Capline is a 40 in., 632 mile pipeline system extending from Patoka, Illinois, to St. James, Louisiana. The reversed service is scheduled to commence in September 2020.


Marathon Pipe Line LLC, the pipeline’s operator, will manage the open season and the joint tariff with Diamond pipeline. Interested shippers must execute a non-disclosure agreement and will then be provided access to the open season documents. Pending a successful open season, and subject to necessary approvals, Capline will continue project development and begin construction to enable southbound flow.

The binding open season began on Wednesday 30 January 2019 at 4 pm EST, and concludes on 30 April 2019, at 12 pm EDT. Capline Pipeline Company LLC‘s majority owner is a Plains All American Pipeline, L.P. subsidiary, and minority owners are a Marathon Petroleum Corporation subsidiary and BP Oil Pipeline Company.