Northern Tier Energy LP is an independent downstream energy limited company. The Company has partnerships with refining, retail and pipeline operations, which serves the PADD II region of the United States. It operates its assets in two segments namely the refining segment and the retail segment. The Company�s refining segment consists of approximately 89,500 barrels per calendar day refinery located in St. Paul Park, Minnesota, which allows the Company to process a variety of light, heavy, sweet and sour crudes into higher value refined products. The Company also owns an 8.6 mile products pipeline, referred to as the Aranco Pipeline, which is leased to Magellan used to ship refined products. Its retail segment operates convenience stores under the SuperAmerica brand and also supports franchised convenience stores, which are located in Minnesota and Wisconsin and sell various grades of gasoline and diesel, tobacco products, beverages, a variety of snacks and prepackaged items.