Crandall Canyon mine disaster Crandall Canyon mine disaster

Robert Murray of Murray Energy (right) meets with Energy Secretary Rick Perry at the Department of Energy headquarters in Washington in a March 29, 2017, photo obtained by The Associated Press. Simon Edelman/AP hide caption

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Simon Edelman/AP

Wreaths and flowers commemorating those killed in the Crandall Canyon Mine collapse are posted at the mine entrance on Dec. 10, 2007, outside Huntington, Utah. A settlement Thursday includes mine owner Murray Energy's acceptance of four violations considered "contributory" to two fatal August 2007 mine collapses at Crandall Canyon. Douglas C. Pizac/AP hide caption

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Douglas C. Pizac/AP