The artifacts left in the ground will be around longer than the one put through your laboratory. The one left in the ground will be around for thousands of years. The one brought into your lab will be around for hundreds of years or less.

What you say is only so certain. You dont seem as quick to innovate as others. Why not put a building on top of it and add to its shelter? Everyone will react poorly to eminent domain. So what? Think about the variables.