SemGroup Corporation provides gathering, transportation, storage, distribution, marketing, and other midstream services for producers, refiners of petroleum products, and other market participants. Its Crude Transportation segment operates crude oil pipelines and truck transportation businesses. This segment operates a 460-mile crude oil gathering and transportation pipeline system in Kansas and northern Oklahoma; a 75-mile crude oil gathering pipeline system that transports crude oil from production facilities in the DJ Basin to the pipeline owned by White Cliffs Pipeline, L.L.C.; a 527-mile pipeline that transports crude oil from Platteville, Colorado to Cushing, Oklahoma; and a 215-mile crude oil pipeline in western and north central Oklahoma, as well as had crude oil trucking fleet of 225 transport trucks and 235 trailers. The company's Crude Facilities segment operates crude oil storage and terminal businesses. It has approximately 7.6 million barrels of crude oil storage capacity in Cushing, Oklahoma; and a 30-lane crude oil truck unloading facility with 350,000 barrels of associated storage capacity in Platteville, Colorado. Its Crude Supply & Logistics segment operates a crude oil marketing business. This segment has approximately 61,800 barrels of crude oil storage capacity in Trenton and Stanley, North Dakota. The company's SemGas segment provides natural gas gathering, processing, and marketing services. This segment owns and operates approximately 1,000 miles of gathering pipelines in Oklahoma and Texas. Its SemCAMS segment owns and operates natural gas processing and gathering facilities in Alberta, Canada. The SemLogistics segment engages in the receipt, storage, and redelivery of clean petroleum products and crude oil at the Milford Haven site, the United Kingdom. The SemMexico segment purchases, produces, stores, and distributes liquid asphalt cement products in Mexico. The company was founded in 2000 and is headquartered in Tulsa, Oklahoma.