Alon USA Partners, LP (Alon USA) owns and operates refining and petroleum products marketing business. Its integrated downstream business operates primarily in the South Central and Southwestern regions of the United States. It owns and operates a crude oil refinery in Big Spring, Texas with total throughput capacity of approximately 70,000 barrels per day. The crude oil pipelines the Company utilizes consist of the Amdel, White Oil, Mesa Interconnect, Centurion and Centurion Interconnect. Its Big Spring refinery produces ultra-low sulfur gasoline, ultra-low sulfur diesel, jet fuel, petrochemicals, petrochemical feedstocks, asphalt and other petroleum products. During the year ended December 31, 2011 and the six months ended June 30, 2012, sour crude, such as West Texas Sour, represented approximately 80.4% and 80.4% of its throughput, respectively, and sweet crude, such as West Texas Intermediate, represented approximately 15.8% and 17.1% of its throughput, respectively.