I have a patio that is sloping towards the grass in my backyard and a lot of run off from my patio floods the area where the grass is at the edge of my patio. To fix this I thought maybe I should install a trench drain. But since my patio is stamped concrete I am trying to avoiding having to concrete in the trench drain. Is there a way that I can put a trench drain into my lawn where the patio ends? Any help or suggestions would be much appreciated.