Pennsylvania Relies on Energy.

We Deliver It Safely.

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.

The Mariner East system comprises the Mariner East 1, Mariner East 2 and Mariner East 2X pipelines. Together, these pipelines continue to create thousands of well-paying construction jobs and support hundreds of permanent, family-sustaining jobs.

The pipelines provide a safer means to deliver NGLs that are otherwise transported through neighborhoods on trucks and trains. They also support continued production in the shale fields in western Pennsylvania, Ohio and West Virginia, bringing further economic growth and opportunity across the state.

Energy Transfer is committed to safety at the highest level. The safety of our employees and the community is our highest priority, and we believe that no project is worth doing if it cannot be done safely.

We are #Committed2PA

As part of our continued efforts in Pennsylvania, we remain committed to:

More than $9 billion in the pipeline

Study shows Mariner East projects will have a big impact on Pennsylvania

Our employees, contractors and facilities throughout Pennsylvania have been contributing to the state’s economy for more than a century, most recently through the expansion of our Marcus Hook Industrial Complex and our Mariner East pipeline system. These projects, however, are just the beginning. More than $9.1 billion in economic benefits for the state over the next six years is anticipated, according to a 2018 economic impact study released by independent consultant Econsult Solutions.

This report shows the importance of the Mariner East system to our state’s economy — not only for the thousands of local tradespeople who are earning family-sustaining wages and spending their money in the local community, but also for the hundreds of small businesses and companies providing goods and services to those workers, their families and the companies building and operating this critical energy infrastructure project.

Economic Study Statistics


Working together to deliver safe energy

Energy Transfer coordinates training with first responders across Pennsylvania

At Energy Transfer, safety is not just a slogan — it’s our culture. We developed a Mariner Emergency Responder Outreach Program (MERO) in which we meet with first responders in all the counties we pass through to train them on the products we transport and assist them in refining their own emergency response plans.

These sessions are in addition to the annual Pennsylvania Pipeline Awareness and Emergency Response Training for emergency officials, public officials and excavators scheduled throughout Pennsylvania, and numerous emergency preparedness meetings held in collaboration with school districts along the pipeline route.

Read more about our commitment to working together to safely transport the natural gas liquids that make up many of our everyday items.

The MERO program has trained

More Than 3,000

individuals since 2013 across the pipeline path.

Project representatives held

More Than 750

meetings with municipal leaders.

Marcus Hook Industrial Complex union laborers worked

More Than 2 million

hours without injury in 2017.

A transformation coming to Pennsylvania

Marcus Hook poised to become energy hub that rivals Gulf Coast

As part of the Mariner East project, our Marcus Hook Industrial Complex in eastern Pennsylvania is being revitalized from a former refinery into a world-class NGLs hub. Improvements at the facility have required nearly 9 million man hours, involving more than 5,000 individual workers. In April 2019, Energy Transfer announced a project labor agreement (PLA) with the Philadelphia Building Trades, an association of some 50 local unions. The two-year, $200 million agreement is estimated to create 1,200 jobs. The facility processes, stores and distributes NGLs to local markets in and around Pennsylvania, and abroad. Seasonally dependent, approximately 200 trucks per day pick up propane for local deliveries.

Project Update

Energy Transfer is committed to conserving and protecting Pennsylvania’s natural resources, and each spring we participate in a number of efforts in honor of Earth Day. Read

For the past half-century, Bill Kelly has been a central figure in protecting the Marcus Hook and Claymont ... Read

On March 21, 1902, the first shipment of crude oil was delivered by the SS Paraguay to the Marcus Hook ... Read