Saturday, September 13, 2025

CSB Adds 9th Investigation to Current Investigation Page

Yesterday the Chemical Safety Board (CSB) added the “United States Steel Coporation Clairton Plant Coke Oven Explosion” to the list of active investigations on their ‘Current Investigations Page’. The Board announced that they were initiating the investigation on August 12th. Apparently, the investigation team has turned up sufficient information of interest to the Board to make a full-blown investigation worthwhile.

The fatal explosions and fires at U.S. Steel’s Clairton Coke Works plant in Clairton, PA, occurred on August 11th . News reports (here, here, and here) describe the incident. Two people have been confirmed dead and a number have been admitted to local hospitals. There is no current information available about the cause of the initial explosion, but it reportedly occurred in a coke battery which is used to convert coal into coke used in steel production. The process emits coke gas, a flammable and toxic mixture of methane, carbon dioxide, and carbon monoxide.

I would expect the Board to publish an initial report on the circumstances involved in the incident in the next week or so.

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