Jim:

The question was asked at the casino and they stated that there were 6 inches of water underneath the casino. However, if would be rather hard to prove one way or the other.

There was water around the water wheel near the front entrance, but with the amount of construction right behind the casino, one wonders why you would want to keep water in your basement unless you are trying to grow fish?

The closest 'natural' water that we could find nearby would have to be in the drainage ditches, but then only after a good rain!

John