In April 2008, AES Philippines purchased the Masinloc coal-fired power plant in Zambales Province in the Luzon region. Originally constructed in 1998 as a two-unit, 600-MW plant, the facility uses coal from a variety of sources in the Pacific Rim. After AES finished overhauling much of its equipment, the expanded 660-MW (gross) plant's availability increased from 48% to 74%, which enabled net electricity production to jump by 129% by 2010.