NEW ORLEANS, Louisiana, Oct. 21 [Category: BizEnergy] -- Entergy posted the following news release: * * * Next phase of Superpower Mississippi builds highly efficient, more cost-effective power generation source in Vicksburg * VICKSBURG, Miss. - Vicksburg will once again be home to an Entergy Mississippi power generation source with construction of the Vicksburg Advanced Power Station, the company's latest investment to replace retired, 50-year-old natural gas generation facilities with newe  more