Permitting problems will delay construction of the Mariner East 2 pipeline to carry natural gas liquids from the Utica and Marcellus shales across Pennsylvania.
The pipeline will not begin service until 2017, not in late 2016 as had been planned, Sunoco Logistics said on Thursday.
The line will carry NGLs to Marcus Hook outside Philadelphia for export.
The line will expand pipeline capacity from 70,000 to 345,000 barrels per day.
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