HollyFrontier Corporation is an independent petroleum refiner. The Company produces various light products, such as gasoline, diesel fuel, jet fuel, specialty lubricant products, and specialty and modified asphalt. It segments include Refining and Holly Energy Partners, L.P. (HEP). The Refining segment includes the operations of the Company's El Dorado, Kansas (the El Dorado Refinery); refinery facilities located in Tulsa, Oklahoma (collectively, the Tulsa Refineries); a refinery in Artesia, New Mexico that is operated in conjunction with crude oil distillation and vacuum distillation and other facilities situated 65 miles away in Lovington, New Mexico (collectively, the Navajo Refinery); refinery located in Cheyenne, Wyoming (the Cheyenne Refinery); a refinery in Woods Cross, Utah (the Woods Cross Refinery), and HollyFrontier Asphalt Company (HFC Asphalt). The HEP segment involves all of the operations of HEP. HEP is a limited partnership, which owns and operates logistic assets.