Hoover Dam, Lake Mead (IMAGE) University of California - San Diego Caption Hoover Dam, with Lake Mead behind it, generates 4 billion kilowatt hours per year. Credit US Bureau of Reclamation 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.