Entergy, an integrated energy company, completed the acquisition of Washington Parish Energy Center, a natural gas-fired peaking power plant, from Calpine, a power generation company. Financial terms were not disclosed. "We continue to seek opportunities to add to our clean-energy portfolio, and the Washington Parish Energy Center is another step in us meeting those goals. he plant also helps ensure we continue to deliver reliable power to our customers at some of the lowest rates in the country," Phillip May, Entergy President and CEO.