The producer confirmed reports that the victim in the 3pm collapse at Castle Valley Mining’s No. 4 was Elam Derk Jones.

It also confirmed that a second injured miner was treated at a local hospital, confirming earlier reports from local media, though the company did not release the identity of that individual.

An Associated Press report said the second miner was Dallen McFarlane.

“Castle Valley is working and cooperating with both the Mine Safety and Health Administration and the state of Utah to determine the cause and circumstances surrounding the incident,” Rhino said.

“Castle Valley's Mine No. 4 has been temporarily idled while the investigation takes place.”

According to the AP, Jones had a run-in with death nearly six years ago in another fatal coal mining accident: the collapse of the nearby Crandall Canyon mine in August 2007.

Jones, who was at the complex August 6, the day of the initial fall, was reportedly getting dressed for the forthcoming shift when six workers became trapped more than 1800 feet underground.

Those six still remain beneath the mountain in central Utah, along with three rescue crew members who perished ten days later in an attempt to locate the group.

The Salt Lake Tribune also reported that Jones was one of the many rescuers that remained on site throughout the rescue effort at Crandall Canyon.

The mine is part of the Castle Valley mining complex, Rhino’s only active coal operation in Utah.

US Mine Safety and Health Administration spokesman Jesse Lawder told ILN over the weekend that crews in the Emery County mine were pillaring in an area when the roof rock, measuring 10 feet by 10 feet and about 22 inches thick, fell.

According to federal data, Castle Valley produced just under 1 million tons in 2012 with about 146,000 man hours worked. It recorded one non-fatal days lost injuries last year.

Jones’ death was the 8th in US coal in 2013.