Preliminary findings regarding a spectacular natural gas line breach early Sunday west of Cheyenne that sent a fireball into the morning sky and damaged a train carrying hazardous materials may not be available for 30 days, according to a federal official.

An investigation into the cause of the ruptured Kinder Morgan pipeline that impacted several Union Pacific railcars just after 1 a.m. near mile marker 350 on Interstate 80 is in the early stages, Keith Holloway, a spokesperson for the National Transportation Safety Board, said in a Wednesday email to the Cowboy State Daily.

“During the on-scene phase of the investigative process, the NTSB does not determine or speculate about the cause of the accident,” said Holloway.

That’s when federal regulators collect perishable evidence and

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