I think you'll find that's nearer three hundred feet. Same order of magnitude as eighty and well short of the top of Chomolungma.
In the story, God pulls back the firmament, the pillars that keep the water out of the land. Imagine the planet's one of those snow globes, and god starts poking holes in it. The flood was an act of uncreation- and a rather poor one at that.
In fact, it doesn't really make sense if one assigns Greek ideals to the Hebrew's god. The ancient Israelites weren't monotheists, they were monolatrous. They worshipped one god, but recognized that there were other ones out there. YHWH was very powerful, but not all powerful. This concept is a much later one, introduced under the influence of pagan Hellenism (which is ironic, really).
Anyway, why would God decide to uncreate creation for humans' wickedness, but preserve one family, some of every animal, then decide that it was a bad idea, be pleased by the smell of burnt offerings, realize that humans will always be wicked (duh you made us, Big Guy!), and promise to never flood the world again. Then later, God decides he'll sire himself to kill himself then bring himself back to life so we don't have to burn offerings for him, which unfortunately was what was keeping himself from destroying the earth, so then we get Revelations.
A shorter version:
When comparing what God revealed to the ancients, then to New Testament era authors, you find mighty discrepancies in God's omniscience because of 4000 years of mismatched agendas. If god's so perfect, why does he change his mind so frequently?
Which brings me to being able to know the deities will. Can we? No. Since that's the case, why bother using the bible as a tool for interpreting our world? Trying to determine events based off the unknowable doesn't seem very useful.
Furthermore, why is that when steps away from the bible and makes an observation that wildly contradicts everything we know (and happens to be writ in the bible), the churchy-types makes the loudest noise, until the incontravertible proof is revealed. At which point, they all scurry back to their bibles, reinterpet their passages and go "ohhh, it's so obvious! Clearly it's right there, so long as you literally interpret this line, ignore this word's second, thrid and fifth meaning, and loosely interpret the last two lines! We should have seen it!"
You should have, what with reading a divinely inspired scripture and all, yet Christians and bible interpretation continues to be generations behind science. Once the proof builds to be too great, you guys reinterpret. After the fact. You at first try to get reality to align with your book, but when your god given senses prevail, you inevitably alter the book to fit reality.
What sort of divinity is that?