[stoic]

Subterranean construction (basements, tunnels, subways etc) is uncommon in Texas due to a very thick (6-10') layer of limestone bedrock which must be drilled or blasted. This is probably not a good tradeoff for Google or their partners in terms of cost.

[c12]

I did begin to wonder why they couldn't just bury the damn things in the first place; still even though it would certainly add to the initial start up cost, once in place they will continue to make Google money so why not spend the extra initially.