The earth gave way after heavy rain Saturday night into Sunday, exposing five feet of the Mariner East 1 along Lisa Drive in West Whiteland.
"It was like deja vu," said Pa. Sen. Andy Dinniman, D-Chester County. "Because this is exactly the same location where pipeline was exposed previously."
The hole is 10 feet deep. Police say a water drainage system failed, exposing the line but not damaging the 8-inch pipe.
Operator Energy Transfer Partners says the company will fill the sinkhole with "specialized grouting to ensure it remains stable." And, the Sunoco parent company says, its crews are monitoring the pipeline in the area for safety.
Dinniman is calling for an independent investigation at the state level: "... independent of Sunoco, independent of the PUC — because the citizens trust neither of these organizations to protect their public safety."