SemGroup Corporation provides gathering, transportation, storage, distribution, marketing, and other midstream services for producers, refiners of petroleum products, and other market participants. The company operates in three segments: U.S. Liquids, U.S. Gas, and Canada. The U.S. Liquids segment operates crude oil pipelines, truck transportation, storage, terminals, and marketing businesses; stores, blends, and transports refinery products and refinery feedstock through pipeline, barge, rail, truck, and ship; and operates a residual fuel oil storage terminal in the U.S. Gulf Coast. This segment has 18.2 million barrels of storage capacity on the Houston Ship Channel; and 7.6 million barrels of storage capacity at the Cushing Interchange. It also operates a 460-mile crude oil gathering and transportation pipeline system in Kansas and northern Oklahoma; 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.; 2 parallel 527-mile pipelines that transports crude oil from Platteville, Colorado to Cushing, Oklahoma; 3 pipelines with an aggregate of 106 miles of pipe; 30-lane crude oil truck unloading facility in Platteville, Colorado; and crude oil trucking fleet of approximately 245 transport trucks and 235 trailers. The U.S. Gas segment provides natural gas gathering, processing, and marketing services. It operates 842 miles of gathering lines in Oklahoma; and a 53-mile high pressure gathering pipeline located in the STACK play. The Canada segment owns and operates natural gas processing and gathering facilities with approximately 530 miles of natural gas gathering and transportation pipelines in Alberta, Canada. SemGroup Corporation was founded in 2000 and is headquartered in Tulsa, Oklahoma.