The Chilean utility Empresa Electrica Colbun Machicura is to expand its power plant at Quillota with addition of a GE 9FA gas turbine-based combined cycle plant. The gas turbine will add 250 MW to the output at the site when it enters service in simple cycle operation in May 2003. In April 2004, combined cycle operation will raise output to 385MW. Around 350MW of the output is destined for copper mines in Codelco.