"...a land whose stones are iron and out of whose hills you can dig copper." Deuteronomy 8:9
This is the one of the final two drains along the patio drainage system. Above you'll see the rock frame around the grate which was brought up 1-2" higher to avoid weight from other rocks. We chose rocks with irregular shapes to contour the drain pipe. Extra weight on top affects the grade of the slope; hence, defeating the purpose of even having a drain!
After a few more rocks (large and small), it's finished. Compared to the other drains, this rock area is quite a bit larger. We did this because we are not expanding the patio this far and the drain was so close to the house & retaining wall. It reminds me of a dry creek bed. Our intent is to plant grass around it.
Where did we get all the rocks? From the hills, of course! (Actually, from our front yard.) There certainly is no shortage of rocks in the soil. I am convinced you can grow rocks here!!