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MPC’s Midstream segment includes the operations of MPLX and other related operations. The Midstream segment gathers, processes and transports natural gas; gathers, transports, fractionates, stores and markets NGLs; and transports and stores crude oil and refined products via pipelines, terminals, towboats and barges. 

Primarily through MPLX, MPC owns, leases or has ownership interests in approximately 10,800 miles of crude oil and products pipelines, MPC also has partial ownership interests in several crude oil and products pipeline systems and product companies. 

MPC has indirect ownership interests in two ocean vessel joint ventures with Crowley through our investment in Crowley Coastal Partners. These joint ventures operate and charter four Jones Act product tankers, most of which are leased to MPC, and own and operate three 750 Series articulated tug barge vessels that are leased to MPC.