Doesn't sound so bad really.
Some figures:
The airport is 34,000 acres
An average city block is 6.4 acres
The airport site, though relatively flat, was lowered in some areas and raised in others, requiring the moving of 110 million cubic yards of
earth. 110 million cubic yards is approximately one-third the amount of dirt moved during the Panama Canal project. This amount of earth, if dumped
into a single pile, would cover 32 city blocks to a depth of one-quarter mile.
So the earth that is removed will cover only 204 acres out of 34,000 acres at a quarter mile deep. That's about 0.6% of the total area.
Of course there is still a possibility of some underground facility being there.
BUT the amount of earth that's been removed isn't clear evidence of that though.

|