Trench for Sewer Line

Discussion in 'Plumbing Forum, Professional & DIY Advice, Tips & ' started by rmelo99, Apr 17, 2010.

  1. rmelo99

    rmelo99 Network Engineer

    Messages:
    349
    Location:
    Connecticut
    I'm have the sewer line being replaced on Tuesday. The line is about 9 ft-10ft down. I've rented a sod cutter in an attempt at not losing large parts of the front lawn. I think the guy said the trench has to be about 4ft wide since he has to use a trench box bc of the depth.

    My question is how much SOD would you guys say I should cut on either side? I'm guessing there will be lots of dirt that needs to be piled somewhere.

    I have about 65-70' of length. So far I have removed about 8ft of width. Is 4ft enough room to pile all the dirt? Is it safe to assume he can limit his pile to one side of the trench?
  2. Redwood

    Redwood Master Plumber

    Messages:
    7,453
    Location:
    Connecticut
    You had better ask your contractor.
    Depending on the soil conditions there may be limitations on how much he can pile close to the trench.
    The weight of the soil can contribute to trench collapse.
    I do not know the soil conditions where you live.
  3. rmelo99

    rmelo99 Network Engineer

    Messages:
    349
    Location:
    Connecticut
    Soil here is pretty regular...not clay, not sand. After about a foot or two its rocky with small fieldstones...

    I figured the trench box is to prevent collapse of the trench, but that probably is limited in length and gets moved where the guy is working huh?

    I can't get a hold of him till monday and project save the lawn is going down this weekend! If he can't pile close to the trench then what? Split on either side? What is typically done?

    I had a 4ft trench dug in the back yard not to long and I remember how much dirt came out of that one. The trench was more V shaped, I'm guessing this one will be more box or squared shape since they prob need working room near the bottom and also space for the trench box.
  4. jadnashua

    jadnashua Retired Defense Industry Engineer xxx

    Messages:
    21,834
    Location:
    New England
    A large tarp or heavy plastic will help removing the dirt pile with some reduction in turf damage if it isn't down for a long period of time.
  5. rmelo99

    rmelo99 Network Engineer

    Messages:
    349
    Location:
    Connecticut
  6. hj

    hj Moderator & Master Plumber Staff Member

    Messages:
    26,315
    Location:
    Cave Creek, Arizona
    The dirt will be piled to one side so make your sod cut appropriately.
  7. SewerRatz

    SewerRatz Illinois Licensed Plumber

    Messages:
    1,706
    Location:
    Chicago, IL
    When I do sewer repairs and trenches, I always lay down 8x4 plywood sheets to put the spoils on. It has always made clean up of the spoils much easer, and protected the surrounding grass.
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