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Water ingress

  • 24-09-2015 10:02pm
    #1
    bleary
    Registered Users, Registered Users 2 Posts: 495 ✭✭


    Title probably should be building on a boggy site
    I'm interested in a new estate being built locally. The Location is handy enough and finish looks good , the site appears a bit marshy though. I checked out the planning permission and they mentions groundwater ingress at 1.5m around where the houses will be built. Planning permission was granted. Does this sound alright? Would this be of concern ?


Comments

  • #2
    Drift
    Closed Accounts Posts: 1,395 ✭✭✭Drift


    Where did you find this item on the planning file?

    Was it groundwater ingress into a trial hole at 1.5m below the surface?


  • #3
    bleary
    Registered Users, Registered Users 2 Posts: 495 ✭✭bleary


    Thanks drift, yes it was on the planning file the trial hole closest to where the house I was looking at had groundwater at 1.5 m below the surface, the report then recommends that they possibly use steel reinforcing but I can't find anything specific in the planning permission concerning measures they have to take.
    I'm assuming these days if they granted planning permission that this isn't a problem but the land is quite marshy.


  • #4
    Drift
    Closed Accounts Posts: 1,395 ✭✭✭Drift


    The planning permission won't address any potential structural issues related to the high water table. You should ask the developer for detailed drawings and specifications for the foundations and have your own engineer check them. A high water table alone does not necessarily mean problems.


    What time of the year was the trial hole done? If the water table was at 1.5m bgl in June for example one would be quite worried about January?

    If the site is marshy it may be susceptible to flooding. The developer probably had to prove to the council that no flooding will occur. Check the planning file for that and again get your own engineer to look into it for you. There's various resources to help.

    Finally what type of effluent and surface water disposal is proposed? Again - the planning file will say and your engineer will advise you on whether it is something that may cause problems on marshy ground.


  • #5
    bleary
    Registered Users, Registered Users 2 Posts: 495 ✭✭bleary


    Thanks for this, the tests were carried out in September after a dry summer so yes it had crossed my mind what a winter test would show. There was an objection from someone on the planning file querying the method of surface water dispersal. Still after permission being granted and an appeal of that they have granted final permission. At the stage of putting down a deposit still so I haven't an engineer yet, just trying to decide if it's worth getting involved or not. I suppose I could while I check things out a bit more
    Thanks for the reply


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