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Applying Bentonite to sandy soil
#527147 10/27/20 10:41 PM
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Hello everyone !
I’m new here ( first post) and I am having trouble finding the “ How to add 44.5 tons (or more) of Sodium Bentonite to my 1 acre poorly constructed , leaking ,sandy soiled pond bottom thread. Can someone please direct me to the right section to discuss this topic? I have a million questions . Thanks!

Re: Applying Bentonite to sandy soil
MartyC #527149 10/28/20 05:18 AM
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This is it!

Ill sit back, maybe someone can get Otto or Lusk to come help.

Is draining an option?


Im going to ask a lot of questions, but only because I'm clueless
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Re: Applying Bentonite to sandy soil
MartyC #527150 10/28/20 05:24 AM
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First, draining and drying is the only option. Bentonite needs to be mixed into the sandy stuff. Have you considered a liner?

A PB mag article, don't remember which one but the PB office should have it, discussed this. As I recall, most of the issue was devoted to this. But, it has to be dry.


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Re: Applying Bentonite to sandy soil
MartyC #527151 10/28/20 07:08 AM
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Maybe this is a situation where you'd be better off with soilfloc? Talk to TJ on here!


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Re: Applying Bentonite to sandy soil
MartyC #527157 10/28/20 08:07 AM
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Marty, since you are in Oklahoma where the Oil and Gas industry has been active for many many years. Look for and contact any Drilling fluid companies around you. Contact them looking for what is called liquid mud. Some of these companies sell this liquid mud. This is or can be a bentonite mix or ask them if there are any drilling operations going on around you. When an Energy company is done with the drilling they have to clean things up and may have to haul off the drilling fluid for disposal. It might be cheaper for them to haul it off to your pond. This would be done with what is called vacuum trucks. They would pump the liquid to the pond where it might help to seal the ponds bottom. This could be at no cost for you. Over the past 30 yrs we have done this many times. The pond needs to be drained before applying it.

Last edited by TGW1; 10/28/20 08:08 AM.

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Tracy
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Re: Applying Bentonite to sandy soil
CityDad #527180 10/28/20 09:11 PM
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Yes , the pond nearly drained itself after a few weeks with little or no rain. It’s a storm water detention type pond. I seined the fish and pumped the remainder out a couple of weeks ago. There were about 20,000 (or more ) small green perch and 2 each 8 & 10 lb flatheads in there. Strange

Re: Applying Bentonite to sandy soil
Dave Davidson1 #527181 10/28/20 09:14 PM
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I did consider a liner but for 3/4 or 1 acre a liner would be $30,000.00 or more?

Re: Applying Bentonite to sandy soil
wbuffetjr #527182 10/28/20 09:29 PM
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I read a little about Soilfloc but wonder about the cost and ever changing water levels and how it would be affected on the banks during dry spells. However ,if I wasn’t losing so much water to seepage I may be able to keep it topped off with a fountain supplied by one of my 2 wells?

Re: Applying Bentonite to sandy soil
MartyC #527183 10/28/20 10:04 PM
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Marty, Is your soil sandy clay or sandy loam??


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Re: Applying Bentonite to sandy soil
Snipe #527226 10/30/20 09:33 PM
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Originally Posted by Snipe
Marty, Is your soil sandy clay or sandy loam??


I’m not sure how to identify the soil . It seems like a very fine red sand. When I did a bucket test(With perforated bottom) it held water for 2 days then found a hole and washed out. When I put a small amount of the bottom soil in my hand and get it wet I can make a ball, roll it back and forth and form a “worm”. When it dries it becomes hardened but breaks easily. I have the soil conservationist for our county coming to look at it in a few days, but not sure if they do soil analysis or not .I know it’s important in determining the application rate for the bentonite. I think 4 lbs per sq foot might work but really am not sure how much is needed.

Re: Applying Bentonite to sandy soil
MartyC #527248 10/31/20 11:37 PM
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If you can make a roll or ball it's not loam. Sounds like clay to me, whether it's lean to fat I don't think it matters but when talking about bentonite and lbs per acre, that's mixed into existing substrate and compacted. Final layer should be high plasticity clay if available.
Plan 3ft deeper than what you want for finished depth is soil allows.
We did some hatchery runs NW of you in some lean sandy clay but we used a completely different method on those. Clay would not work because of frequent draw-down and re-fill.


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Re: Applying Bentonite to sandy soil
MartyC #527251 11/01/20 07:14 AM
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Originally Posted by MartyC
Originally Posted by Snipe
Marty, Is your soil sandy clay or sandy loam??


I’m not sure how to identify the soil . It seems like a very fine red sand. When I did a bucket test(With perforated bottom) it held water for 2 days then found a hole and washed out. When I put a small amount of the bottom soil in my hand and get it wet I can make a ball, roll it back and forth and form a “worm”. When it dries it becomes hardened but breaks easily. I have the soil conservationist for our county coming to look at it in a few days, but not sure if they do soil analysis or not .I know it’s important in determining the application rate for the bentonite. I think 4 lbs per sq foot might work but really am not sure how much is needed.


Why not take that same bucket and then add the bentonite to see the results of adding the clay. Might also give you an idea as to how much bentonite to add. You could mix it in or add it to the top of your sample of dirt to see what works best for you.


Do not judge me by the politicians in my City, State or Federal Government.


Tracy
Re: Applying Bentonite to sandy soil
TGW1 #527252 11/01/20 08:11 AM
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Originally Posted by TGW1
Originally Posted by MartyC
Originally Posted by Snipe
Marty, Is your soil sandy clay or sandy loam??


I’m not sure how to identify the soil . It seems like a very fine red sand. When I did a bucket test(With perforated bottom) it held water for 2 days then found a hole and washed out. When I put a small amount of the bottom soil in my hand and get it wet I can make a ball, roll it back and forth and form a “worm”. When it dries it becomes hardened but breaks easily. I have the soil conservationist for our county coming to look at it in a few days, but not sure if they do soil analysis or not .I know it’s important in determining the application rate for the bentonite. I think 4 lbs per sq foot might work but really am not sure how much is needed.


Why not take that same bucket and then add the bentonite to see the results of adding the clay. Might also give you an idea as to how much bentonite to add. You could mix it in or add it to the top of your sample of dirt to see what works best for you.


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