Atlantic Power Corporation (Atlantic Power) owns and operates a fleet of power generation assets in the United States and Canada. The Company's power generation projects sell electricity to utilities and other commercial customers. Atlantic Power's segments include East U.S., West U.S. and Canada. The Company's East U.S. segment comprises natural gas, biomass, coal and hydro projects. The Company's projects under the West U.S. segment include Naval Station, Naval Training Center, North Island, Oxnard, Manchief and Frederickson, which are focused on natural gas, and Koma Kulshan, which is focused on hydro. Under the Canada segment, the Company's projects located in British Columbia include Mamquam, Mamquam and Williams Lake. Its Calstock and Tunis projects are located in Ontario. The Company's portfolio consisted of interests in 19 operational power generation projects across nine states in the United States and two provinces in Canada, as of December 31, 2016.