Canyon Dam and Water Pipe (IMAGE) University of Cincinnati Caption This canyon dam and water pipe were part of ancient Petra's complex water-management system. Credit Image courtesy of BUPAP (Brown University Petra Archaeological Project) Usage Restrictions None 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.