About MPLX

MPLX LP (MPLX) is a diversified, growth-oriented master limited partnership formed in 2012 by Marathon Petroleum Corporation (MPC) to own, operate, develop and acquire midstream energy infrastructure assets. In 2015, MPLX merged with MarkWest, whereby MarkWest became a wholly owned subsidiary of MPLX. 

MPLX is engaged in the gathering, processing and transportation of natural gas; the gathering, transportation, fractionation, storage and marketing of natural gas liquids (NGLs); and the gathering, transportation and storage of crude oil and refined petroleum products. MPLX provides services in the midstream sector across the hydrocarbon value chain through its Logistics and Storage and Gathering and Processing segments.

Logistics and Storage
MPLX transports and stores crude oil, refined products and other hydrocarbon-based products through a network of common carrier crude oil and product pipeline systems, a butane cavern, tank farms, inland marine towboats and barges, and a barge dock facility, all located in the Midwest and Gulf Coast regions of the United States. MPLX also operates additional crude oil and product pipelines owned by MPC and third parties.

Gathering and Processing
MPLX operates several natural gas gathering systems in six states. The scope of gathering services provided depends on the composition of the raw or untreated gas at producer customers’ wellheads.

MPLX’s natural gas processing complexes remove the heavier and more valuable hydrocarbon components from natural gas. MPLX currently operates natural gas processing complexes in the Marcellus Shale, Utica Shale, Appalachia region, and Southwest region.

Once natural gas has been processed at a natural gas processing complex, the heavier and more valuable hydrocarbon components, which have been extracted as a mixed NGL stream, can be further separated into their component parts through the process of fractionation. MPLX operates NGL gathering systems and NGL fractionation facilities.