MPLX might take more than 30 minutes to deliver crude oil through its pipeline system to the refinery. MPLX was formed by Marathon Petroleum Corporation (MPC) in March 2012 to take over a portion of its midstream operations. MPLX has an indirect 51% stake in about 2,800 miles of pipeline across nine states in the Midwest and Gulf Coast, as well as a Mississippi River barge dock that can handle 80 million barrels per day of crude oil, and tank farms located in Illinois and Indiana. (MPC owns the other 49% of these assets.) MPLX also owns outright a butane cavern in West Virginia with a storage capacity of 1 million barrels. The company began publicly trading in October 2012.