UHE FURNAS Dam, Brazil (image) Cary Institute of Ecosystem Studies Share Print E-Mail Caption Located on the middle of the Rio Grande, the UHE FURNAS reservoir is one of the largest in Brazil. It impounds the Grande River and has a capacity of 22,590,000,000 m3 and a surface area of 1,473 km2. Credit Fábio Roland 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.