Northern Tier Energy LP is a downstream energy limited partnership. The Company has refining, retail and logistics operations that serve the Petroleum Administration for Defense District II (PADD II) region of the United States. It operates through two segments: the refining business and the retail business. Its refining segment consists of over 97,800 barrels per stream day refinery located in St. Paul Park, Minnesota. Its refineries process light, heavy, sweet and sour crudes into refined products. It also owns storage and transportation assets. The retail segment operates over 170 convenience stores and supports over 110 franchised convenience stores, which are operated under the SuperAmerica brand. These convenience stores are located throughout Minnesota, Wisconsin and South Dakota and sell various grades of gasoline and diesel, tobacco products and immediately consumable items, such as beverages, prepared food and a range of snacks and prepackaged items.