[acegopher]

An Olympic swimming pool is 50m x 25m at a depth of 2m, so an area of 1250 square meters. The continental US is 8,080,464,252,719 square meters, so it would take 6,464,371,402 Olympic swimming pools to cover the continental US. Stacking Olympic swimming pools in layers it would take about 37 layers swimming pools to cover the US with 240 billion Olympic-sized swimming pools.

So the volume of water is enough to cover the continental US with water to a depth of 75 meters if I did my math correct. And that second zone, three times larger, could cover the Continental US to a depth of 225 meters.