DEP Approves Marsh Creek Modifications in Chester County

The Pennsylvania Department of Environmental Protection (DEP) today approved the major modification for a portion of Mariner East running through the Marsh Creek area in Upper Uwchlan Township, Chester County.

In April, the pipeline developer submitted plans to DEP for a “major modification” for its permitted work at this site. The change would alter the construction method from horizontal directional drilling to open cut, with additional alterations to the pipeline route. DEP held a virtual hearing on the proposal on June 16. More than two dozen PEIA members and other stakeholders and partners submitted remarks or testified during the hearing.

The pipeline stretches more than 300 miles across the commonwealth, linking natural gas drilling sites in western Pennsylvania to processing plants and market opportunities in eastern Pennsylvania. The Marsh Creek site is the final link for finishing the cross-state pipeline.

If you are writing about this DEP decision, please feel free to attribute the following statement to Kurt Knaus, spokesman for the Pennsylvania Energy Infrastructure Alliance (PEIA):

“The news of this approval comes at a time when many Pennsylvanians are worried about rising energy prices. Mariner East delivers valuable natural gas resources like propane, which heats homes and powers businesses. DEP’s approval means we can finally get to work to finish this project so we can realize its full potential in Pennsylvania. This modification has broad support because it’s best for the community, good for the environment, and safe for workers.”


For nearly six years, the Pennsylvania Energy Infrastructure Alliance has advocated for the safe, responsible development of critical infrastructure. For more information:

Twitter: @PAllies4Energy