Pennsylvania today suspended permits for Sunoco Pipeline, LP's $2.5 billion Mariner East 2 pipeline project, after finding that the company committed “egregious and willful violations” of state laws.

The order directs Sunoco, a subsidiary of Dakota Access Pipeline builder Energy Transfer Partners, to stop Mariner East II construction activities across Pennsylvania. The 306-mile pipeline project would carry 275,000 barrels a day of butane, propane and other liquid fossil fuels from Ohio and West Virginia to the Atlantic coast for export.

“Suspension of the permits described,” the order states, “is necessary to correct the egregious and willful violations described herein.”