Calpine Corp. and Mitsui & Co. have been selected to build a 525 MW power plant on Mexico?s Yucatan Peninsula. Construction of the power plant is expected to begin at the end of next year. The total project output will be sold for the next 25 years to Mexico?s public electric utility, Comisi?n Federal de Electricidad, which is affiliated with the country’s government, said Calpine spokesperson Meg Laidlaw. This is Calpine?s first venture into Mexico. The generator will own a 45 percent share of the facility. Mitsui will hold 55 percent ownership. The total project cost is projected to be $270 million, and the plant is expected to be on line by mid-2006.