Back filled pond


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Pond liner left in ground & back filled.
Lawned over about 4 yrs.
Grass yellowing as permentation causing gases.
Any advice to how long this could go on,or is it best to dig it all out remove liner & start again.
Any advice would be grateful
Many thans simon
 
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JRS

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Welcome to the forum! Assume you mean fermentation? Assuming you did not poke holes in the liner before covering? Usually recommended to allow proper drainage. How deep and wide?
 
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It won't stop for a half century when the liner fails . you could always get an electricians drill extension they can be up to 6 feet long and just drill through the soil. punturing the liner like jrs said
 

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Welcome to the forum! Assume you mean fermentation? Assuming you did not poke holes in the liner before covering? Usually recommended to allow proper drainage. How deep and wide?
Thanks for the welome & reply to jrs.
Back filled my pond as it became to much work for me.
Pond size 10ft x 8ft 30"deep,no holes poke in liner
Folded liner in from sides,sediment left in (mistake) hmm,backed filled with earth & stones,then about 2 ton of limestone chippings,then 6" of earth,grass seed & grass grew great,3/4 yrs on now grass is just moss(its become a bog pit).
Pond was raised on a higher level so dampness weaping down to lower level,with a acidic smell.which is overwhelming at times
Im thinking possible fermentation is occurring & would the limestone be leaching in the stagnent ground.
Any advice on that theory.
Its a big job but i think it needs to be dug back out,removed,
Any advice welcome,before i undertake this mammoth task
Cheers simon
 

addy1

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you could always get an electricians drill extension they can be up to 6 feet long and just drill through the soil. punturing the liner like jrs said
Try making holes in the liner, a lot of holes.
 
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JRS

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I'd try the drill method first with many holes as mentioned. You only have to go down 30" to pierce the liner. Lot less work and should let the collected moisture drain away solving your problem.
 
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Welcome to the forum! Yes, it's a huge task to dig it back up but if you filled it in with big rocks I don't know if an extended drill bit will be able to get through...No harm in trying though I guess since that would be the easiest fix...
 

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if it smells like rotten eggs or sulfur you are making hydrogen sulfide. not a good product to have around at any level. It can be produced by decomposition of organic material. hydrogen sulfide is a acidic gas and will turn grass yellow and eventually kill it. if drilling LOTS of holes don't work you will have no choice but to remove the buried liner. if you can figure out how to pump large amounts of sodium bicarbonate in to the gravel layer to slow down and or stop the production of hydrogen sulfide. this is a gas you do NOT want to mess with long or short term.
 

Meh

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Maybe drill from outside the perimeter of the pond, at an angle, to avoid the rocks in the pond.
 
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easiest thing to do is rent a mini excavator. dig it up tear up the liner back fill . but it should also be asked what kind of soil do you have , if its clay then you have a problem
 
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Thank you all for advice,greatly recieved,my concern is the pond is close to house,wouldnt want smelly water going under house,could cause further problems,just wondered if there was a way of treating it.
Got a chap calling round tomorrow, have a chat about removal soil & replace.
I keep u posted,these problems may help someone
 
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yes i have my concerns about gases,would it benifit if i gottop6" of grass off to let it breath to the atmosphere
 
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Sorry ,that should read as
Yesi have my concerns about gases would it benifit if i took top 6" of grass off to let it breath to the atmosphere
 
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Soil is mixture of earth ,3,/4 limestone chippings,stones,silt,no doght some plant vegitation fom pond,would it be wise to scrap all of this & put new clean soil in its place.
Many thanks
 
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That all depends on the shape of your pond liner if one hole at the bottom would drain the entire pond because it is pitched to one side then your good. but odds are your going to need a whole bunch of penitrations to allow the water to drain . No sitting water will equal no smell . Go to any active land fill on a rainy day and the pleasurable aroma is one you won't forget. Go to a caped sight and you'd never know it was a landfill as one time.
In short the faster the water drains away the less problems you will have.
 
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Thanks to everyone fore their advice.
For peace of mind ive decided to remove the soil & liner.
Refil with new soil ,returf.
Even if i could penitrate the liner it would take so long to drain as its on clay base.
My fault,live with it,expensive lesson learned.
Not bessed of weather but
Hopefully tackle job in about a week or so.
Will inform of progress.
 
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thinking ahead,after old pond soil & liner have been removed,i will be left with a clayish pit,although back filling with fresh soil any intake of water will be slow to filter away,in time whats to stop similar process happening.
Ok i wont have pond silt to fermentate but will still create a dampish area and create another water build up,Also perhaps i should put a pipe through brick wall For a couple of feet& a few chippings ready for any water to escape,i could then have a diversion channel in ground away to a rain water gully.
Any thoughts please,cheers.
 

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thinking ahead,after old pond soil & liner have been removed,i will be left with a clayish pit,although back filling with fresh soil any intake of water will be slow to filter away,in time whats to stop similar process happening.
Ok i wont have pond silt to fermentate but will still create a dampish area and create another water build up,Also perhaps i should put a pipe through brick wall For a couple of feet& a few chippings ready for any water to escape,i could then have a diversion channel in ground away to a rain water gully.
Any thoughts please,cheers.
I don't think you will have the same problem. The water will perc through the clay. My yard is all heavy clay under about a foot of top soil. After a heavy rain, there are a couple areas that stay wet for a couple days but it does dry out pretty quickly.
 

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