Sinkholes prompt closing of Mariner East 1 pipeline by Pennsylvania agency

After a series of sinkholes developed near a Philadelphia suburb, the Pennsylvania Public Utility Commission (PUC) granted an emergency order to stop the flow of natural gas liquids on the Mariner East 1 pipeline, reports the Pittsburgh Post-Gazette. The newspaper says the PUC believes that Sunoco’s construction of two sister pipelines, Mariner East 2 and 2X, is to blame for the sinkholes and that keeping the 87-year-old Mariner East 1 pipeline active while Sunoco and regulators assess its integrity creates a public safety hazard. The pipeline is expected to stay off-line for up to two weeks, according to PUC, and it cannot be restarted without the agency’s approval after a series of tests are performed by the company. For more, read the full story.