Native American legends from times long ago tell of great floods that covered the earth in the Pacific Northwest. Early fur trappers describe the Willamette River as a sheet of water covering the land as far as the eye can see in the early 1800s. As American settlement of the Oregon Territory began in the 1840s, a great flood carried away many of the new businesses at the base of majestic Willamette Falls. Again and again the rivers rose, inundating...