Grand Gulf Nuclear Station

In July 1985, Grand Gulf Nuclear Station in Port Gibson, Miss., made history by becoming the first and only nuclear power plant to produce electricity in Mississippi. Grand Gulf marked another milestone by completing a power upgrade June 16, 2012, that makes it the largest single-unit nuclear power plant in the country and fifth-largest in the world. Grand Gulf is owned and operated by System Energy Resources, Inc. (90%) and Cooperative Energy (10%). The project was one of the largest expansions of a nuclear power plant in U.S. history and increased Grand Gulf’s production by more than 13%, bringing total output to 1,443 megawatts.