Chuckanut Creek Culvert (IMAGE) University of Washington Caption An example of a culvert before upgrades. These two metal pipes on Chuckanut Creek, at one of the control sites, were rusting and actually broke off during a heavy rainstorm later that winter. 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.