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Filling a Large Hole in the garden

Discussion in 'In the Garden' started by adamthriver, 31 Aug 2021.

  1. adamthriver

    adamthriver

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    Hi everyone,

    We inherited a very large and deep hole in the garden. It is about 15 meters x 15 meters and about 1.5 meter deep. It was probably dug out with the intention of creating a large pond but just left there. We would like to fill it up so the final thing is a levelled garden, but would like advice as to what materials/aggregates to put right at the bottom and then what to put next etc.

    Thanks in advance.
     
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  3. motorbiking

    motorbiking

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    Assuming you don't need any soakaways etc. approx 2-3 tonne of broken brick, which is about £10 per tonne and 1-2 tonne of top soil (about £50 per tonne).
     
  4. Notch7

    Notch7

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    if thats 15 metres square by 1.5m deep -thats a 340 cubic metres

    a grab lorry holds about 15 sq metres so thats 22 lorry loads o_O

    I would say talk to a local grab lorry / muckaway company

    assuming it is a normal garden, what came out wouldve been mostly sub soil with a foot or so of top soil....on the top!

    bear in mind -when digging out soil, it "fluffs up" by around 50% -so it will also sink a fair bit -you may need to compact it when it goes in.

    Also you will need to finish high, lets it settle for about a year, then top it up.
     
  5. JP_

    JP_

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    Swimming pool?
     
  6. Tigercubrider

    Tigercubrider

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    What about some kind of rain water reservoir? Just thinking that retaining a void somehow, then covering /infilling might be easier than tons of solid material?

    Thinking of either a large tank/ linked tanks or a liner with milk crate style boxes stacked inside and wrapped with the liner. Could be used for garden watering or grey water?
     
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  7. JP_

    JP_

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    Log cabin with cellar?
     
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  8. Munroast

    Munroast

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    I'm working it out at around the 500 tonne mark, so a big job.

    Before you fill it consider laying pipes at the bottom for a ground source heat pump - the hole is a good part of the cost in having these systems installed. would seem a waste just to fill it
     
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