Filling in pond / hole advice

Filling in pond / hole advice

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Discussion

PageyUK

Original Poster:

200 posts

156 months

Friday 17th May
quotequote all
Hi,

We moved in here Sept last year and the pond was in situ. Whilst we really like it, I have young children and so we decided to drain it and fill it in to avoid any accidents! It also opens up a useable space for my kids to use (possibly a trampoline, etc).


url]|https://forums-images.pistonheads.com/257023/202405174319009[/url]


I recently drained the pond and removed all of the liners/carpet/pumps/etc. The fish, newts, frogs, etc were re-homed/donated to someone nearby with a pond. I carefully did this whilst slowly draining it with nets, etc. I then had the enjoyable job of shoveling out all of the debris at the bottom of and around the edge of the pond.




There were and still are an awful lot of ornamental rocks around the pond, so I decided to chuck in a layer of those to act as drainage/firm the ground up



This is the point I am at now, and I am a bit stumped on how best to fill in the remainder of the hole to make it stable/not sink/etc. Here are the measurements:

Length of Pond: 450cm
Width of Pond: 300cm
Depth of Pond: 60cm
Depth of Pond now with 1x layer of rocks: 50cm

So I now have about 50cm of depth to fill to bring the level back to the surrounding ground... Should I be looking to just dump a load of top soil for this? Do/should I need any MOT/Type 1? Will I need to wacker it down? Should I remove the layer of rocks I've put in there? Any other advice? How much of each material will I need based on my measurements?

I am probably over thinking it, but just want to ensure the job is done right.

I will also need to fill in the steps/waterfall indents as well, but will hopefully be able to do that with any remaining material?

Thanks!

JimM169

427 posts

124 months

Friday 17th May
quotequote all
Personally I'd remove the rocks (in case you want to grow anything there in future, even if it's only grass) and fill with top soil, you will get sinkage but that's pretty much unavoidable. If you're on a budget check places like Facebook marketplace, there's always people looking to get rid of soil for free

The Three D Mucketeer

5,939 posts

229 months

Friday 17th May
quotequote all
The previous owners of my house had a pond which they filled in and covered with slate chippings.... I hated it and it just got weeds and looked scruffy... So I got a few tonnes of Top Soil and converted it to a strawberry bed lick , get loads of strawberries and they're confined to the pond area. Re-doing 1/3 of it this year , by replacing the old plants and putting down a membrane ... because I still got the weeds .

PageyUK

Original Poster:

200 posts

156 months

Friday 17th May
quotequote all
JimM169 said:
Personally I'd remove the rocks (in case you want to grow anything there in future, even if it's only grass) and fill with top soil, you will get sinkage but that's pretty much unavoidable. If you're on a budget check places like Facebook marketplace, there's always people looking to get rid of soil for free
OK thanks. So you think the rocks are a bad idea? I thought they might help with drainage and stop the ground sinking....

Do you know roughly how much material I would need based on my measurements? ~ould I need to tamp it down during infil with a wackerplate or similar?

Thanks

JimM169

427 posts

124 months

Friday 17th May
quotequote all
PageyUK said:
OK thanks. So you think the rocks are a bad idea? I thought they might help with drainage and stop the ground sinking....

Do you know roughly how much material I would need based on my measurements? ~ould I need to tamp it down during infil with a wackerplate or similar?

Thanks
I'm no expert, but don't think there's any benefit to leaving them in (other than not having to dispose of them)
Really depends on future use, it looks pretty shady and tucked out the way so if it's just a play area, trampoline space etc it's never going to be pristine anyway so probably not worth investing a huge amount of time\money
I'd fill it in and compact as much as I can (just using a tamp, wouldn't bother getting a wackerplate), let it settle and top it up again in 6 months or so

There's plenty of topsoil calculators out there but based on the measurements you've provided, you'll need 8m3 / 13 tonnes!!


Edited by JimM169 on Friday 17th May 14:31

biggiles

1,744 posts

227 months

Friday 17th May
quotequote all
I'd personally leave the rocks in there, if they're 0.5m deep then they aren't going to affect growing grass. Many places have 4" of topsoil before hitting subsoil.

I expect you'll need to dump in (many) tonnes of topsoil, spread it out, squish it down, then inevitably do another layer once it's settled.

A small digger would help, but it's doable by hand, /if/ you can get access for the dumper lorry.

Or just level it out with a bag of MOT, and install the trampoline below ground level.

Blue One

467 posts

181 months

Friday 17th May
quotequote all
It’s a shame people do this, ponds are a fantastic haven for wildlife in urban/suburban areas and can provide endless fascination for kids…

surveyor

17,891 posts

186 months

Friday 17th May
quotequote all
Blue One said:
It’s a shame people do this, ponds are a fantastic haven for wildlife in urban/suburban areas and can provide endless fascination for kids…
Knowing someone who’s toddler was fascinated with their shallow pond, and suffered a substantial brain injury after falling into the pond I completely understand and agree with the OP’s caution

It’s easy to say kids should not be unsupervised but actually real life gets in the way sometimes.

Evanivitch

20,425 posts

124 months

Friday 17th May
quotequote all
Blue One said:
It’s a shame people do this, ponds are a fantastic haven for wildlife in urban/suburban areas and can provide endless fascination for kids…
I agree, a fence or safety grate would have been my solution.

Caddyshack

11,003 posts

208 months

Friday 17th May
quotequote all
We had a pond and stream in our garden as a kid, I spent hours wading around in there looking at all the wildlife….equally my Dad was mates with Risk Parfitt and he had a child drown in his pool at the same time….it is tough choice.

PageyUK

Original Poster:

200 posts

156 months

Friday 17th May
quotequote all
I get what a few of you are saying. I rather like the pond and the wildlife it attracts, however my daughter's are young and they like to explore. We don't feel easy with them being out in the garden on their own so it had to go. Particularly as we've caught them near it a few times.

We've unearthed a pile of soil and weeds at the bottom of the garden. Whilst the soil isn't great and is full of weeds, etc I think I might use that to fill a fair bit of the hole. I'll get a tamper and tamp it down thoroughly as I go and then get some top soil for the remaining 3 or 4 inches.



Does that sound a sensible idea? Should I keep the rocks in there?

cliffords

1,421 posts

25 months

Friday 17th May
quotequote all
Keep the rocks in there , it fine . Whoever suggested they come out are idiots .

and31

3,160 posts

129 months

Friday 17th May
quotequote all
Definitely keep the rocks in there if you are filling the hole in-a bit of type one on top to bring it up to nearly level ,I would suggest a wacker plate ,otherwise it will definitely sink to some degree, then a bit of topsoil and seed.a couple of inches of topsoil will be more than enough for grass to grow

Chainsaw Rebuild

2,016 posts

104 months

Friday 17th May
quotequote all
Can you use the rocks to make something like a rockery or raised beds?

Even better, what about some kind of sunken bed, or sand pit?

Then you have the option of reinstating the pond relatively easily. Plus I had a sand pit as a kid and I was always using it.

Belle427

9,090 posts

235 months

Saturday 18th May
quotequote all
Id leave the rocks in there too, if you ever wanted to reinstate in the future it would be easier to remove them.
A decent covering off topsoil should make it safe to walk on etc.

Joe M

683 posts

247 months

Saturday 18th May
quotequote all
Worth putting a load of sand in before the top soil to fill all the gaps between the rocks?

Some Gump

12,731 posts

188 months

Saturday 18th May
quotequote all
Blue One said:
It’s a shame people do this, ponds are a fantastic haven for wildlife in urban/suburban areas and can provide endless fascination for kids…
Build your own pond then.

Judging the OP for making his house suit his family? Only on the internet.

vexed

382 posts

173 months

Saturday 18th May
quotequote all
I had a similar situation- big pond which was leaking and meant young kids couldn't be kicked out into the garden unsupervised. I started but putting some topsoil in but a couple of tons only looked like a molehill in the bottom.
The places who sell topsoil will have the stones/rubble to get rid of and are likely to give it for free. Get some of that to fill the volume then pay for proper topsoil to top off. If you are grass seeding you need to crack on and do it soon, you will struggle to get it to germinate if the summer is dry! Or wait until September.

vexed

382 posts

173 months

Saturday 18th May
quotequote all
5 years on it has settled a little in the middle- a further dumpy bag of topsoil and grass seed has sorted.

Caddyshack

11,003 posts

208 months

Saturday 18th May
quotequote all
Some Gump said:
Blue One said:
It’s a shame people do this, ponds are a fantastic haven for wildlife in urban/suburban areas and can provide endless fascination for kids…
Build your own pond then.

Judging the OP for making his house suit his family? Only on the internet.
I don’t think they were having a pop at the OP to be fair. I think they were just talking more generally about wildlife ponds.

I totally get that the op needs to keep family safe. We have a pool and I was absolutely paranoid when our daughter or her friends were under 5, I had an auto closer on the gate and a decent fence, the kids were never unattended and she knew the rule was nowhere near the fence without an adult. As per my posts earlier….i have seen accidents happen.