The deadly explosion at Clairton Coke Works near Pittsburgh occurred when a gas valve was flushed before planned maintenance, ...

Preparations for a routine maintenance task may have led to an explosion at a U.S. Steel coal-processing plant near ...

The company released its preliminary findings from an investigation into Monday’s explosion that killed two workers.

Preparations for a routine maintenance task may have led to an explosion at a U.S. Steel coal-processing plant near Pittsburgh that left two dead and sent 10 to hospitals, the company said Friday.

A gas valve failure during maintenance work may have led to the fatal explosion at the U.S. Steel Clairton plant in ...

"Pressure built inside the valve, leading to valve failure and coke oven gas filling the area and ultimately exploding when ...

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

U.S. Steel released preliminary findings about the potential cause of the deadly explosion at U.S. Steel Clairton Coke Works ...

A popular fishing lake within Minnesota's William O'Brien State Park was almost completely drained after a 65-year-old water control valve became stuck open, leading to loss of fish and the closure of ...