Brian Doyle remembers the explosion that hurled him to the coke plant’s floor — but little else from that day. It was a Wednesday — July 14, 2010 — and Doyle, a steamfitters union member and contractor for Power Piping,

In the last five years, U.S. Steel has paid more than $10 million in penalties for violations of the Clean Air Act at Clairton.

Channel 11 spoke exclusively with United Steelworkers Local 1557 Vice President Richard Tikey, sharing his reaction to new details in the investigation into the deadly explosion at the Clairton Coke Works.

U.S. Steel says it believes a gas valve failure led to the explosion Monday morning at its Clairton Coke Works, in which two workers died and 10 others were injured.

An explosion at US Steel's Clairton Coke Works in Allegheny County, PA, left several injured. The plant sits along the Monongahela River near Pittsburgh.