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Land drain problems - help!

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  • 20-04-2008 12:07pm
    #1
    Gabesdude
    Closed Accounts Posts: 4 ✭


    Any advice is welcome please! I'm installing some land drains in my garden. It's very nearly level / flat and around 10m x 10m. Water pools in several places after it rains. Clay is very near the surface and very very thick.

    On the project I've started now, I'm finding some serious clay - I've started digging a pit / soakaway for the pipes to drain into. Under the very shallow topsoil, I've found around half a metre of clay, then what appeared to be a slightly more permeable layer. All the websites I've checked seem to suggest I need to be digging 1.2 to 1.8 metres down - so we kept on digging. I've now hit more clay and we're at 1.4 metres - 40cm doesn't seem like much further to dig, but can I really expect to hit a porous / permeable layer under the clay? It's getting a bit demoralising!:confused:

    Am I going about this the right way? If I hadn't dug beyond the first porous layer, I'm guessing I'll still have problems in the long run as there's still this second lower layer of clay and any run-off water would sit above this second layer of clay.

    Also possibly of note is that the site my house is on was built around 16 years ago - it is a large-scale Barratt site. There is also a history of mining in the area.

    Any thoughts or advice are very welcome - I just want to get my garden to a state where my 4 year old son can play on it without sinking in it!

    Many thanks!


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