Farther up, where there are waterfalls on the river, or on the streams which empty into it, they build mills which are carried by water.ibiblio columbia crash date.Now, as one of these forces remains constant, and the other increases, they must at length come to be equal, that is, in equilibrium and then the log will not sink any farther.We could let the columbia crash date pail down, but I doubt very much whether we could get any water, said Forester.I should think the logs would sink under them, replied Marco, or at least roll about.gutenberg columbia crash date.3.What makes the water so columbia crash date low now? asked Marco.It was a pleasant summer morning.But then the columbia crash date rise and fall of the sea itself causes all rivers to rise and fall near their mouths, and as far up as the influence of the sea extends.