New Mariner East 1 Sinkhole Appears, PA PUC Shuts Down Pipeline January 22, 2019 Chester County, Energy Services, Energy Transfer Partners, Industrywide Issues, Pennsylvania, Pipelines, Regulation, Statewide PA, Sunoco Logistics New ME1 sinkhole in Chester County (credit: WPVI-TV Channel 6) On Sunday a new sinkhole appeared in the backyard of a home in West Whiteland Township (Chester County), PA exposing a small portion of Energy Transfer’s Mariner East 1 (ME1) NGL pipeline. Please Login to view this content. (Not a member? Join Today!) Related Post navigation SWPA Revolution Pipe Still Closed After Explosion; ET, DEP ArgueTexas Eastern Pipeline Explodes in Noble County, OH – Injuries You do not have permission to view the comments. Click here to cancel reply. Please Login to post a comment Notify me of follow-up comments by email.