Mariner East Pipeline Project Facts, Stats, Jobs - PA | Energy Transfer



The Mariner East pipeline system provides the needed infrastructure to transport propane, ethane and butane, all known as natural gas liquids (NGLs), from the Marcellus and Utica Shale fields to markets in Pennsylvania and beyond.

SP20 239650 MarinerMap 2 - Overview

Mariner East 1

Mariner East 1 is an existing eight-inch pipeline that was improved and refitted for the transportation of ethane and propane. Energy Transfer built a new, 50-mile section to the beginning of the line in western Pennsylvania for added connectivity. The Mariner East 2 and 2X pipelines predominantly follow the existing Mariner East 1 right-of-way across Pennsylvania.

Mariner East 2

The Mariner East 2 pipeline was put into service in December 2018 using mostly 20-inch pipeline. While some areas of the 20-inch line remain under construction, we are temporarily using sections of our 16-inch and 12-inch pipelines in Chester and Delaware counties. Mariner East 2 traverses approximately 350 miles from Ohio through West Virginia and Pennsylvania to our Marcus Hook Industrial Complex in Delaware County, PA. The pipeline connects to additional onloading and offloading points within Pennsylvania.

Mariner East 2X

Our Mariner East 2X pipeline, which parallels Mariner East 2, is currently under construction and is expected to be put into service in late 2019. Mainline construction of the 16-inch NGL pipeline is nearly complete, with the remaining work including horizontal directional drills, pipeline tie-ins and restoration.

End markets

The Mariner East system will connect along its route to a new power plant in Cambria County for ethane feed, as well as two local area propane and butane distribution terminals. The system is also playing a major role in repurposing the Marcus Hook Industrial Complex as the preeminent hub in the northeastern United States for distribution of these natural resources to domestic and global markets.

Propane, butane and ethane are products of natural gas development. They are gases that come out of the ground with traditional natural gas (methane) and are shipped in liquid form; that’s why they are called natural gas liquids. Propane is used to heat homes, businesses and farms, ethane can be used as a fuel for power generation, and butane is a component of gasoline. All three are used as basic feedstocks for making plastics, coatings, clothing and a host of other products we use every day.

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The Natural Gas Chain

SP20 255250 NatGas Chain Butane 1b - Overview
SP20 255250 NatGas Chain Ethane 1b - Overview
SP20 255250 NatGas Chain Propane 1b - Overview