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Date: 2013-05-02 18:18:46Safety Crandall Canyon Mine Coal mining Mining accident Sago Mine disaster Upper Big Branch Mine disaster Mining Mine Safety and Health Administration Safety engineering | w w w.laborcommission.utah.gov Office of Utah Labor CommissionAdd to Reading ListSource URL: laborcommission.utah.govDownload Document from Source WebsiteFile Size: 1,67 MBShare Document on Facebook |