This is a pretty good view of the grade that we are working with. The entire landscape slopes down from right/frame to left/frame. This makes sense since it is heading to the pond off to the left about another 100 feet. The trenches we cut into the center of the walkway to house the perforated drainpipe are pretty low at the exit end. It works good, though, because the are between the pipes that is dirt in the photo is at the overhead door and will be completely filled in with river rock. The entire drainage system will be covered with rock.