Dug some stuff out. Stacked all the earth/rock into a long cylinder. Make a form over it. Concrete it. Then section by section going in and removing the rocks/earth. While doing so he separates the rocks, gravel and earth. He uses the gravel to make all of is roads he has on his land.
It is all one long structure but it is broken down to three sections. He already has the earth/rocks pretty much out of the first section and getting ready to pour the concrete for the flooring.