TransAlta Corporation (TransAlta) is a wholesale power generator and marketer focused on the western regions of Canada and the United States. The Company owns, operates and manages a contracted and geographically diversified portfolio of assets, and has capability in generation fuels, including coal, natural gas, hydro and renewable energy. TransAlta has two business segments: Generation and Commercial Operations and Development. In Canada, the Company holds an ownership interest of 5,661 megawatts electrical generating capacity in thermal, gas-fired, wind-powered and hydroelectric facilities, including 4,937 megawatts in Western Canada, 628 megawatts in Ontario and 96 megawatts in New Brunswick. In the United States, its principal facilities include a 1,376 megawatts thermal facility and a 248 megawatts gas-fired facility. In November 2009, TransAlta Corporation's wholly owned subsidiary completed the acquisition of approximately 93.5% interest in Canadian Hydro Developers, Inc.