PITTSBURGH (KDKA) – PWSA crews found damage to a storm sewer and water line near the sinkhole in downtown Pittsburgh, but it’s unclear if the damage happened before or after the collapse.

While crews are still working to repair a giant sinkhole on 10th Street, damage to a 48-inch storm sewer and 6-inch privately-owned commercial water service line was discovered.

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At this stage, PWSA says it can’t determine if the damage to the infrastructure happened before or after the collapse.

(Photo Credit: KDKA)

A spokesperson for PWSA issued a statement, saying that while there was damage underground, collapses can be caused by a number of things:

“Street collapses can occur when an underground utility fails and that failure causes soil to move or shift. Compacted soil supports a variety of different underground utilities that can be damaged if the soil condition changes. Yes, street collapses can be caused by a leaking water main, service line (the smaller diameter pipe connecting a water main to a property), sewer, or separate storm sewer. All four types of that infrastructure, along with several other types of underground utilities, are located near the collapse on 10th Street.”

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There are also electric, gas and other lines below ground.

(Photo Credit: NewsChopper 2/KDKA)

After the underground crews finish their work, it’s on to partially filling the sinkhole. A concrete layer will be poured, sidewalks and curbs repaired. Surface work is still weeks away.

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The official cause of the sinkhole has yet to be determined.