MarkWest Energy Partners, L.P. (NYSE: MWE) is a publicly traded master limited partnership (MLP) formed in January 2002. We are engaged in the gathering, processing and transportation of natural gas
; the transportation, fractionation
, storage and marketing of NGLs; and the gathering and transportation of crude oil. We have extensive natural gas gathering, processing, and transmission operations in the Southwestern and Gulf Coast regions, and we are the largest natural gas processor in the Appalachian region of the United States. As a leading provider of midstream services in the natural gas industry, our business strategy is to deliver best-of-class service by developing high-quality, strategically located, diversified assets in the liquids-rich areas of the natural gas resource plays in the United States.