I am looking for some suggestions on how to best reroute this downspout. Currently gravity is working it's magic and it is draining downhill following the blue arrow in the images. The water runs next to the house and pools under the deck beside the house.

The grade is down where the red arrows point. The trouble is the walkway is right there followed by the garden on a slope. I am not sure how to get over/under the walkway, and once I do letting the water out on top of the garden will possibly cause erosion. At the end of the day something will have to give, not sure what the best option may be?


enter image description here

enter image description here

  • 2
    I would imagine you need to lift up your path, use buried stormwater piping under your path and into a buried soak/dry well under your garden.
    – D-on
    Aug 26, 2016 at 4:43
  • So work to dig up concrete etc. You could build a decorative arbor, and run the drain over the top of it. Something like this 1.bp.blogspot.com/-wYpCXnimEko/VNUtFCvq6SI/AAAAAAAAAjA/…
    – Levi
    Aug 26, 2016 at 15:48

1 Answer 1


As "D-on" suggested, the best way to go is under the concrete path. If you feel like replacing the cracked section, then pull it out, dig a trench, and extend the downspout through the trench (ductwork all the way). Alternatively, dig a trench under the concrete and cut a hole directly below the downspout in the existing slab. The drawback here is you will have trouble fully back-filling the trench after installing the ductwork.

Either way, you should then put in a drywell at the terminus. Since the piping is below ground level, it can't empty into the garden in any case (unless you run the piping far enough that the ground has sloped down to its level, in which case crushed rock at the exit point will stop erosion)

  • 1
    I think removing the small section that is cracked and trenching would be the best and easiest. +
    – Ed Beal
    Aug 26, 2016 at 13:30

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service and acknowledge you have read our privacy policy.

Not the answer you're looking for? Browse other questions tagged or ask your own question.