The Missoula Floods
March 10 @ 10:00 am - 12:00 pm
Presenter: Bob Setterberg, Oregon Historical Society Sit back and enjoy a colorful, visual presentation about these giant floods. There were approximately 90 of them, many over 1000 feet high, occurring between 18,000 and 15,000 years ago. These floods, with flow rates up to ten times greater than all the rivers of the world today, traveled at more than 60 miles per hour, destroying everything in their path. They started in western Montana behind gigantic ice dams, tore through Eastern Washington, and completely changed the character of the Columbia River Gorge and much of the Portland/Vancouver Metro area. Flood waters then backed up into the Willamette Valley down to Eugene, Oregon, before following the Columbia River path to the Pacific Ocean. Evidence of these floods is everywhere. With Bob’s help, you will learn where to look, and you will be amazed at the evidence of the giant floods you have already seen but did not recognize.