Portland General Electric Company, an integrated electric utility company, engages in the generation, wholesale purchase, transmission, distribution, and retail sale of electricity in the state of Oregon. The company operates six thermal plants; seven hydroelectric plants; and two wind farms, including the Biglow Canyon wind farm and the Tucannon River wind farm. It has approximately 26,544 circuit miles of primary and secondary distribution lines. As of December 31, 2015, it owned an electric transmission system consisting of 1,239 circuit miles, including 286 circuit miles of 500 kilovolt line, 402 circuit miles of 230 kilovolt line, and 551 miles of 115 kilovolt line. The company also purchases and sells electricity and natural gas in the wholesale market to utilities, brokers, and power marketers in the United States and Canada. It serves residential, commercial, and industrial customers. The company was founded in 1930 and is headquartered in Portland, Oregon.