testing with dirt brought home from n Carolina.
    Ronald Peterson
    Dredger
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    08 Jan 2017 02:00 PM
         Ron can you post a picture of your set up ?  Better yet if you live in AZ and are not to far away I would be happy to look at your set up and you could look at how I have my wash plant / recirculating high banker set up and how I run it.  The only time boiling occurs ( rooster tailing ) is when the material is fed to fast into the box ( over loading ) or water speed is set to fast.  You can also PM your phone # and maybe I can walk you through it.     Ron 
    ronald kline
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    08 Jan 2017 04:39 PM
    I'm in Pennsylvania where its like 14 degrees now, would love to bring it to ya where its warm, ill see if I can load any pictures, this thing came with a 1200 gph dc pump and I upped it to 1500 gph pump, I may be over thinking this because it found gold in dirt that was run twice in another unit, the hog matting claims to be less speed sensitive and I here a lot of other people saying its the way to go
    Jake Kircher
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    18 Jan 2021 03:12 PM
    What you are saying is, you put the sluice at the correct angle, stuck on the level to read "level" at that specific angle? That way any time you head out you set up your sluice and put it up to where the level reads "level" and fine tune from there? This way you are always in the ball park of the angle you are going for.? am i reading this correctly? Also a picture would help explain your concept.
    ARTHUR WAUGH
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    18 Jan 2021 07:05 PM
    Jake-

    You have it right... I'll start on the floor, raise the upper end 1" per foot of box, ie. 48" sluice, 4" at the upper end. Then stick on the camper level so it reads "level", and when I set up in the water, that's my starting point. Flow rate of the stream will dictate adjustments from there.

    Slow water might call for more drop, fast water might need less.


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