U.S. Steel says its preliminary investigation found that the blast happened after pressure built up while a gas valve was ...

The preliminary findings say how the company believes the explosion occurred. A union statement cautioned the investigation ...

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

The explosion this week at U.S. Steel's Pittsburgh-area plant has reignited debate about its future. The Clairton plant is ...

The Barronvale Covered Bridge stretches its wooden frame across Laurel Hill Creek like a crimson ribbon tied around Pennsylvania’s most picturesque gift. Dating back to 1830, this wooden wonder has ...