I wonder--this lake is really big, with dimensions about 40 by 120 miles. Is it possible, since it is so large, that there are localized regions where it may flood and create rivers? For example, Lake Superior has many, many rivers sticking out of it. And because it has a high surface area, and the area rains frequently (not Portland frequent, but only a bit less), isn't it possible for it to maintain this output of water?