I am contemplating digging a drainage trench to drain my gutters instead of just having them empty onto my lawn. My plan is to go down 4 feet which is the frost line here and then install perforated drainage pipe which will funnel the water away from the house into small underground gravel beds. I have two questions.
(1) The soil in my area is sand. How big do I need to make the gravel beds to ensure drainage with no backups?
(2) Can I rent a small excavator to do this, or is operating those things strictly for professionals? Will I find it easy to dig a 16 inche wide, 4-foot deep trench?