Entergy Corporation,(re-named from Middle South Utilities in 1989, merged with Beaumont TX based Gulf States Utilities in 1993) based in New Orleans, Louisiana 's an integrated energy company engaged primarily in electric power production and retail distribution operations. A member of the Fortune 500, Entergy owns and operates power plants with approximately 30,000 megawatts of electric generating capacity, and it's the second-largest nuclear generator in the United States. Entergy delivers el… (More on Entergy)