Researchers Seen Through Culvert (IMAGE) University of Washington Caption A researcher walks through a culvert to access a site for water sampling. Collecting water samples and then detecting DNA showed how two major culvert replacement projects in Washington state affected salmon. Credit Elizabeth Andruszkiewicz Allan/University of Washington Usage Restrictions With credit License Original 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.