Atlantic Power Corporation (Atlantic Power) owns and operates a fleet of power generation and infrastructure assets in the United States and Canada. The Company's power generation projects sell electricity to utilities and industrial customers under long-term power purchase agreements. During the year ended December 31, 2011, its power generation projects in operation had an aggregate gross electric generation capacity of approximately 3,397 megawatts in which its ownership interest was approximately 2,140 megawatts. The Company operates in five segments: Northeast, Southeast, Northwest, Southwest and Un-allocated Corporate. In April 2013, the Company sold its interest in three Florida projects: Auburndale Power Partners Limited Partners (Auburndale), Lake Cogen, Ltd. and Pasco Cogen, Ltd.