Yeah, so what’s that got to do with gardening? A whole lot!
As you can see the basic tunnels are done. I used cheap concrete blocks 8x16x4, levelled the first rows, drove the rebars through the spaces in the blocks, mixed some concrete and filled the spaces. Bit of concrete on the top face; on goes the next row using the same routine. Put the concrete slabs (12x24) on top of mortar, then mortar the joints and let set.
Crusher chips are in the tunnel space, the portals will follow much later. Now it’s back to hauling rock and gravel to build that mountain - that’s where the gardening comes in - and the waterfall.
