Semgroup Corp was founded in February, 2000 and is based in Tulsa, Oklahoma. The Company is a provider of gathering, transportation, storage, distribution, marketing and other midstream services to independent producers, refiners of petroleum products and other market participants located in the Midwest and Rocky Mountain regions of the United States of America and Canada. The Company maintains and operates storage, terminal and marine facilities at Milford Haven in the United Kingdom that enable customers to supply petroleum products to markets in the Atlantic Basin. It also operates a network of liquid asphalt cement terminals throughout Mexico. The Company operates its business through six segments; Crude, SemStream, SemLogistics, SemCAMS, SemMexico, and SemGas. The Company's Crude segment operations include crude oil transportation, storage, terminalling, gathering and marketing in Colorado, Kansas, Louisiana, Montana, New Mexico, North Dakota, Oklahoma, Texas and Wyoming, for third-party customers as well as for itself. Its SemStream segment is engaged in the residential propane supply business through its wholly-owned subsidiary, SemStream Arizona, with operations in Page and Payson, Arizona. Its SemLogistics segment owns the independent petroleum products storage facility in the U.K. The facility is located on the north bank of Milford Haven on the west coast of Wales. Its SemCAMS segment operates majority-owned gathering assets and natural gas processing plants. All of SemCAMS' assets are located in West-Central Alberta, in the heart of the Western Canadian Sedimentary Basin. Its SemMexico segment operates a network of liquid asphalt terminals in Mexico. Its operations include purchasing, producing, storing and distributing liquid asphalt cement products. Its SemGas segment provides gathering, processing and storage services to the natural gas markets in the U.S. SemGas owns and operates gathering systems and processing plants in Kansas, Oklahoma and Texas. The Company competes with other midstream companies, integrated oil companies and their marketing affiliates, crude oil pipeline companies and independent gatherers, brokers and marketers of petroleum products of varying sizes, financial resources and experience.