Encana Corporation produces, transports and markets natural gas, oil and natural gas liquids (NGLs). It was formed in 2002 and descends from the 19th century Canadian Pacific Railway and 'Canadian Pacific Oil and Gas' in the 20th century, respectively. All of Encana’s reserves and production are located in North America since other international assets were divested in the mid-2000s. The corporate headquarters are in Calgary, Alberta. Encana has onshore operations in Alberta and northeast British Columbia and a development off the coast of Nova Scotia. In the United States, Encanas subsidiary operates in Colorado, New Mexico, Wyoming, Texas, and Louisiana. After incorporating in 2006, Encana Corporation formed two subsidiaries in 2009, with Encana operating in "unconventional natural gas and natural gas liquids exploration, processing, and transportation, and an integrated oil company called Cenovus Energy. In October 2015, Encana announced it would sell its Colorado oil and gas assets for $900 million. Encana is Canada’s largest natural gas producer (Penty 2012-12 China Institute) with a large land position in western Canada of 7.0 million net acres, of which about 3.2 million net acres are undeveloped.