Utilities

Utility lines in the Triangle are live today and will continue to cause sink holes, potential gas leaks, and other challenges in the future.

 

The utility lines issue at Philadelphia's Logan Triangle is really about the same buried infrastructure that caused the site's original collapse, and it's still a live problem today — even though the 35-acre triangle itself has sat empty for decades.

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The root cause: In the late 1800s, the city converted the Wingohocking Creek into a massive combined stormwater/sewage line running under Logan — a 24-foot-high arch outlet that made it the largest sewer conduit in Philadelphia's entire drainage system.

 

Current condition: That buried sewer conduit is still there and still active. Because that massive buried infrastructure sits under loose fill, any water main rupture in the area has an outsized chance of hollowing out the street — and this keeps happening. In February 2021, a 12-inch water main break on the 5500 block of North 11th Street opened a sinkhole that swallowed an SUV whole, and as recently as August 14, 2026, a water main break tore open another large sinkhole near 11th and Ruscomb streets in Logan, forcing a street closure — just blocks from the Triangle itself.

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No new utility lines have been laid within the Triangle itself.

 

The legacy water, sewer, and gas lines around Logan Triangle are old, sit in unstable fill, and continue to fail periodically (most recently in August 2026); no new utility infrastructure has been installed within the Triangle itself since no redevelopment has taken place.