Flood Zone (IMAGE) DOE/Pacific Northwest National Laboratory Caption Flood zone: The area of eastern Washington sculpted by the mammoth-killing Ice Age floods. Credit U.S. Geological Survey Usage Restrictions This map does not belong to PNNL and is from a U.S. government website. Credit should go to the U.S. Geological Survey. License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.