Using the jackhammer, we break the rock up into manageable pieces and clear out all the rock and dirt down about 2 feet deep, to another layer of rock.
For this section, we need a lot of concrete.
We ended up using 52 bags of Quik-crete, from Home Depot $120.36, framing the walls using Masonite sheets with plastic bags of mulch and manure to hold everything in place.
The one notable part of this was the tube for the irrigation lines. We will want to run 2 irrigation lines, for two different zones, from the water line and valves on one side of the walkway over to the beds on the other side. We put a 4 inch PVC tube in to allow these to be run later. At the moment, we can't put the lines down as far as we want because of the rock on the house side. Since the rock is so close to the surface, the irrigation lines are not deep enough. We ran the PVC tube at the level we want the irrigation lines to be, and we will need to dig the rock out of the house side to get them down low enough.
The next section will be a bit more difficult, because it has the irrigation water supply line (and zone electrical wires) in it. We need to dig it up, and then re-bury it without damaging it.
