Holly Energy Partners, L.P. (HEP) is engaged in the business of operating a system of petroleum product and crude pipelines, storage tanks, distribution terminals and loading rack facilities in west Texas, New Mexico, Utah, Oklahoma, Wyoming, Kansas, Arizona, Idaho and Washington. HEP owns and operates petroleum product and crude pipelines and terminal, tankage and loading rack facilities that support HollyFrontier Corporation (HFC) refining and marketing operations in the Mid-Continent, Southwest and Rocky Mountain regions of the United States and Alon USA, Inc.'s refinery in Big Spring, Texas. As of December 31, 2011, HFC owned a 42% interest in it, including the 2% general partner interest. It also owns a 25% joint venture interest in a 95-mile intrastate crude oil pipeline system that serves refineries in the Salt Lake City area. On November 9, 2011, it acquired from HFC certain tankage, loading rack and crude receiving assets located at HFC's El Dorado and Cheyenne refineries.