National Geographic : 1942 Oct
Like the Rhine above Coblenz, the Lower Columbia Sweeps Past Farms, Cliffs, and Wooded Slopes Escaping here from the mountains, the mighty river soon meets the incoming Willamette River and forms the rich, long-settled valley ofthat name. Most navi gation plies between Portland and the sea. Pioneer fur-trading Astoria stands near the river's mouth. More hydroelectric power can bedeveloped bythe Columbia with its tributaries than by any other river in the United States (page 436).