On Tuesday, November 13, 2012 11:18:41 AM UTC-6, David Lesher wrote:

How can you have a silo when the water table is a few feet below
ground level?

....Simple. You find a material to line the outer walls of the silo to prevent sandtrout from encysting the water. It helps keep the sandworm population down to a bare minumum, and if you think twenty thumpers will call a bunch of worms, just watch what happens when someone fires off an SRB or two from Canaveral!

OM