Simulation Models Optimize Water Power (IMAGE) Fraunhofer-Gesellschaft Caption The hydroelectric plants in the Columbia River basin in the Pacific Northwest generate 22,000 MW in output. In the photo: a dam wall in the many-branched dam system. Credit © Fraunhofer IOSB Usage Restrictions The picture may be used for editorial purposes only. It is protected by copyright. The use is free of charge if the reference is mentioned. 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.