Flushing of a gas valve made during maintenance preparation may have led to the deadly explosion at the U.S. Steel Clairton Coke plant.

Qiyam Ansari was driving to work the morning of Aug. 11 when he felt and saw an explosion occur just down the road in ...

U.S. Steel says preparations for a routine maintenance task may have led to an explosion at a U.S. Steel coal-processing ...

When horrific situations strike in the Pittsburgh area, such like the U.S. Steel Clairton coke plant explosion that killed ...

The explosion happened when workers were flushing a gas valve in preparation for maintenance on two of the plant's coke oven ...

U.S. Steel has released new details on what investigators believe caused the explosion at the Clairton Coke Works plant that ...