Rain garden in front of a retaining wall for drainage

Discussion in 'Hardscaping' started by andersman02, Sep 18, 2012.

  1. andersman02

    andersman02 LawnSite Senior Member
    Messages: 572

    A customer has a back yard where all of the drainage from the house and retaining walls drain to one spot...needless to say it gets very flooded in this spot for days sometimes weeks. She had someone install a pretty heavy duty french drain but it doesn't seem to fix the problem.

    Would a raingarden in front of the lowest retaining wall (where it ponds) impact the strength of the wall? All, and im talking about 4 pipes, of the drainage leads here. Maybe place the raingarden a few feet in front of the wall?

    She doesnt want to screw with the drainage already in place either.

    any ideas

    btw the bottom wall is about 4' tall
  2. DVS Hardscaper

    DVS Hardscaper LawnSite Fanatic
    Messages: 6,583

    Water is a walls enemy
    Posted via Mobile Device
  3. AztlanLC

    AztlanLC LawnSite Bronze Member
    Messages: 1,051

  4. White Gardens

    White Gardens LawnSite Fanatic
    Messages: 6,776

    I would extend those pipes as far as you can if it were me.

    That and if there is no-daylight area to exit to, I'd install a couple of NDS catch basins to drain the water to and possibly get the water to drain into the sub-soil better.


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