I imagine a large number are off mining materials to actually make the concrete. As for the rest, the bottom layer was over 550,000 square feet. That's a lot of room for 5 or 10 thousand people. As you build up you need less people. And you can always work in shifts to spread out the people.
I imagine a large number are off mining materials to actually make the concrete. As for the rest, the bottom layer was over 550,000 square feet. That's a lot of room for 5 or 10 thousand people. As you build up you need less people. And you can always work in shifts to spread out the people.