PA PUC Shuts Down Mariner 1 Pipeline Due to Mariner 2 Sinkhole

3rd sinkhole opens up in Chester County, PA

Sunoco Logistics Partners (aka Energy Transfer Parnters) has had its challenges in constructing the twin Mariner East 2 (ME2) pipelines across Pennsylvania. Earlier this week MDN told you that underground horizontal directional drilling (HDD) work in Chester County has led to a third sinkhole developing in the area (see 3rd Sinkhole Appears Near ME2 Construction in Chester County, PA). For most of its length, ME2 is being built right next to ME1 (Mariner East 1), a liquids pipeline originally built in 1931. ME1 now flows 70,000 barrels a day of NGLs like propane to Marcus Hook, PA. The third sinkhole has exposed a portion of ME1. That is, bare steel pipeline was uncovered due to the sinkhole. Not good. That situation led to the PA Public Utility Commission (PUC) slapping ME1 with an emergency shut down order yesterday…

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