Mariner West is a 643km-long onshore pipeline project operated by Sunoco Pipeline. This NGL pipeline, with a maximum diameter of 10 inches, starts at Pennsylvania (the US) and ends in Ontario (Canada).

The Mariner West project started operations in 2013 and is owned by Energy Transfer and Marathon Petroleum.

The Mariner West project is associated with the 112km Mariner South.


Information on the pipeline is sourced from GlobalData’s Oil & Gas Pipelines database that provides detailed information on all active and upcoming, crude oil, natural gas, petroleum products and Natural Gas Liquids (NGL) trunk pipelines globally. Not all companies mentioned in the article may be currently existing due to their merger or acquisition or business closure.