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 primarily under long-term power purchase agreements (PPAs). Atlantic Power operates through four segments: East U.S., West U.S., Canada and Un-Allocated Corporate. Atlantic Power's power generation projects in operation have an aggregate gross electric generation capacity of approximately 2,140 megawatts (MW), in which its aggregate ownership interest is approximately 1,500 MW. The Company's portfolio consists of interests in approximately 20 operational power generation projects across over nine states in the United States and approximately two provinces in Canada. The Company's power generation projects are primarily located in California, the United States Mid-Atlantic, New York and the provinces of Ontario and British Columbia.