Where does patio drainage go to?
The primary part of this two part discussion is a decision. The figuring-out comes second.
Is the back yard high enough that an underground pipe will slope down all the way to the front yard and still slope down when it reaches the gutter?
You may need a pumping station (a pit with a sump pump) somewhere in the middle like more in the front yard.
Tunneling under a sidewalk, even for a 3 inch diameter hole, can be tricky without weakening the sidewalk.
If you made a subtle wide ditch (a swale) in the lawn, would the water flow out to the front without an underground pipe?
The disadvantages of crab apple trees. In summer, the apples are too sour to pick and eat. In winter the birds come and leave dropping all over the place.
Last edited by AllanJ; 09-22-2011 at 07:52 AM.