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| Keywords: Lake Lewis flood profiles.jpg Upload is a series of profiles for the Lake Lewis level reached for various flood sizes w Lake Lewis was a temporary lake in the Pacific Northwest region of North America largely formed by the Missoula Floods in about the 14th millennium B C Lake Lewis was formed when the restricted flow of waters<ref>Flow was restricted by a hydraulic dam ”a restriction to the flow rate caused by a narrowed reach in a river valley </ref> from periodic cataclysmic floods from w Glacial Lake Missoula pluvial Lake Bonneville and perhaps from subglacial outbursts backed up through the constriction formed by the Wallula Gap in the Horse Heaven Hills southern Washington Water also backed up further downstream on the Columbia River between Washington and Oregon delaying the drainage of Lake Lewis The water remained for a period of weeks before the flood waters drained through Wallula Gap just southeast of the Tri-Cities area Lake Lewis reached an elevation of about 1200 above sea level today's sea level before subsiding Citation Last George V Bruce N Bjornstad and Byron M Gessel 2009 Distribution of Mammoth Mammuthus and Erratic Finds Relative to the Size of Ice Age Floods in Southeastern Washington State Pacific Northwest National Laboratory PNNL-SA-68903 Last Published by the U S Department of Energy's Pacific Northwest National Laboratory - confirmed with their legal department that reproductin publication on Wikipedia is acceptable if cited PD-USGov Palaeomaps Glacial outburst floods Lake Lewis Touchet Formation Ice age | ||||
