|Imagine two raindrops falling from the clouds to land
side by side, only inches apart, on the Ozark Divide.
One, by chance, falls just to the south of the very top of the
ridge. The other falls just across the ridgetop, to the north.
They will not meet again for many days and then after a journey
of over a thousand miles. Though they began their journey only inches
apart, they have not only fallen into different watersheds; they
have fallen into different river basins.