Hydropower - More than megawatts (image) DOE/Oak Ridge National Laboratory Share Print E-Mail Caption The latest data show hydropower represents 6.6% of all electricity generated and 38% of electricity from renewables produced in the United States. Pictured is the Red Rock Hydroelectric Project in Marion County, Iowa. Credit Missouri River Energy Services Usage Restrictions None Share Print E-Mail 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.