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The drain configuration depends on the direction and degree of slope. Yeah, you might need to work around it, unless the patio is positioned on the upward slope, on the side of the yard opposite the outlet(s). Below is a picture depicting where a french drain could be located with respect to a patio and slope. Also, I am assuming the patio is solid concrete ...


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Obviously, the soil needs to be graded away from the house (in the back yard). If that means you need a retaining wall, then you need a retaining wall. Regarding the swale, improved drainage sounds helpful. The real question is, why isn't water shedding (what is the real issue)? I've had swale issues, and the problem in those cases, was not with my swale, ...



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