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

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. U.S ...

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

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

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

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

Nearly a week after a mechanical failure led to millions of gallons of water dumping out of Alice Lake at William O'Brien State Park, Minnesota's Department of Natural Resources is trying to focus on ...

A gas valve failure caused the explosion at Clairton Coke Works on Monday morning that killed two people, U.S. Steel said ...