Plains is a master limited partnership engaged in pipeline transport, marketing, and storage of liquefied petroleum gas and petroleum in the United States and Canada. Plains owns interests in 18,370 miles of pipelines, storage capacity for about 75 million barrels of crude oil, 28 million barrels of NGLs, 68 billion cubic feet of natural gas, and 5 natural gas processing plants. The company is headquartered in the Allen Center in Downtown Houston, Texas. Plains is a publicly traded Master limited partnership. PAA owns an extensive network of pipeline transportation, terminalling, storage and gathering assets in key crude oil and NGL producing basins and transportation corridors at major market hubs in the United States and Canada. Wikipedia