River Herring (IMAGE) University of Massachusetts Amherst Caption In spite of state-of-the-art fish passage facilities, actual numbers of fish passing through them at hydropower dams in the Northeast over several decades reached only a tiny fraction of targeted goals. Credit UMass Amherst 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.