Lake Bed (IMAGE) University of Washington Caption Fine sediment, woody debris and a new sprout are found in the bed of Lake Mills, the former reservoir behind the Glines Canyon Dam. Credit Emily Eidam, Univ. of Washington Usage Restrictions With credit. 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.